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Basic iOS Technical Test MCQ

1. Which of the following cryptographic algorithms are supported in iOS1O or higher?

SHA-1

SHA - 256

SHA-2

All of the above are supported.

Answer

Correct Answer: SHA-1
SHA - 256
SHA-2

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2. Which of the following statements are correct about Apple Pay Buttons?

Use only the API button to generate Apple Pay button for iOS 8.3 or higher.

Apple Pay buttons can be used to invoke other views as well.

For portrait and landscape formats. same style of the buttons should be used.

Payment buttons must always invoke the Apple Pay payment sheet.

Answer

Correct Answer: Apple Pay buttons can be used to invoke other views as well.
For portrait and landscape formats. same style of the buttons should be used.
Payment buttons must always invoke the Apple Pay payment sheet.

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3. With respect to the DispatchSource.ProcessEvent event in Grand Central Dispatch (GCD), which of the following options is/are the valid instance method(s)?

contains

formUnion

insert

init

Answer

Correct Answer: contains
formUnion
insert

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4. We have two objects: OBJA and OBJB. OBJB points to another object OBJX. Which of the following test cases are correct related to these 3 pointers?

If objects OBJA and OBJB are destroyed, then OBJX may also get destroyed or get leaked.

If object OBJB destroys OBJX, then OBJA will become a dangling pointer.

OBJA can destroy OBJB directly, without involving OBJX.

The dangling pointer in option C can cause the related app to crash.

Answer

Correct Answer: If object OBJB destroys OBJX, then OBJA will become a dangling pointer.
The dangling pointer in option C can cause the related app to crash.

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5. Which of the following statements are correct about NSManagedObjectContext?

iOS 10 onwards can now fetch and fault concurrently with other peer NSManagedObjectContext instances.

A single managed object instance can exist in multiple contexts.

Nested NSManagedObjectContext instances still serialize requests against their parent context.

Answer

Correct Answer: iOS 10 onwards can now fetch and fault concurrently with other peer NSManagedObjectContext instances.
Nested NSManagedObjectContext instances still serialize requests against their parent context.

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6. Which of the following classes are deprecated in Sirikit?

INParameter

INlntentParameter

INlntentResponseParameter

INParameterProtocol

Answer

Correct Answer: INlntentResponseParameter

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7. Which of the following options are correct regarding automatic reference counting (ARC)?

The retain and release functionality is in-built in ARC.

The retain and release messages can be still called directly while using ARC.

ARC is implemented as a part of the compiler.

It may insert temporary variables for efficient memory management.

Answer

Correct Answer: The retain and release messages can be still called directly while using ARC.
It may insert temporary variables for efficient memory management.

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8. Which of the following functions of the AVCaptureSession class manage the running state of a capture device?

beginConf‌iguration ()

commitConf‌iguration ()

removeOutput ()

startRunning ()

stopRunning ()

Answer

Correct Answer: startRunning ()
stopRunning ()

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9. In iOS10, which of the following are the new behavioral changes in Core data?

The performBlockAndWait implicitly includes an autorelease pool around each block.

NSManagedObjectContext defaults to a nil NSUndoManager on macOS. It is always defaulted to nil on ios.

NSPersistentStoreCoordinator provides a new addPersistentStoreWithDescription(:completionHandler:) method that takes an NSPersistentStoreDescription object.

NSManagedObjectContext provides a automaticallyMergesChangesFromParent property that causes it to automatically register as an observer of an NSManagedObjectContextDidSaveNotif‌ication Object.

Answer

Correct Answer: The performBlockAndWait implicitly includes an autorelease pool around each block.
NSManagedObjectContext defaults to a nil NSUndoManager on macOS. It is always defaulted to nil on ios.

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10. Which of the following statements are correct about background app modes?

Audio and AirPlay modes allow an app to play audio content or record audio in the background.

Location updates mode allows an app to inform the device users of their location.

Bluetooth LE accessories mode allows an app to perform Bluetooth communication in peripheral mode.

Remote notif‌ications mode allows an app to download content when a push notif‌ication is received.

Answer

Correct Answer: Audio and AirPlay modes allow an app to play audio content or record audio in the background.
Location updates mode allows an app to inform the device users of their location.

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11. Which of the following stages of an ln-App purchase are handled by the App Store?

It provides product information.

It makes payment requests.

It processes payment requests.

It displays the store Ul.

Answer

Correct Answer: It provides product information.
It makes payment requests.
It processes payment requests.

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12. Apple Pay JavaScript API is supported on which of the following?

Devices having iOS 10 or higher.

Devices having macOS 10.12 or higher.

Safari Desktop browser.

Chrome Desktop browser.

An Apple device having the Touch to authorize the payment.

Answer

Correct Answer: Devices having iOS 10 or higher.
Devices having macOS 10.12 or higher.
Safari Desktop browser.
Chrome Desktop browser.

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13. Which of the following Options are the three components of App Thinning?

Slicing

Bitcode

Garbage Collection

On demand Resources

Answer

Correct Answer: Slicing
Bitcode
On demand Resources

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14. Which of the following classes have DispatchObject as the base class?

DispatchQueue

DispatchGroup

DispatchSource

DispatchPredicate

Answer

Correct Answer: DispatchQueue
DispatchSource

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15. In iOS 10, which of the following options are correct about pasteboard?

The Find pasteboard is unavailable.

The named pasteboards are persistent

The new Handoff feature allows the general pasteboard contents to automatically transfer between devices.

The UlPasteboard class supports the Clipboard feature, which lets users copy and paste between devices.

Answer

Correct Answer: The Find pasteboard is unavailable.
The new Handoff feature allows the general pasteboard contents to automatically transfer between devices.
The UlPasteboard class supports the Clipboard feature, which lets users copy and paste between devices.

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16. Which of the following Accessing Action attributes belong to the CXAction class?

uuid

isComplete

timeoutDate

callUUID

Answer

Correct Answer: uuid
callUUID

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17. Which of the following methods of the UlAppIication objects are called by an app that requires additional time for the completion of a task ?

beginBackgroundTaskWithName:expirationHandler

beginBackgroundTaskWithExpirationHandler

endBackgroundTask

applicationDidEnterBackground

Answer

Correct Answer: beginBackgroundTaskWithName:expirationHandler
endBackgroundTask
applicationDidEnterBackground

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18. In ios10, which of the following statements are correct about Xcode auto generation of classes?

Xcode now supports automatic generation of NSFetchRequest subclasses in the modeling tool.

Xcode now supports automatic generation of NSManagedObject subclasses in the modeling tool.

In the entity inspector of Xcode. category/extension generates a class extension in a file named such as CIassName+CoreDataGeneratedProperties.

The generated f‌iles are placed in DerivedData, and are indexed by Xcode for faster searching and commandline locating.

Answer

Correct Answer: Xcode now supports automatic generation of NSFetchRequest subclasses in the modeling tool.
In the entity inspector of Xcode. category/extension generates a class extension in a file named such as CIassName+CoreDataGeneratedProperties.
The generated f‌iles are placed in DerivedData, and are indexed by Xcode for faster searching and commandline locating.

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19. In iOS, which of the following options are correct regarding slicing?

It is a process of creating and delivering variants of an app.

It is an intermediate representation of a compiled program.

It is a process of supplying additional components such as images. sound files. etc.

It is simulated by Xcode, during the development process.

Answer

Correct Answer: It is a process of creating and delivering variants of an app.
It is an intermediate representation of a compiled program.

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20. Which of the following statements are correct about NSFetchedResuItsController?

The result type for an NSFetchRequest is NSFetchRequestResult.

It is inherited from the NSPersistentContainer class.

It is a parameterized type. which carries through to collections and methods derived from the NSFetchRequest that defines it.

When an NSFetchedResultsController object is initialized, the required parameters are: a fetch request and a managed object context.

Answer

Correct Answer: The result type for an NSFetchRequest is NSFetchRequestResult.
When an NSFetchedResultsController object is initialized, the required parameters are: a fetch request and a managed object context.

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21. In ApplePay JS, which of the following are correct about the ApplePayPaymentRequest data type?

It showcases the outcome of authorizing a payment request and contains encrypted payment information.

It contains the information about a request for payment and its payment processing capabilities.

It contains the information about the payment amount.

It contains the information about the shipping address.

Answer

Correct Answer: It contains the information about a request for payment and its payment processing capabilities.
It contains the information about the payment amount.
It contains the information about the shipping address.

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22. Which of the following App Extension points are available both in iOS and macOS?

Action

Content Blocker

Intents

Photo Editing

Answer

Correct Answer: Action
Content Blocker
Photo Editing

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23. Which of the following statement are correct about the NSManagedObject class?

It is inherited from the NSPersistentContainer class.

It has new methods: entity() and fetchRequest()

It performs dynamic accessor generation to properly generate accessors for ordered to-many relationships.

It uses initfcontext: NSManagedObjectContext) to initiate the class object.

Answer

Correct Answer: It has new methods: entity() and fetchRequest()
It uses initfcontext: NSManagedObjectContext) to initiate the class object.

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24. Which of the following options are correct about the Operation class, NSOperation?

This class is used to create an operation object based on an object and selector from an application.

This class is used to execute one or more block objects concurrently.

This class is used to def‌ine custom operation objects.

Subclassing this class enables full control over the implementation of operations.

Answer

Correct Answer: This class is used to execute one or more block objects concurrently.
This class is used to def‌ine custom operation objects.
Subclassing this class enables full control over the implementation of operations.

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25. The iMessage app is used to:

showcase a custom user interface inside the Messages app using the MSMessagesAppViewController class.

create a custom or dynamic sticker browser using the MSStickerBrowserViewControlIer class. insert text, stickers or media f‌iles into the Messages app‘s input f‌ield using the MSMessage Class.

update interactive messages (e.g. creating games or collaborative apps) using the MSSession class.

Answer

Correct Answer: showcase a custom user interface inside the Messages app using the MSMessagesAppViewController class.
create a custom or dynamic sticker browser using the MSStickerBrowserViewControlIer class. insert text, stickers or media f‌iles into the Messages app‘s input f‌ield using the MSMessage Class.
update interactive messages (e.g. creating games or collaborative apps) using the MSSession class.

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26. In iOS 10, which of the following are the new methods introduced in the NSManagedObject class?

func ChangedValuesForCurrentEven ()

func awake(fromSnapshotEvents: NSSnapshotEventType)

func entity()

func fetchRequestO

Answer

Correct Answer: func ChangedValuesForCurrentEven ()
func awake(fromSnapshotEvents: NSSnapshotEventType)
func entity()
func fetchRequestO

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27. Which of the following statements are correct about NSFetchRequest?

In iOS10. it is now a parameterized type based on a new NSFetchRequestResult protocol.

NSFetchRequest also offers a new method executeo. and directs the NSManagedObjectContext to execute a fetch request.

It is inherited from the NSPersistentContainer class.

The result type for an NSFetchRequest is NSFetchRequestResult.

Answer

Correct Answer: In iOS10. it is now a parameterized type based on a new NSFetchRequestResult protocol.
NSFetchRequest also offers a new method executeo. and directs the NSManagedObjectContext to execute a fetch request.
The result type for an NSFetchRequest is NSFetchRequestResult.

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28. Which of the following App Transport Security dictionary keys are of the type, Boolean?

LEI NSAIlowsArbitraryLoads

F‘l NSAIIowsArbitraryLoadsForMedia

[7| NSAIlowsArbitraryLoadslnWebContent

NSAllowsLocalNenvorking

[7| NSExceptionDomains

Answer

Correct Answer: [7| NSAIlowsArbitraryLoadslnWebContent

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29. Which of the following are the App Transport Security (ATS) exception domains dictionary keys (not primary keys)?

NSAllowsArbitraryLoadsanebContent

NSAllowsLocalNetworking

NSlncludesSubdomains

NSRequiresCertificateTransparency

Answer

Correct Answer: NSAllowsLocalNetworking
NSlncludesSubdomains
NSRequiresCertificateTransparency

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30. Which of the following classes provides input data to a capture session?

AVCaptureDevicelnput

AVCaptureConnection

AVCaptureOutput

AVCapturelnput

Answer

Correct Answer: AVCapturelnput

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31. To prevent memory leakage, iOS uses a policy based on a number, which is maintained by every reference object. What is it called?

Counters

Pointers

Retain Count

Garbage Collection

Answer

Correct Answer: Retain Count

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32. which of the following class objects is used to manage capture activity and coordinates the flow of data from input devices to capture outputs?

AVCapturedevice

AVCaptureSession

AVCapturePhotoOutput

AVCapturePhoto

Answer

Correct Answer: AVCaptureSession

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33. In SiriKit, which of the following INSearchCallHistorylntent class instance properties is deprecated in iOS1O onwards?

dateCreated

callTypes

callCapabilities

callType

Answer

Correct Answer: callType

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34. Apple Pay uses Passkit framework. Which of the following classes in Passkit framework is used to store information about Apple Pay Cards?

PKAddPaymentPassRequest

PKPayment

PKPaymentMethod

PKPaymentSummaryltem

Answer

Correct Answer: PKPayment

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35. You want to pay for a gym subscription for 10 months. The payment is to be made via Apple Pay. It is a type of:

Fixed Subscription.

Flexible Frequency Subscription.

Flexible Amount Subscription.

Managed Subscription.

Answer

Correct Answer: Fixed Subscription.

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36. You want to pre-order an item from an online store. The payment for the pre-order is to be done using Apple Pay. This scenario comes under which of the following transaction types?

Authorization & capture.

Authorization & delayed capture.

Authorization & capture with different amount.

Authorization unknown amount & capture.

Answer

Correct Answer: Authorization & delayed capture.

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37. Core Data now supports pinning an NSManagedObjectContext to a specific query generation. Which of the following classes iS used to specify a pinning behavior or a specific version from another context?

NSPersistentStoreCoordinator

NSOueryGenerationToken

NSPersistentContainer

NSPersistentStoreDescription

Answer

Correct Answer: NSOueryGenerationToken

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38. In the AVFoundation framework, which of the following classes contains per-pixel distance or disparity information, while capturing images using iphone 7 plus?

AVCaptureDepthDataOutput

AVDepthData

AVCapturePhoto

AVCapturePhotoOutput

Answer

Correct Answer: AVDepthData

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39. In the Notif‌icationCenter framework, the NCWidgetController class is inherited from the:

NCWidgetListViewController class.

NCWldgetSearcthewController class.

NSViewController class.

NSObject class.

Answer

Correct Answer: NSObject class.

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40. The lNVocabulary class in SiriKit is inherited from which of the following classes?

NSObject

NSObjectProtocol

lNIntent

lNlntentResponse

Answer

Correct Answer: NSObject

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41. Which of the following classes is used to specify a notification's content and the condition that triggers its delivery?

UNTextlnputNotificationAction

UNNotif‌icationAction

UNNotif‌icationRequest

UNPushNotif‌icationTrigger

UNTextlnputNotificationResponse

Answer

Correct Answer: UNNotif‌icationRequest

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42. In the AVFoundation framework, which of the following classes has been deprecated in iOS 10?

AVCaptureDevice

AVCaptureSession

AVCapturePhotoOutput

AVCapturePhoto

AVCaptureStilllmageOutput

Answer

Correct Answer: AVCaptureStilllmageOutput

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43. Which of the following is a new class in the AVFoundation framework, which is used to provide a modern interface for capture workflows related to still photography?

AVCaptureDevice

AVCaptureSession

AVCapturePhotoOutput

AVCapturePhoto

Answer

Correct Answer: AVCapturePhoto

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44. Which of the following is a new key for the info.plist file introduced in iOS 10?

CFBundleVersion

UIStatusBarStyle

UlRequiresPersistentWiFi

NSAIIowsArbitraryLoadsanebContent

Answer

Correct Answer: NSAIIowsArbitraryLoadsanebContent

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45. Which of the following Trigger class objects indicates that a notif‌ication was sent by the Apple Push Notification Service?

UNCaIendarNotificationTrigger

UNTimelntervalNotificationTrigger

UNNotif‌icationTrigger

UNPushNotif‌icationTrigger

UNLocationNotificationTrigger

Answer

Correct Answer: UNPushNotif‌icationTrigger

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46. Which of the following SiriKit components is a type of protocol?

lNExtension

INlntent

INlntentResponse

INlntentHandlerProviding

Answer

Correct Answer: INlntentHandlerProviding

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47. Which of the following CodeDate classes maintains a small connection pool for allowing concurrent database operations for NSSOLiteStoreType persistent stores?

NSManagedObjectContext

NSPersistentStoreCoordinator

NSPersistentContainer

NSPersistentStore

Answer

Correct Answer: NSPersistentStoreCoordinator

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48. Which of the following events of the Apple Pay JS framework defines the attributes contained by the onshippingmethodselected callback function?

ApplePayPayment

ApplePayShippingMethodSelectedEvent

ApplePayPaymentAuthorizedEvent

ApplePayPaymentMethodSelectedEvent

ApplePayValidateMerchantEvent

Answer

Correct Answer: ApplePayShippingMethodSelectedEvent

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49. Which of the following is an object that manages a memory—based data buffer in Grand Central Dispatch (GCD)?

DispatchData

DispatchWorkltem

DispatchSemaphore

DispatchTime

Answer

Correct Answer: DispatchData

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50. Which of the following classes manages notif‌ication-related activities for an app or app extension?

NCWidgetProviding

UNUserNotificationCenter

UNNotif‌icationSettings

NSObject

Answer

Correct Answer: UNUserNotificationCenter

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51. Which of the following ApplePay JS Data Types showcases the outcome of authorizing a payment request and contains encrypted payment information?

ApplePayLineltem

ApplePayPayment

ApplePayPaymentContact

ShippingMethod

Answer

Correct Answer: ApplePayPayment

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52. Which of the following Messages framework classes is used to display a dynamically-generated list of stickers. which is capable of drag-and-drop functionality?

MSSticker

MSStickerBrowserView

MSStickerBrowserViewController

MSStickerView

Answer

Correct Answer: MSStickerBrowserView

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53. Which of the following classes handles the editable content of a notification?

UNMutableNotif‌icationContent

UNNotif‌icationContent

UNNotif‌icationAttachment

UNNotif‌icationSound

Answer

Correct Answer: UNMutableNotif‌icationContent

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54. Which of the following core extensions of Intents framework represents the entry point for an Intents extension?

INIntentHlandlerProviding

INExtension

INIntentResponse

INIntentl-landlingStatus

Answer

Correct Answer: INExtension

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55. Which of the following classes handles the communication between a user and an app involving the intent object?

lNExtension

INlntent

lNlntentResponse

lNInteraction

Answer

Correct Answer: lNInteraction

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56. Sliced apps are supported by devices running:

iOS 7.0 and higher.

iOS 8.0 and higher.

iOS 9.0 and higher.

iOS 10.0 and higher.

Answer

Correct Answer: iOS 9.0 and higher.

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57. Which of the following App Extension points handle tasks related to supporting Siri integration with an iOS App?

iMessage (iOS)

lntents (iOS)

Finder Sync (macOS)

Custom Keyboard (iOS)

Answer

Correct Answer: lntents (iOS)

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58. Which of the following protocols defines the methods to handle the displaying and editing of content in the Today Widget?

NCWidgetSearchViewDelegate

NCWidgetListViewDelegate

NCWidgetProviding

NCWidgetListViewController

Answer

Correct Answer: NCWidgetListViewDelegate

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59. Which of the following primary ATS keys disables all ATS restrictions for media. which an app loads using the AV Foundation framework?

NSAllowsArbitraryLoads

NSAllowsArbitraryLoadsForMedia

NSAllowsArbitraryLoadsanebContent

NSAllowsLocalNetworking

Answer

Correct Answer: NSAllowsArbitraryLoadsForMedia

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60. Which of the following functions participates in the preparation of a session, using the SecureTransport API?

SSLCreateContext

SSLSetConnection

SSLSetCertificate

SSLHandshake

Answer

Correct Answer: SSLCreateContext

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61. Which of the following functions is used to provide the largest data packet, which the operating system guarantees, can be sent without fragmentation?

SSLCreateContext

SSLGetDatagramWriteSize

SSLSetCertificate

SSLGetMaxDatagramRecordSize

SSLWrite

Answer

Correct Answer: SSLGetDatagramWriteSize

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62.
Which of the given options is the correct sequence of steps for creating an object that supports background downloading?
1: Create the conf‌iguration object using the backgroundSessionConf‌igurationWithldentifier method of NSURLSessionConf‌iguration.

2: Set the discretionary property of the configuration object to YES, in case the app starts the transfer while in foreground.

3: Set the value of the conf‌iguration object's sessionSendsLaunchEvents property to YES.

4: Use the conf‌iguration object to create your NSURLSession object.

1234

4321

4231

1324

2314

3214

Answer

Correct Answer:

1324

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63. Grand Central Dispatch (GCD) provides functions to access several common dispatch queues in an application. Which of the following functions, when called from inside a block object, returns the queue, to which the block was originally submitted for queuing?

dispatch_get_global_queue

dispatch_get_current_queue

dispatch_get_main_queue

Answer

Correct Answer: dispatch_get_current_queue

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64. Which of the following classes defines an object, which specifies if the widget has content to display?

NCWidgetListViewControlIer

NCWidgetController

NCWidgetSearchViewController

NCWidgetSearchViewDelegate

Answer

Correct Answer: NCWidgetController

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65. Which of the following Messages framework classes is used to create and update messages?

MSConversation

MSMessagesAppViewController

MSMessageTemplateLayout

MSMessageLayout

MSSession

Answer

Correct Answer: MSSession

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66. Which of the following classes is used to find and monitor the available capture devices on a system (iphone/ipad)?

AVCaptureDeviceDiscoverySession

AVCaptureDeviceanutSource

AVCaptureDevice.Format

AVCaptureDevice.Format.FrameRateRange

Answer

Correct Answer: AVCaptureDevice.Format.FrameRateRange

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67. Which of the following class objects is used to perform certain tasks, in response of a delivered notification?

UNTextlnputNotificationAction

UNNotif‌icationAction

UNNotif‌icationCategory

UNPushNotif‌icationTrigger

UNTextlnputNotificationResponse

Answer

Correct Answer: UNNotif‌icationAction

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68. Which of the following methods manages the execution of work items in a queue?

DispatchQueue

DispatchWorkltem

DispatchSource

DispatchGroup

Answer

Correct Answer: DispatchQueue

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69. The INGetCarLockStatuslntent class in SiriKit is inherited from which class?

NSObject

NSObjectProtocol

lNlntent

INIntentResponse

INActivateCarSignallntent

Answer

Correct Answer: lNlntent

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70. Which of the following protocols is used to present custom content in the Siri and Maps interfaces?

lNCarCommandsDomainHanding

lNGetCarLockStatuslntentHandling

INSetCarLockStatuslntentHandling

lNGetCarPowerLevelStatuslntentHandling

INUlHostedViewControlIing

Answer

Correct Answer: INUlHostedViewControlIing

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71. In iOS1O CodeData, NSPersistentContainer uses a new class to describe the conf‌iguration information to pass to NSPersistentStoreCoordinator. while adding a persistent store. That class is:

NSPersistentStoreCoordinator

NSManagedObjectContext

NSPersistentContainer

NSPersistentStoreDescription

Answer

Correct Answer: NSPersistentStoreDescription

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72. In Sirikit, which of the following protocols is used to get the current status of a car

lNCarCommandsDomainHandling

INGetCarLockStatusIntentHandling

INSetCarLockStatuslntentHandling

lNGetCarPowerLevelStatuslntentI'landling

Answer

Correct Answer: INGetCarLockStatusIntentHandling

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73. Which of the following classes in the CallKit framework declares a programmatic interface for objects that represent a telephony action?

CXCallAction

CXAnswerCalIAction

CXCaII

CXAction

Answer

Correct Answer: CXAction

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74. Which of the following types of queues is provided and managed by Grand Central Dispatch (GCD), using which, an app can submit tasks, in the form of block objects?

LILO

FILO

LIFO

FIFO

Answer

Correct Answer: FIFO

Note: This Question is unanswered, help us to find answer for this one

75. Which of the following VOIP protocols manages the searching of a user

lNCallsDomainHandling

lNSearchCallHistorylntentHandling

INSearchCallHistorylntent

INStartAudioCallIntentHandling

Answer

Correct Answer: lNSearchCallHistorylntentHandling

Note: This Question is unanswered, help us to find answer for this one

76.
If you want to rotate an object using Core Animation, in radians, in the z axis, which of the following key paths of a layer’s CATransform3D matrix will you use?

rotation

rotation.xy

rotation.x

rotation.y

rotation.z

Answer

Correct Answer: rotation

Note: This Question is unanswered, help us to find answer for this one

77.
What happens if Xcode is not able to find a file or folder at the path defined for it in the project?

Xcode skips the file or the folder and continues execution.

Xcode gives an alert with a description of the missing file.

Xcode displays the item in red in the project window.

Answer

Correct Answer: Xcode displays the item in red in the project window.

Note: This Question is unanswered, help us to find answer for this one

78.
Which of the following statements is correct regarding functions fopen and open in generic C?

fopen returns an error if the file does exist.

fopen does not automatically create the file if it does not exist.

open returns an error if the file does exist.

open returns a file descriptor.

Answer

Correct Answer: open returns an error if the file does exist.

Note: This Question is unanswered, help us to find answer for this one

79.
What is the function of the Code Sense feature in Xcode?

Code Sense helps in switching between different circumstances such as development or release.

Code Sense maintains an index that contains important information for your project.

Code Sense creates a cache for the files which are being used frequently.

Code Sense maintains an index of files used in a project.

Code sense is the code completion feature helpful in avoiding typing and syntax errors.

Answer

Correct Answer: Code Sense helps in switching between different circumstances such as development or release.

Note: This Question is unanswered, help us to find answer for this one

80.
If the code is written using the Core Foundation and Foundation macros, the simplest way to create strings files is:

Using an option in the Preferences panel of Interface Builder.

By merging the comments from the individual entries into one comment string.

By unlocking all connections.

By using the genstrings command-line tool.

Answer

Correct Answer: By using the genstrings command-line tool.

Note: This Question is unanswered, help us to find answer for this one

81.
What method definition do if the value of the accessed counter is 0? - (void)discardContentIfPossible

It will discard the contents of the object because the counter is 0.

It will not discard the contents of the object because the counter is required to be above 0.

It will not discard the content of the object as a negative counter value is required.

None of the above

Answer

Correct Answer: It will discard the contents of the object because the counter is 0.

Note: This Question is unanswered, help us to find answer for this one

82.
Which Core Audio Service framework is used to record, play back, pause, loop, and synchronize audio in iPhone OS 4.0?

Audio Queue

Music Sequencing Services

Core Audio Clock

System Sound Services

Answer

Correct Answer: Audio Queue

Note: This Question is unanswered, help us to find answer for this one

83.
What will the hitTest: object of the CALayer class return if the point lies outside the receiver's bounds rectangle?

nil

true

false

None of the above

Answer

Correct Answer: nil

Note: This Question is unanswered, help us to find answer for this one

84.
Apple's implementation of HTTP Live Streaming supports DRM (Digital rights management).

True

False

Answer

Correct Answer: False

Note: This Question is unanswered, help us to find answer for this one

85.
You want to animate a layer's opacity to 0 while moving it further away in the layer. Which of the following code snippets will you use?

theLayer.opacity=0.0; theLayer.zPosition=0;

theLayer.opacity=0.0; theLayer.zPosition= -100;

theLayer.opacity=0.0; theLayer.zPosition=100;

theLayer.opacity=1.0; theLayer.zPosition=0;

Answer

Correct Answer: theLayer.opacity=0.0; theLayer.zPosition= -100;

Note: This Question is unanswered, help us to find answer for this one

86.
Which properties of the UIImage class are not in use after iOS 4.2?

imageOrientation

size

leftCapWidth

topCapHeight

Answer

Correct Answer: leftCapWidth

Note: This Question is unanswered, help us to find answer for this one

87.
Which part of the HTTP Live Streaming is responsible for taking input streams of media and encoding them digitally?

Server component

Distribution component

Client software

None of the above

Answer

Correct Answer: Server component

Note: This Question is unanswered, help us to find answer for this one

88.
Which defined types is a dynamic object type in Objective-C?

Class

SEL

BOOL

Answer

Correct Answer: id

Note: This Question is unanswered, help us to find answer for this one

89.
Which of the following terms are related to Memory Management in Objective-C?

alloc

mutableCopy

delete

release

Answer

Correct Answer: alloc

Note: This Question is unanswered, help us to find answer for this one

90.
Which of the following is NOT a parameter of function SecKeyDecrypt
of the class SecCertificate in iPhone OS 4.0?

key

padding

cipherText

certificate

Answer

Correct Answer: certificate

Note: This Question is unanswered, help us to find answer for this one

91.
Which of the following properties of ADBannerView class are readonly?

bannerLoaded

currentContentSizeIdentifier

bannerViewActionInProgress

delegate

requiredContentSizeIdentifiers

Answer

Correct Answer: bannerLoaded

Note: This Question is unanswered, help us to find answer for this one

92.
Which of the following is NOT the default behavior of an audio
session in iPhone OS?

Playback is disabled and recording is enabled.

When you move the Ring/Slient switch to the “silent” position, your audio is silenced.

When you press the Sleep/Wake button to lock the screen, or when the Auto-Lock period expires, your audio is silenced.

When your audio starts, other audio on the device – such as iPod audio that was already playing – is silenced.

Answer

Correct Answer: Playback is disabled and recording is enabled.

Note: This Question is unanswered, help us to find answer for this one

93.
Which Audio Toolbox framework file defines an interface for reading
and writing audio data in files in iPhone OS 4.0?

AudioConverter.h

AudioFile.h

AudioFileStream.h

AudioServices.h

Answer

Correct Answer: AudioFile.h

Note: This Question is unanswered, help us to find answer for this one

94.
What is the functionality of the beta parameter of function
catlas_caxpby in class cblas?

Input vector X

Input vectory Y

Scaling factor for X

Scaling factor for Y

Answer

Correct Answer: Scaling factor for Y

Note: This Question is unanswered, help us to find answer for this one

95.
The genstrings tool can parse _____.

C files with .c filename extension.

Objective-C files with .m fiename extension.

Java code files with .java filename extension.

Nib files with any file name extension.

Answer

Correct Answer: C files with .c filename extension.

Note: This Question is unanswered, help us to find answer for this one

96.
What is the data type of extendStart parameter of function
CGShadingCreateAxial of class CGShading?

CGFloat

CGPoint

bool

CGFunctionRef

int

Answer

Correct Answer: bool

Note: This Question is unanswered, help us to find answer for this one

97.
Using the following function, what will you get from the default
database?

NSUserDefaults defs = [NSUserDefaults standardUserDefaults];
NSArray languages = [defs objectForKey:@"AppleLanguages"];
NSString *preferredLang = [languages objectAtIndex:0];

The list of preferred languages.

The user's preferred language

The user’s default language

The list of languages supported by the application.

Answer

Correct Answer: The list of preferred languages.

Note: This Question is unanswered, help us to find answer for this one

98.
Which symbol is used as a syntactic marker for blocks of code in
iPhone OS 4.0?

Answer

Correct Answer: ^

Note: This Question is unanswered, help us to find answer for this one

99.
Which of the following need to be modified while localizing an
application?

Nib files (windows, views, menus)

Static text

Icons and graphics

Dynamic text generated by your program.

Answer

Correct Answer: Nib files (windows, views, menus)

Note: This Question is unanswered, help us to find answer for this one

100.
Which of the following statements regarding Objective-C are correct?

In Objective-C, the keyword for NULL is nil.

In Objective-C, #import and #include compiler directives carry out the same operations.

In Objective-C, for the object-oriented constructs (such as method return values), id is the default data type.

The keyword nil has an id with a value of 0.

Answer

Correct Answer: In Objective-C, the keyword for NULL is nil.

Note: This Question is unanswered, help us to find answer for this one

101.
Which of the following reasons will return a value of NO for the
instance method startVideoCapture of class
UIImagePickerController?

Movie capture is already in progress.

The device does not support movie capture

The device is out of disk space.

All of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

102.
What is the return value of SecRandomCopyBytes function of
SecRandom class in iPhone OS 4.0 if the function completes
successfully?

-1

true

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

103.
What is the datatype of the parameter inValidBitsPerChannel for the
function CalculateLPCMFlags in CoreAudioTypes class in iPhone OS
4.0?

UInt32

bool

Float32

UInt64

Answer

Correct Answer: UInt32

Note: This Question is unanswered, help us to find answer for this one

104.
Which of the following directives are used to declare and define
classes, categories, and protocols?

@interface

@implementation

@protocol

@class

@end

Answer

Correct Answer: @interface

Note: This Question is unanswered, help us to find answer for this one

105.
What is the value type of UTTypeConformsTo key of uniform type
identifier for iPhone OS 4.0?

array of dictionaries

array of strings

string

dictionary

integer

Answer

Correct Answer: array of strings

Note: This Question is unanswered, help us to find answer for this one

106.
Which of the following methods is used for the purpose of creating
your view objects in memory management?

Initialization methods

loadView

viewDidLoad

dealloc

Answer

Correct Answer: loadView

Note: This Question is unanswered, help us to find answer for this one

107.
While opening Nib files, which of the following should not be ignored?

Objects in a Nib file typically have connections between them that should not be broken.

If Objects in a Nib file have broken connections, they should not be restored.

The size of the files.

none of the above.

Answer

Correct Answer: Objects in a Nib file typically have connections between them that should not be broken.

Note: This Question is unanswered, help us to find answer for this one

108.
Which of the following OpenGL ES objects is a simple 2D graphics
image in a specified format?

texture

buffer

shaders

renderbuffer

framebuffers

Answer

Correct Answer: renderbuffer

Note: This Question is unanswered, help us to find answer for this one

109.
When you send an object a retain message in Memory Management
using Objective-C, what will happen?

Its retain count is incremented by 1.

Its retain count is decremented by 1.

Its retain count remains same

Its retain count is set to 0.

Answer

Correct Answer: Its retain count is incremented by 1.

Note: This Question is unanswered, help us to find answer for this one

110.
Consider the following code with 2 alternatives of vector operator for
OpenGL ES:
highp float f0,f1;
highp vec4 v0, v1;
Alternative 1: v0 = (v1f0)f1;
Alternative 2: v0 = v1 * (f0 * f1);
Which alternative demonstrates proper use of vector operations?

Alternative 1

Alternative 2

Both alternatives demonstrate proper use of vector operations.

Answer

Correct Answer: Alternative 2

Note: This Question is unanswered, help us to find answer for this one

111.
What will be the return value of CFHTTPMessageApplyCredentials
function of CFHTTPMessage class if the authentication is
successful?

TRUE

FALSE

nil

Answer

Correct Answer: TRUE

Note: This Question is unanswered, help us to find answer for this one

112.
Which of the following types of audio files has NO size restriction?

AIFF

WAVE

CAF

All of the above have file size restrictions.

Answer

Correct Answer: CAF

Note: This Question is unanswered, help us to find answer for this one

113.
What are universal binaries in Xcode?

These are executable files that can contain code and data for more than one architecture.

These are file references which are generated by the target, such as an application

These are indexes that contain symbolic information for your project.

These are used to specify build location settings.

Answer

Correct Answer: These are executable files that can contain code and data for more than one architecture.

Note: This Question is unanswered, help us to find answer for this one

114.
Which Core Audio Services framework handles positional and lowlatency audio services in iPHone OS 4.0?

Audio Toolbox

Audio Unit

AV Foundation

Core Audio

OpenAL

Answer

Correct Answer: OpenAL

Note: This Question is unanswered, help us to find answer for this one

115.
What will be the value of the clockwise parameter of the
CGContextAddArc function of the CGContext class if you want to
create a counterclockwise arc?

True

False

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

116.
Which of the following are new features to have been introduced in
iPhone OS 4.0?

Multitasking

Apple Push Notification Service

Local Notification

Gesture Recognizers

Answer

Correct Answer: Multitasking

Note: This Question is unanswered, help us to find answer for this one

117.
When your session becomes active, which of the following iPhone
OS 4.0 audio session categories allows other audio to continue
playing?

AVAudioSessionCategoryAmbient

AVAudioSessionCategorySoloAmbient

AVAudioSessionCategoryPlayback

AVAudioSessionCategoryRecord

Answer

Correct Answer: AVAudioSessionCategoryAmbient

Note: This Question is unanswered, help us to find answer for this one

118.
What will be the return value of function
ABPersonComparePeopleByName when person1 goes before
person2 in class ABPersonComparePeopleByName in iPhone OS
4.0?

kCFCompareLessThan

kCFCompareEqualTo

kCFCompareGreaterThan

None of the above

Answer

Correct Answer: kCFCompareLessThan

Note: This Question is unanswered, help us to find answer for this one

119.
Which of the following are the Derivative types defined in ObjectiveC?

short

long

long long

int

Answer

Correct Answer: short

Note: This Question is unanswered, help us to find answer for this one

120.
What is the default setting to refer to file locations in your Xcode
project?

Relative to Build Product

Relative to Project

Relative to Enclosing Group

Relative to <source path>

Absolute Path

Answer

Correct Answer: Relative to Enclosing Group

Note: This Question is unanswered, help us to find answer for this one

121.
What type of value is assigned to the loc-args child property of alert
property in an Apple Push Notification?

string

array of strings

number

dictionary

Answer

Correct Answer: array of strings

Note: This Question is unanswered, help us to find answer for this one

122.
Which of the following properties of the GKSession class is readonly?

available

delegate

displayName

peerID

sessionID

Answer

Correct Answer: displayName

Note: This Question is unanswered, help us to find answer for this one

123.
Which of the following are NOT a property of
UIImagePickerController class in iPhone OS 4.0?

cameraCaptureMode

mediaTypes

startVideoCapture

takePicture

videoQuality

Answer

Correct Answer: startVideoCapture

Note: This Question is unanswered, help us to find answer for this one

124.
What is the default value of the remoteParticipantVolume property of
the class GKVoiceChatService in iPhone OS 4.0?

0.0

0.5

1.0

5.0

Answer

Correct Answer: 1.0

Note: This Question is unanswered, help us to find answer for this one

125.
When the genstrings tool discovers a key string used more than once
in a single strings file, it:

deletes the comments from the individual entries and leaves one comment string without generating a warning.

merges the comments from the individual entries into one comment string and generates a warning

differentiates the comments from the individual entries into various strings and generates a warning.

None of the above

Answer

Correct Answer: merges the comments from the individual entries into one comment string and generates a warning

Note: This Question is unanswered, help us to find answer for this one

126.
Which of the following iTunes application URLs are NOT valid?

http://itunes.com/apps/sega

http://itunes.com/apps/TomandJerry

http://itunes.com/apps/Tom&Jerry

http://itunes.com/apps/brainchallengeTM

Answer

Correct Answer: http://itunes.com/apps/TomandJerry

Note: This Question is unanswered, help us to find answer for this one

127.
Which of the following is the correct syntax for declaring a class in
Objective-C?

@interface ClassName : ItsSuperclass { instance variable declarations } method declarations @end

@implementation ClassName : ItsSuperclass { instance variable declarations } method declarations @end

@class ClassName : ItsSuperclass { instance variable declarations } method declarations @end

All are correct

Answer

Correct Answer: @interface ClassName : ItsSuperclass { instance variable declarations } method declarations @end

Note: This Question is unanswered, help us to find answer for this one

128.
What is the datatype of the clockwise parameter of the
CGContextAddArc function of the CGContext class?

bool

int

CGFloat

CGContextRef

Answer

Correct Answer: int

Note: This Question is unanswered, help us to find answer for this one

129.
How much time in seconds will it take to display an animation if you
have 60 images using UIImageView class for the property
animationDuration?

Answer

Correct Answer: 2

Note: This Question is unanswered, help us to find answer for this one

130.
When using a Cocoa framework, what will all ControlEvents method
of UIControl class return in case it fails to create the object?

failure to create

no object to return

status code 420

nil

Answer

Correct Answer: nil

Note: This Question is unanswered, help us to find answer for this one

131.
Which of the following properties of the UIImage class affects the way
the image data is displayed when drawn?

CGImage

leftCapWidth

imageOrientation

scale

Answer

Correct Answer: imageOrientation

Note: This Question is unanswered, help us to find answer for this one

132.
What is the default value of allowsEditing property of
UIImagePickerController class in iPhone OS 4.0?

YES

enable

disable

Answer

Correct Answer: NO

Note: This Question is unanswered, help us to find answer for this one

133.
What is the return value of function CGColorGetAlpha of class
CGColor?

An alpha intensity value in the range[-1, 1]

An alpha intensity value in the range[-0.5, 0.5]

An alpha intensity value in the range[0, 1]

An alpha intensity value in the range[1, 5]

Answer

Correct Answer: An alpha intensity value in the range[0, 1]

Note: This Question is unanswered, help us to find answer for this one

134.
Before editing the Nibs, one should:

Unlock all connections.

Lock all connections.

Break all connections.

None of the above

Answer

Correct Answer: Lock all connections.

Note: This Question is unanswered, help us to find answer for this one

135.
What is the purpose of active executable in an Xcode project?

To specify which program is launched and how, when you run or debug from within Xcode.

To select the appropriate configuration of the active target and each target it depends upon while building.

To define different build configurations for different cirumstances such as development or release.

To build products for Multiple Platforms.

Answer

Correct Answer: To specify which program is launched and how, when you run or debug from within Xcode.

Note: This Question is unanswered, help us to find answer for this one

136.
Which of the following animation class provides simple interpolation
between values for a layer property?

CABasicAnimation

CAKeyframeAnimation

CATransition

CAAnimationGroup

Answer

Correct Answer: CABasicAnimation

Note: This Question is unanswered, help us to find answer for this one

137.
What is the default value of the borderColor property of the CALayer
class?

nil

opaque black

dark black

Answer

Correct Answer: opaque black

Note: This Question is unanswered, help us to find answer for this one

138.
By default, is the search interface visible in the
UISearchDisplayController class?

Yes

Answer

Correct Answer: No

Note: This Question is unanswered, help us to find answer for this one

139.
Which of the following properties of the CAKeyframeAnimation class
represents an optional array of NSNumber objects that define the
duration of each keyframe segment?

path

keyTimes

rotationmode

continuityValues

Answer

Correct Answer: keyTimes

Note: This Question is unanswered, help us to find answer for this one

140.
Which of the following languages can be used to write the code for
Xcode projects?

C++

Objective-C

Objective-C++

Java

Answer

Correct Answer: C

Note: This Question is unanswered, help us to find answer for this one

141.
Which of the following copy functions will you use in Objective-C to
create an entirely new compound object?

Shallow Copy

Deep Copy

Both a and b

Answer

Correct Answer: Deep Copy

Note: This Question is unanswered, help us to find answer for this one

142.
; "> What will happen if your filename ExampleImage.png is being called
as follows:
[UIImage imageNamed:@”ExampleImage.PNG”]

The image file will load in the simulator but not in iPhone OS 4.0 because it is case sensitive.

The image file will load in iPhone OS 4.0 but not in the simulator because it is case sensitive.

The file will load in both the simulator and iPhone OS 4.0 because they are both case insensitive.

Answer

Correct Answer: The image file will load in the simulator but not in iPhone OS 4.0 because it is case sensitive.

Note: This Question is unanswered, help us to find answer for this one

143.
What is the default value of the fontSize property of the CATextLayer
class?

8.0

12.0

18.0

36.0

Answer

Correct Answer: 36.0

Note: This Question is unanswered, help us to find answer for this one

144.
In a Cocoa framework, how do the UIKit classes UIControl,
UITextField, UIButton, and UITableView deliver their services?

Off the shelf

Behind the scenes

Generically

Through delegation and notification

Answer

Correct Answer: Off the shelf

Note: This Question is unanswered, help us to find answer for this one

145.
Which of the following debugging tasks are provided by Xcode to find
and squash bugs in your code?

Add and set breakpoints.

View your call stack per thread.

View the value of variables by hovering the mouse pointer over them.

Execute a single line of code.

All of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

146.
Locking all connections before editing the Nib files can be achieved
by using:

An option in the Start Menu

An option in the Preferences panel of Interface Builder.

An option in the Preferences panel of Language Directory.

Any of the above

Answer

Correct Answer: An option in the Preferences panel of Interface Builder.

Note: This Question is unanswered, help us to find answer for this one

147.
Which of the following debugging tasks are provided by Xcode to find and squash bugs in your code?

Add and set breakpoints.

View your call stack per thread.

View the value of variables by hovering the mouse pointer over them.

Execute a single line of code.

Answer

Correct Answer: Execute a single line of code.
Execute a single line of code.

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

148.
Which of the following programmatically avoids auto-lock?

[[UIApplication sharedApplication] setIdleTimerDisabled:YES];

[[UIDevice currentDevice] setIdleTimerDisabled:YES];

[[UIApplication sharedApplication] setAutoLock:NO];

[[UIDevice currentDevice] setAutoLock:NO];

Answer

Correct Answer: [[UIApplication sharedApplication] setIdleTimerDisabled:YES];

Note: This Question is unanswered, help us to find answer for this one

149.
Which of the following are true regarding the usage of NSinteger and int in iOS?

Only NSinterger is used in iOS.

NSInteger is defined as an int; it's used when passing a value as an argument to a function or returning a value from a function when building a 32-bit app and for 64-bit apps.

NSinteger and int can be used interchangeably.

NSInteger is a type definition that is used to describe an integer; it is equivalent to int.

Answer

Correct Answer: NSInteger is defined as an int; it's used when passing a value as an argument to a function or returning a value from a function when building a 32-bit app and for 64-bit apps.

Note: This Question is unanswered, help us to find answer for this one

150.
What would be examples of troubleshooting steps to do, when Xcode displays a launching remote program error?

Restart Xcode

Reopen project file

Change application bundle ID

All of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

151.
Which of the following is a valid JSON string?

{ "firstName": "John", "lastName": "Smith", "age": 25, "address": { "streetAddress": "21 2nd Street", "city": "New York", "state": "NY", "postalCode": "10021" }, "phoneNumber": [ { "type": "home", "number": "212 555-1234" }, { "type": "fax", "number": "646 555-4567" } ] }

{ "firstName": "John", "lastName": "Smith", "age": 25, "address": { "streetAddress": "21 2nd Street", "city": "New York", "state": "NY", "postalCode": "10021" }, "phoneNumber": { { "type": "home", "number": "212 555-1234" }, { "type": "fax", "number": "646 555-4567" } } }

{ "firstName": 'John', "lastName": 'Smith', "age": 25, "address": { "streetAddress": '21 2nd Street', "city": 'New York', "state": 'NY', "postalCode": 10021 }, "phoneNumber": [ { "type": 'home', "number": 212 555-1234 }, { "type": 'fax', "number": 646 555-4567 } ] }

{ "firstName": "John", "lastName": "Smith", "age": 25, "address": [ "streetAddress": "21 2nd Street", "city": "New York", "state": "NY", "postalCode": "10021" ], "phoneNumber": [ { "type": "home", "number": "212 555-1234" }, { "type": "fax", "number": "646 555-4567" } ] }

Answer

Correct Answer: { "firstName": "John", "lastName": "Smith", "age": 25, "address": [ "streetAddress": "21 2nd Street", "city": "New York", "state": "NY", "postalCode": "10021" ], "phoneNumber": [ { "type": "home", "number": "212 555-1234" }, { "type": "fax", "number": "646 555-4567" } ] }

Note: This Question is unanswered, help us to find answer for this one

152.
Which of the following will create a singleton class that is compatible with ARC?

+ (MyClass *)sharedInstance { static MyClass *sharedInstance = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance = [[MyClass alloc] init]; }); return sharedInstance; }

+ (id)sharedInstance { static MyClass *sharedInstance = nil; @synchronized(self) { if(sharedInstance == nil) sharedInstance = [[super allocWithZone:NULL] init]; } return sharedInstance; }

+ (MyClass *)sharedClass { static MyClass *sharedInstance = nil; @synchronized(self) { static dispatch_once_t onceToken; } dispatch_once(&onceToken, ^{ sharedInstance = [[MyClass alloc] init]; }); return sharedInstance; }

It is not possible to create a singleton class in Objective-C.

Answer

Correct Answer: + (MyClass *)sharedInstance { static MyClass *sharedInstance = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance = [[MyClass alloc] init]; }); return sharedInstance; }

Note: This Question is unanswered, help us to find answer for this one

153.
Which of the following will get the position of UIView within the entire UIWindow?

convertPoint:toView:

convertRect:toView:

pointInside:withEvent:

view.window.frame.origin

Answer

Correct Answer: convertPoint:toView:

Note: This Question is unanswered, help us to find answer for this one

154.
How can an alert message/pop-up dialog box be shown in iOS?

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"test message" message:@"test message for application." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show];

UIAlertView *alert = [[UIAlertView mess] initWithTitle:@"test message" message:@"Test Message for application." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; [alert release];

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"test message" message:@"test message for application." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert display];

UIAlertView *alert = [[UIAlertView mess] initWithTitle:@"test message" message:@"test message for application." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert display]; [alert release];

Answer

Correct Answer: UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"test message" message:@"test message for application." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show];

Note: This Question is unanswered, help us to find answer for this one

155.
Which of the following compares NSString while ignoring case?

if( [@"Some String" caseInsensitiveCompare:@"some string"] == NSOrderedSame ) { }

[someString compare:otherString options:NSCaseInsensitiveSearch];

if( [@"Some String" isEqualToString:@"some string"] == NSOrderedSame ) { }

None of these.

Answer

Correct Answer: if( [@"Some String" caseInsensitiveCompare:@"some string"] == NSOrderedSame ) { }

Note: This Question is unanswered, help us to find answer for this one

156.
Which of the following will create a singleton class that is compatible with ARC?

+ (id)sharedInstance { static MyClass *sharedInstance = nil; @synchronized(self) { if(sharedInstance == nil) sharedInstance = [[super allocWithZone:NULL] init]; } return sharedInstance; }

It is not possible to create a singleton class in Objective-C.

its MCQS-MA TYPE

Answer

Correct Answer: its MCQS-MA TYPE

Note: This Question is unanswered, help us to find answer for this one

157.
What will happen when the tableView:accessoryButtonTappedForRowWithIndexPath UITableViewDelegate method is called, in a case where there is a custom UIControl subclass in the standard accessory view?

It will work properly, as in the standard accessory view.

The delegate method will not be called, because it is a custom control view.

The application will crash at calling the delegate method.

None of the above.

Answer

Correct Answer: The delegate method will not be called, because it is a custom control view.

Note: This Question is unanswered, help us to find answer for this one

158.
Which of the following is the correct way to vertically center the UITextField text?

textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter

textField.contentAlignment = UIControlContentVerticalAlignmentCenter

textField.contentVerticalAlignment = UIControlVerticalAlignmentCenter

textField.contentVerticalAlignment = UIContentVerticalAlignmentCenter

Answer

Correct Answer: textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter

Note: This Question is unanswered, help us to find answer for this one

159.
The iPhone Simulator can be found at:

~/Library/Application Support/iPhone Simulator/

Macintosh HD/Library/Application Support/iPhone Simulator/

~/Library/MobileDevice/iPhone Simulator/

Macintosh HD/Developer/Tools/iPhone Simulator/

Answer

Correct Answer: ~/Library/Application Support/iPhone Simulator/

Note: This Question is unanswered, help us to find answer for this one

160.
Select the following statements that are true?

The iPhone SDK supports base64 encoding and decoding.

The iPhone SDK does not support base64 encoding and decoding.

The iPhone SDK needs to add a special library to do base64 encoding and decoding.

The iPhone SDK supports base64 decoding only.

Answer

Correct Answer: The iPhone SDK needs to add a special library to do base64 encoding and decoding.

Note: This Question is unanswered, help us to find answer for this one

161.
Which method is used to dismiss keyboard for UITextField?

[textField becomesFirstResponder];

[textField dismissKeyboard];

[textfield resignFirstResponder];

[textField shouldReturn];

Answer

Correct Answer: [textfield resignFirstResponder];

Note: This Question is unanswered, help us to find answer for this one

162.
Which CATransform3D matrix cell is responsible for perspective transforms?

transform.m14

transform.43

transform.m34

transform.m24

Answer

Correct Answer: transform.m34

Note: This Question is unanswered, help us to find answer for this one

163.
Which of the following is the correct way to get the screen height and width in iOS ?

[[UIScreen mainScreen] bounds];

[[UIScreen mainScreen]Frame];

[[UIScreen mainScreen]rect];

[[UIScreen mainScreen] bounds].size.height and [[UIScreen mainScreen] bounds].size.width;

Answer

Correct Answer: [[UIScreen mainScreen] bounds].size.height and [[UIScreen mainScreen] bounds].size.width;

Note: This Question is unanswered, help us to find answer for this one

164.
Where does Xcode place its build products and other intermediaries/temporary files?

In the Derived Data folder

In the Archives folder

In the User Data folder

In the application Document folder

Answer

Correct Answer: In the Derived Data folder

Note: This Question is unanswered, help us to find answer for this one

165.
Which of the following will make an iPhone app return its own version number?

[NSString stringWithFormat:@"Version %@ (%@)", [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"], ]

[NSString stringWithFormat:@"Version %@ (%@)", [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"], kRevisionNumber]

[NSString stringWithFormat:@"Version ", [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"], kRevisionNumber]

[NSString stringWithFormat:@"Version %@ (%@)", [[[NSBundle mainBundle] Dictionary] objectForKey:@"CFBundleVersion"], kRevisionNumber]

Answer

Correct Answer: [NSString stringWithFormat:@"Version %@ (%@)", [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"], kRevisionNumber]

Note: This Question is unanswered, help us to find answer for this one

166.
Which of the following changes the color of the pagination dots of UIPageControl?

setPageIndicatorTintColor

setCurrentPageIndicatorTintColor

setColor

A custom page control view implementation

Answer

Correct Answer: setPageIndicatorTintColor

Note: This Question is unanswered, help us to find answer for this one

167.
Why does the error, "EXC_BAD_ACCESS" occur?

Running instruments and checking for leaks

Trying to access released objects

Both A and B are correct.

None of above are correct.

Answer

Correct Answer: Trying to access released objects

Note: This Question is unanswered, help us to find answer for this one

168.
Which of the following is not used to find an object contained in NSMutableArray?

"[myArray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@""self == %@"", @""New""]];"

[myArray indexOfObject:@"New"];

[myArray containObject:@"New"];

[myArray objectPresent];

Answer

Correct Answer: [myArray objectPresent];

Note: This Question is unanswered, help us to find answer for this one

169.
Which of the following will print the value of a Boolean flag in NSLog?

NSLog(@"Bool value: %@",value)

NSLog(@"Bool value: %d",value)

NSLog(@"Bool value: %d.d",value)

None of the above

Answer

Correct Answer: NSLog(@"Bool value: %d",value)

Note: This Question is unanswered, help us to find answer for this one

170.
What is true about Grand Central Dispatch(GCD) and NSOperation?

GCD is a low level C- based API and NSOperation is Objective –C class

NSOperation is low-level C-based API and GCD is Objective – C classes.

Both are Objective – C classes

None of the above

Answer

Correct Answer: GCD is a low level C- based API and NSOperation is Objective –C class

Note: This Question is unanswered, help us to find answer for this one

171.
Which of the following code samples will declare a variable inside a block in Objective-C?

Person *aPerson = nil; [participants enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { Person *participant = (Person*)obj; if ([participant.gender isEqualToString:@"M"]) { aPerson = participant; *stop = YES; } }]; return aPerson;

__block Person *aPerson = nil; [participants enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { Person *participant = (Person*)obj; if ([participant.gender isEqualToString:@"M"]) { aPerson = participant; *stop = YES; } }]; return aPerson;

[participants enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { Person *participant = (Person*)obj; Person *aPerson = nil; if ([participant.gender isEqualToString:@"M"]) { aPerson = participant; *stop = YES; } }]; return aPerson;

All of the above.

Answer

Correct Answer: [participants enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { Person *participant = (Person*)obj; Person *aPerson = nil; if ([participant.gender isEqualToString:@"M"]) { aPerson = participant; *stop = YES; } }]; return aPerson;

Note: This Question is unanswered, help us to find answer for this one

172.
Which of the following is not a valid MPVolumeView method?

- (CGRect)volumeThumbRectForBounds:(CGRect)bounds volumeSliderRect:(CGRect)rect value:(float)value

- (UIImage *)maximumVolumeSliderImageForState:(UIControlState)state

- (CGRect)routeButtonRectForBounds:(CGRect)bounds

- (void)setVolumeThumbImage:(UIImage *)image

Answer

Correct Answer: - (void)setVolumeThumbImage:(UIImage *)image

Note: This Question is unanswered, help us to find answer for this one

173.
What does a "__block" type specifier mean?

Modifications made with the variable marked with __block inside the block are not visible outside of it.

Modifications done with the variable marked with __block inside the block are also visible outside of it.

It makes the variable non-mutable within the block.

None of the above

Answer

Correct Answer: Modifications done with the variable marked with __block inside the block are also visible outside of it.

Note: This Question is unanswered, help us to find answer for this one

174.
Which of the following is not a valid MKAnnotationView property?

canShowCallout

draggable

dragState

None of these.

Answer

Correct Answer: None of these.

Note: This Question is unanswered, help us to find answer for this one

175.
Which of the following correctly describes when the - (void)viewDidUnload method is called?

When the application launches.

When any view appears.

When a view is released.

During low memory conditions when the view controller needs to release its view.

Answer

Correct Answer: When a view is released.

Note: This Question is unanswered, help us to find answer for this one

176.
What is the best way to show multiple lines text in the UILabel?

CGRect currentFrame = myLabel.frame; CGSize max = CGSizeMake(myLabel.frame.size.width, 500); label.font = [UIFont systemFontOfSize:13.0]; CGSize expected = [myString sizeWithFont:myLabel.font]; myLabel.numberOfLines = 0;

CGRect currentFrame = myLabel.frame; CGSize max = CGSizeMake(myLabel.frame.size.width, -1); CGSize expected = [myString sizeWithFont:myLabel.font]; myLabel.numberOfLines = -1;

myLabel.numberOfLines = 0; CGRect currentFrame = myLabel.frame; CGSize max = CGSizeMake(myLabel.frame.size.width, 500); CGSize expected = [myString sizeWithFont:myLabel.font constrainedToSize:max lineBreakMode:myLabel.lineBreakMode]; currentFrame.size.height = expected.height; myLabel.frame = currentFrame;

You have to use UITextView for this purpose, otherwise Apple will rejects your app submission

Answer

Correct Answer: myLabel.numberOfLines = 0; CGRect currentFrame = myLabel.frame; CGSize max = CGSizeMake(myLabel.frame.size.width, 500); CGSize expected = [myString sizeWithFont:myLabel.font constrainedToSize:max lineBreakMode:myLabel.lineBreakMode]; currentFrame.size.height = expected.height; myLabel.frame = currentFrame;

Note: This Question is unanswered, help us to find answer for this one

177.
Which one is the best resolution for the following error?

"A valid signing identity matching this profile could not be found in your keychain"

Installing the certificate file in your keychain

Renewing your provisioning profile

Installing the private key in your keychain

Renewing your Apple developer account.

Answer

Correct Answer: Renewing your provisioning profile

Note: This Question is unanswered, help us to find answer for this one

178.
Which method of Objective-C handles detecting the shake gesture on an iOS device?

+ (UIAccelerometer *)sharedAccelerometer

- (void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration

- (void) accelerometer:(UIAccelerometer *)accelerometer willAccelerate:(UIAcceleration *)acceleration

- (void) accelerometer:(UIAccelerometer *)accelerometer beginAccelerate:(UIAcceleration *)acceleration

Answer

Correct Answer: - (void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration

Note: This Question is unanswered, help us to find answer for this one

179.
What property in info.plist handles the association of file types in an iPhone application?

LSItemContentTypes

LSHandlerRank

CFBundleTypeName

CFBundleTypeRole

Answer

Correct Answer: LSItemContentTypes

Note: This Question is unanswered, help us to find answer for this one

180.
Which framework can be used to call SOAP web services in iOS applications?

gSOAP

ASIHTTP framework

wsdl2objc framework

None of these

Answer

Correct Answer: gSOAP

Note: This Question is unanswered, help us to find answer for this one

181.
Is it possible to set multiple architecture from Build Settings tab in Xcode for a project?

Yes

only in Xcode 4.5 or later

only in Xcode 4.5 or previous

Answer

Correct Answer: Yes

Note: This Question is unanswered, help us to find answer for this one

182.
When does this behavior usually happen?

"Xcode Message: finished running <my app>" on targeted device shows, but nothing happens

If the app was ran on earlier devices (3G or 3GS) and arm6 was not added in Require Device Capabilities.

If app was built and ran on version 3.2 or earlier of Xcode and arm7 was not added in Require Device Capabilities.

If Bundle Identifier used in the project is being used by another project

When some another application is already running on device

When the device is locked with a passcode

Answer

Correct Answer: If the app was ran on earlier devices (3G or 3GS) and arm6 was not added in Require Device Capabilities.

Note: This Question is unanswered, help us to find answer for this one

183.
Which property would be used to get the UDID of UIDevice on iOS?

[UIDevice UDIDString]

[UIDevice uniqueIdentifier]

-[UIDevice identifierForVendor]

None of these

Answer

Correct Answer: None of these

Note: This Question is unanswered, help us to find answer for this one

184.
What is the difference between assign and retain in Objective-C?

assign - Specifies that a copy of the object should be used for assignment. The previous value is sent a release message. retain - Specifies that the setter uses simple assignment. The previous value is sent a release message.

assign - Specifies that the setter uses simple assignment. This is the default. retain - Specifies that retain should be invoked on the object upon assignment. The previous value is sent a release message.

assign - Increases the count of an object by 1. Takes ownership of an object. retain - Decreases the retain count of an object by 1. Relinquishes ownership of an object.

assign - Makes a assign of an object, and returns it with retain count of 1. If you copy an object, you own the copy. retain - Specifies that a retain of the object should be used for assignment. The previous value is sent a release message.

Answer

Correct Answer: assign - Specifies that the setter uses simple assignment. This is the default. retain - Specifies that retain should be invoked on the object upon assignment. The previous value is sent a release message.

Note: This Question is unanswered, help us to find answer for this one

185.
How can an SMS be sent programmatically from the iPhone (iOS 4.0 or later)?

Using MFMessageComposeViewController

[[UIApplication sharedApplication] openURL: @"sms:PHONE-NUMBER"];

Both A &B are correct answers

The official SDK/Cocoa Touch doesn't allow sending SMSs programmatically

Answer

Correct Answer: Both A &B are correct answers

Note: This Question is unanswered, help us to find answer for this one

186.
Which of the following is best JSON library to be used in iOS applications

SBJSON

JSON kit

Touch JSON

None of these

Answer

Correct Answer: JSON kit

Note: This Question is unanswered, help us to find answer for this one

187.
What does EXC_BAD_ACCESS signal received mean in Xcode?

Due to warning in code

"Owning" the memory but forgetting to release

Testing on a device without registering UDID

Using incorrect delegate methods

Answer

Correct Answer: "Owning" the memory but forgetting to release

Note: This Question is unanswered, help us to find answer for this one

188.
Which of the following is the correct way to set the Navigation Bar Color of the Tab Bar Configure Menu?

"UINavigationController *navigationController; ... navigationController.navigationBar.tintColor = [UIColor blackColor];"

"UINavigationController *navigationController; ... navigationController.tintColor = [UIColor blackColor];"

"UINavigationController *navigationController; ... navigationController.color = [UIColor blackColor];"

"UINavigationController *navigationController; ... navigationController.navigationBar.Color = [UIColor blackColor];"

Answer

Correct Answer: "UINavigationController *navigationController; ... navigationController.navigationBar.tintColor = [UIColor blackColor];"

Note: This Question is unanswered, help us to find answer for this one

189.
Which of the following UILabel properties help adjust text within a UILabel?

lineBreakMode

adjustsFontSizeToFitWidth

numberOfLines

drawTextInRect:

Answer

Correct Answer: adjustsFontSizeToFitWidth

Note: This Question is unanswered, help us to find answer for this one

190.
Which of the following is the correct way to check whether the view controller view is loaded or visible?

if (viewController.isViewLoaded || tabbarController.view.window) { // viewController is visible }

if([[[self tabBarController] selectedViewController] isEqual:self]){ //we're in the active controller }else{ //we are not }

if (viewController.isLoaded && viewController.view.) { // viewController is visible }

if (viewController.isViewLoaded && viewController.view.window) { // viewController is visible }

Answer

Correct Answer: if (viewController.isViewLoaded && viewController.view.window) { // viewController is visible }

Note: This Question is unanswered, help us to find answer for this one

191.
Which of the following properties would be used to draw a shadow under UIView?

CGContextRestoreShadowState

CGContextRestoreGState

CGContextSetShadow();

CGContextshadowState

Answer

Correct Answer: CGContextSetShadow();

Note: This Question is unanswered, help us to find answer for this one

192.
Which of the following is the correct way to set UIButton's Highlight Tint color programmatically?

[button setColor:[UIColor grayColor]];

[button setTintColor:[UIColor grayColor]];

[button setColor:[UIColor grayColor]];

[button TintColor:[UIColor grayColor]];

Answer

Correct Answer: [button setTintColor:[UIColor grayColor]];

Note: This Question is unanswered, help us to find answer for this one

193.
Which one is true regarding integrating and using custom fonts in an iOS application?

Apple rejects the applications that use custom fonts.

Adding fonts to your app plist allows usage directly in the app.

There is no direct way to add fonts; third party APIs are the only way.

You can add fonts, but only if they are provided by Apple.

Answer

Correct Answer: Adding fonts to your app plist allows usage directly in the app.

Note: This Question is unanswered, help us to find answer for this one

194.
Is it possible to deploy beta build on any device?

Yes beta build can be deployed on any iOS device.

Beta build can be deployed only on devices that are included in Mobile Provision certificate while compiling build.

Beta Build can be deployed only on Simulators.

All of above

Answer

Correct Answer: Beta build can be deployed only on devices that are included in Mobile Provision certificate while compiling build.

Note: This Question is unanswered, help us to find answer for this one

195.
What could be the probable result if selector is unknown or undefined?

Causes memory leak

Causes application to terminate with error

Nothing will happen

None of above

Answer

Correct Answer: Causes application to terminate with error

Note: This Question is unanswered, help us to find answer for this one

196.
How can the application name of an iOS project be changed?

Change Bundle Display Name from info.plist

Rename Project

Change bundle identifier

Create a new project with New name

Answer

Correct Answer: Change Bundle Display Name from info.plist

Note: This Question is unanswered, help us to find answer for this one

197.
What is the difference between new and [[alloc]init] in iOS?

[[alloc]init] is used to create an object but new is not used to create an object.

Neither [[alloc]init] nor new is used for creating an object.

No difference. Both [[alloc]init] and new are used to create an object.

[[alloc]init] is not used to create object but new is used to an create object.

Answer

Correct Answer: No difference. Both [[alloc]init] and new are used to create an object.

Note: This Question is unanswered, help us to find answer for this one

198.
What will be output of following code?

NSLog(@"%.2f",[[UIDevice currentDevice].systemVersion floatValue]);

6.1.0

6.1.2

6.10

6.12

Answer

Correct Answer: 6.10

Note: This Question is unanswered, help us to find answer for this one

199.
Which of the following is the best practice to find active internet connection?

- (BOOL) connectedToInternet { Reachability *reachability = [Reachability reachabilityForInternetConnection]; NetworkStatus networkStatus = [reachability currentReachabilityStatus]; return !(networkStatus == NotReachable); }

- (BOOL) connectedToInternet { NSString *URLString = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://www.google.com"]]; return ( URLString != NULL ) ? YES : NO; }

- (BOOL) connectedToInternet { NSURL *URLString = [NSURL URLWithString:@"http://www.google.com"]; NSData *data = [NSData dataWithContentsOfURL:URLString]; if (data) return YES; else return NO; }

- (BOOL) connectedToInternet { NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL: [NSURL URLWithString:@"http://www.google.com/"]]; [request setHTTPMethod:@"HEAD"]; NSHTTPURLResponse *response; [NSURLConnection sendSynchronousRequest:request returningResponse:&response error: NULL]; return ([response statusCode] == 200) ? YES : NO; }

Answer

Correct Answer: - (BOOL) connectedToInternet { Reachability *reachability = [Reachability reachabilityForInternetConnection]; NetworkStatus networkStatus = [reachability currentReachabilityStatus]; return !(networkStatus == NotReachable); }

Note: This Question is unanswered, help us to find answer for this one

200.
What is the correct method to define a delegate object in an ARC Environment?

@property (nonatomic, weak) id <MyClassDelegate> delegate;

@property(nonatomic,retain) id <MyClassDelegate> delegate;

@property(nonatomic,weak) <MyClassDelegate> delegate;

@property(nonatomic, weak) NSObject *delegate;

Answer

Correct Answer: @property (nonatomic, weak) id <MyClassDelegate> delegate;

Note: This Question is unanswered, help us to find answer for this one

201.
Select which of the following is not UITableViewCellSelectionStyle values?

UITableViewCellSelectionStyleNone

UITableViewCellSelectionStyleBlue

UITableViewCellSelectionStyleLightGray

UITableViewCellSelectionStyletGray

Answer

Correct Answer: UITableViewCellSelectionStyleLightGray

Note: This Question is unanswered, help us to find answer for this one

202.
Which of the following is the best way to add a UIToolbar above keyboard?

-(void)keyboardWillShow:(NSNotification *)notification { [self.view addSubview:toolbar]; }

-(void)textFieldDidBeginEditing:(UITextField *)textField { [self.view addSubview:toolbar]; }

Always keep UIToolBar visible on screen.

-(void)keyboardWillHide:(NSNotification *)notification { [self.view addSubview:toolbar]; }

Answer

Correct Answer: -(void)keyboardWillShow:(NSNotification *)notification { [self.view addSubview:toolbar]; }

Note: This Question is unanswered, help us to find answer for this one

203.
Which of the following is not an Open Source Framework/Library?

MBProgressHUD

ASIHTTPRequest

RestKit

StoreKit

Answer

Correct Answer: StoreKit

Note: This Question is unanswered, help us to find answer for this one

204.
Which of the following font packages are supported by Cocoa-Touch?

.ttf (True Type Font)

.ttc (True Type font Collection)

.otf (Open Type Font)

.dFont (MAC OS X Data Fork Font)

Answer

Correct Answer: .ttf (True Type Font)

Note: This Question is unanswered, help us to find answer for this one

205.
Which of the following correctly sets an image on UIButton?

button.image = [UIImage imageNamed:@"button_img.png"];

button.imageView.image = [UIImage imageNamed:@"button_img.png"];

[button setImage:[UIImage imageNamed:@"button_img.png"] forState:UIControlStateNormal];

[button setImageView:[UIImage imageNamed:@"button_img.png"] forState:UIControlStateNormal];

Answer

Correct Answer: [button setImage:[UIImage imageNamed:@"button_img.png"] forState:UIControlStateNormal];

Note: This Question is unanswered, help us to find answer for this one

206.
Which of the following will set the font of UISegmentedControl?

UIFont *font = [UIFont boldSystemFontOfSize:12.0f]; NSDictionary *attributes = [NSDictionary dictionaryWithObject:font forKey:UITextAttributeFont]; [segmentedControl setTitleTextAttributes:attributes forState:UIControlStateNormal];

[[UISegmentedControl appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont fontWithName:@"STHeitiSC-Medium" size:13.0], UITextAttributeFont, nil] forState:UIControlStateNormal];

segmentedControl.transform = CGAffineTransformMakeScale(.6f, .6f);

None of these.

Answer

Correct Answer: UIFont *font = [UIFont boldSystemFontOfSize:12.0f]; NSDictionary *attributes = [NSDictionary dictionaryWithObject:font forKey:UITextAttributeFont]; [segmentedControl setTitleTextAttributes:attributes forState:UIControlStateNormal];

Note: This Question is unanswered, help us to find answer for this one

207.
Select all incorrect bundle ID(s):

com.company.appName

com.appName

appName

com.company-name.app-name

Answer

Correct Answer: appName

Note: This Question is unanswered, help us to find answer for this one

208.
Which of the following is not a valid icon size for any iOS device (iPhone, iPod, iPad)?

114 x 114

144 x 144

72 x 72

64 x 64

Answer

Correct Answer: 64 x 64

Note: This Question is unanswered, help us to find answer for this one

209.
Which of the following framework is needed to round corners of UILabel?

UIKit

CoreGraphics

QuartzCore

CoreAnimation

Answer

Correct Answer: QuartzCore

Note: This Question is unanswered, help us to find answer for this one

210.
Which of the following will change the placeholder text color in UITextField?

textField.placeHolder.textColor = [UIColor redColor];

textField.placeHolder.textLabel.textColor = [UIColor redColor];

textField.placeHolder.color = [UIColor redColor];

None of the above.

Answer

Correct Answer: None of the above.

Note: This Question is unanswered, help us to find answer for this one

211.
Which of the following is not a valid UIGestureRecognizer?

UITapGestureRecognizer

UIZoomGestureRecognizer

UIRotationGestureRecognizer

UIPanGestureRecognizer

Answer

Correct Answer: UIZoomGestureRecognizer

Note: This Question is unanswered, help us to find answer for this one

212.
Which of the following is the correct way to print out stack/trace to the console/log in Cocoa application?

NSLog(@”%@”,[NSThread callStackSymbols]);

NSLog(@”%@”,[NSThread callStackReturnAddresses ])

NSLog(@”%@”,[NSThread currentThread]);

None of the above.

Answer

Correct Answer: NSLog(@”%@”,[NSThread callStackSymbols]);

Note: This Question is unanswered, help us to find answer for this one

213.
Which of the following will return the device's current location?

CLLocationManager locationManager = [[CLLocationManager alloc] init]; [locationManager startUpdatingLocation];

CLLocationManager locationManager = [[CLLocationManager alloc] init]; [locationManager updateLocation];

CLLocationManager locationManager = [[CLLocationManager alloc] init]; [locationManager getLocation];

CLLocationManager locationManager = [[CLLocationManager alloc] init]; [locationManager findLocation];

Answer

Correct Answer: CLLocationManager locationManager = [[CLLocationManager alloc] init]; [locationManager startUpdatingLocation];

Note: This Question is unanswered, help us to find answer for this one

214.
Which of the following is not a valid Touch method with respect to Cocoa Touch programming?

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

None of above

Answer

Correct Answer: None of above

Note: This Question is unanswered, help us to find answer for this one

215.
How can it be detected if the app is running on an iPhone 5?

if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone5)

if([[UIScreen mainScreen] bounds].size.height == 568)

if([[UIScreen mainScreen] bounds].size.height == 1136)

if([[UIDevice currentDevice].model isEqualToString:@"iPhone5"])

Answer

Correct Answer: if([[UIScreen mainScreen] bounds].size.height == 568)

Note: This Question is unanswered, help us to find answer for this one

216.
Which of the following frameworks is needed to apply a border to an object?

UIKit

CoreGraphics

QuartzCore

Foundation

Answer

Correct Answer: QuartzCore

Note: This Question is unanswered, help us to find answer for this one

217.
Which of the following is the correct way to set the font size of UIButton title label?

someButton.font = [UIFont systemFontOfSize: 15];

someButton.titleLabel.font = [UIFont systemFontOfSize: 15];

[someButton setFont: [UIFont systemFontOfSize: 15]];

All of the above

Answer

Correct Answer: someButton.titleLabel.font = [UIFont systemFontOfSize: 15];

Note: This Question is unanswered, help us to find answer for this one

218.
What is the maximum size of an iOS application?

20 MB

50 MB

1 GB

2 GB

Answer

Correct Answer: 2 GB

Note: This Question is unanswered, help us to find answer for this one

219.
Which of the following is the correct way to get the value of the first object of a NsMutableArray stored in another NsMutableArray?

[[myArray objectAtIndex:0] objectAtIndex:0];

[myArray objectAtIndex:0]

[[[myArray objectAtIndex:0] objectAtIndex:0]objectAtIndex:0];

[myArray firstObject]

Answer

Correct Answer: [[myArray objectAtIndex:0] objectAtIndex:0];

Note: This Question is unanswered, help us to find answer for this one

220.
What is the use of performSelector in iOS?

To add a class delegate

To define a class

To call a method of a class

To add a selector method

Answer

Correct Answer: To call a method of a class

Note: This Question is unanswered, help us to find answer for this one

221.
What gets returned if XIB is not properly connected to a parent controller?

EXEC_BAD_ACCESS

SIGABRT

SIGKILL

None of these.

Answer

Correct Answer: EXEC_BAD_ACCESS

Note: This Question is unanswered, help us to find answer for this one

222.
What does the "strong" property attribute do?

It does not extend the lifetime of the object it points to, and automatically becomes nil.

It specifies a reference that does not keep the referenced object alive and is not set to nil.

It makes the object alive, as long as there is a strong pointer to it.

It specifies a reference that does not keep the referenced object alive and is not set to nil.

Answer

Correct Answer: It makes the object alive, as long as there is a strong pointer to it.

Note: This Question is unanswered, help us to find answer for this one

223.
What is true about ARC and manual memory management?

Always nil out properties in dealloc under ARC and manual memory management.

Do not have to nil out properties in dealloc under ARC and manual memory management.

nil out properties in dealloc under ARC but not in manual memory management.

nil out properties in dealloc under manual memory management but not in ARC.

Answer

Correct Answer: nil out properties in dealloc under ARC but not in manual memory management.

Note: This Question is unanswered, help us to find answer for this one

224.
Which of the following allows it to determine if an application is running on iPhone, or if it's running on an iPod Touch?

NSString *deviceType = [UIDevice currentDevice].model; if([deviceType isEqualToString:@"iPhone"])

NSString *deviceType = [UIDevice currentDevice].Size; if([deviceType isEqualToString:@"iPhone"])

NSString *deviceType = [UIDevice currentDevice].device; if([deviceType isEqualToString:@"Device"])

NSString *deviceType = [UIDevice currentDevice].iPhone; if([deviceType isEqualToString:@"iPhone"])

Answer

Correct Answer: NSString *deviceType = [UIDevice currentDevice].model; if([deviceType isEqualToString:@"iPhone"])

Note: This Question is unanswered, help us to find answer for this one

225.
Consider the following code:

(BOOL)application:(UIApplication )application didFinishLaunchingWithOptions:(NSDictionary )launchOptions {

    // Set Background Color/Pattern

    self.window.backgroundColor = [UIColor blackColor];

    self.tabBarController.tabBar.backgroundColor = [UIColor clearColor];

    //self.window.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"testbg.png"]];

    // Set StatusBar Color

    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent];

    // Add the tab bar controller's current view as a subview of the window

    self.window.rootViewController = self.tabBarController;

    [self.window makeKeyAndVisible];

    return YES;

}

How can the error be corrected that gets thrown in the console, "Applications are expected to have a root view controller at the end of application launch"?

self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

MenuViewController *menuViewController = [[MenuViewController alloc]init]; self.window.rootViewController = menuViewController;

Both

None of above

Answer

Correct Answer: MenuViewController *menuViewController = [[MenuViewController alloc]init]; self.window.rootViewController = menuViewController;

Note: This Question is unanswered, help us to find answer for this one

226. Is OpenAL available on the iPhone?

Yes

Answer

Correct Answer: Yes

Note: This Question is unanswered, help us to find answer for this one

227. Which of the following is not a touch event method?

- (void)touchesDragged:(NSSet *)touches withEvent:(UIEvent *)event;

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event

Answer

Correct Answer: - (void)touchesDragged:(NSSet *)touches withEvent:(UIEvent *)event;

Note: This Question is unanswered, help us to find answer for this one

228. How do you play a short sound on the iPhone?

With the NSSound class

With the UISound class

With AudioServicesPlaySystemSound function

With NSSystemSound function

None of the above

Answer

Correct Answer: With AudioServicesPlaySystemSound function

Note: This Question is unanswered, help us to find answer for this one

229. While using an iPhone, a user switches from one application to another application or service on the device. What is the most important factor to be kept in mind to ensure that your application reflects the most recent changes made by the user the next time it starts?

The user should be asked to click save and close from the start menu

The user should be asked to close your application

The application should be programmed to save any user changes as they are made as quickly as possible.

No specific consideration in this regard is necessary

Answer

Correct Answer: The application should be programmed to save any user changes as they are made as quickly as possible.

Note: This Question is unanswered, help us to find answer for this one

230. Can you use POSIX threads on the iPhone?

Yes

Answer

Correct Answer: Yes

Note: This Question is unanswered, help us to find answer for this one

231. Can the iPhone use Bonjour messaging?

Yes

No<br>

Answer

Correct Answer: Yes

Note: This Question is unanswered, help us to find answer for this one

232. Which of the following can be used to draw a tiled image?

Quartz 2D function CGContextDrawTiledImage

UIViews

Either a or b

Neither a not b

Answer

Correct Answer: Quartz 2D function CGContextDrawTiledImage

Note: This Question is unanswered, help us to find answer for this one

233. What is the endianness of the network for IP communications?

Big endian

Little endian

Mixed endian

Swapped endian

Single endian

Answer

Correct Answer: Big endian

Note: This Question is unanswered, help us to find answer for this one

234. Does ABPersonCreate function add the newly created record into the address book?

Yes

Answer

Correct Answer: No

Note: This Question is unanswered, help us to find answer for this one

235. What is the CompressResources build step in an iPhone Xcode project?

It resizes all the files in the project for  displaying them in the iPhone.

It resizes the png files in the project for  displaying them in the iPhone.

It compresses the files with the extensions .m and .h.

It changes the extension of the files and compresses  them.

Answer

Correct Answer: It resizes the png files in the project for  displaying them in the iPhone.

Note: This Question is unanswered, help us to find answer for this one

236. Can you place calls using the iPhone SDK?

Yes

Answer

Correct Answer: No

Note: This Question is unanswered, help us to find answer for this one

237. What is the default value for the anchorPoint property in Layer Geometry?

(0.0,0.0)

(0.0,0.5)

(0.5,0.0)

(0.5,0.5)

(1.0,1.0)

Answer

Correct Answer: (0.5,0.5)

Note: This Question is unanswered, help us to find answer for this one

238. Which of the following is a feature of CAPropertyAnimation class in Core Animation?

It is an abstract subclass that provides support for animating a layer property specified by a key path

It allows an array of animation objects to be grouped together and run concurrently

It provides simple interpolation for a layer property

It provides a transition effect that affects the entire layer's content. It fades, pushes, or reveals layer content when animating

Answer

Correct Answer: It is an abstract subclass that provides support for animating a layer property specified by a key path

Note: This Question is unanswered, help us to find answer for this one

239. Can non-main threads poll for events?

Yes

Answer

Correct Answer: No

Note: This Question is unanswered, help us to find answer for this one

240. How can you create an OpenGL ES texture with a .png image?

Using UIImage glTexture property

Using UIImageBitmapRep

Using CGContextDrawImage in a CGBitmapContext

You can't

None of the above

Answer

Correct Answer: Using CGContextDrawImage in a CGBitmapContext

Note: This Question is unanswered, help us to find answer for this one

241. What is the use of Alpha value that is available in attributes of every Interface Builder object?

It is used to set the number of controls that can be tapped at a time, which is required for an application that supports multitouch.

It is used to set the size of the User Interface object.

It is used to set the position of a User Interface object.

It is used to set the transparency of a User Interface object.

Answer

Correct Answer: It is used to set the transparency of a User Interface object.

Note: This Question is unanswered, help us to find answer for this one

242. The configuration data of table view objects in Xcode 4.x is loaded from:

an object that conforms to UITableViewDataSource protocol.

an object that conforms to UITableViewCell protocol.

an object that conforms to UITableViewDelegate protocol.

None of the above.

Answer

Correct Answer: an object that conforms to UITableViewDelegate protocol.

Note: This Question is unanswered, help us to find answer for this one

243. Which two of the following are true about (void)didReceiveMemoryWarning method?

This method can be overridden by the developer to release the additional memory used by view controller if any.

This method cannot be overridden.

This method is called by the system when the available memory is low.

The app calls this method directly for releasing memory when the available memory is low.

Answer

Correct Answer: This method can be overridden by the developer to release the additional memory used by view controller if any.

Note: This Question is unanswered, help us to find answer for this one

244. You are developing an application for iOS in Xcode 4.x. Which of the following options will check if a text field with id "TextField" is empty or not, and displaying it in a label with the id "Output"?

if(TextField.text == NULL) { Output.text=TextField.text; }

if(TextField.length == 0) { Output.text=TextField.text; }

if(TextField.text == @"") { Output.text=TextField.text; }

if(TextField.text.length == 0) { Output.text=TextField.text; }

Answer

Correct Answer: if(TextField.text.length == 0) { Output.text=TextField.text; }

Note: This Question is unanswered, help us to find answer for this one

245. Which of the following profiles is to be created to test an iOS app on a variety of devices and iOS versions?

Ad Hoc Provisioning Profile

iOS Team Provisioning Profile

Mac Team Provisioning Profile

None of the above

Answer

Correct Answer: Ad Hoc Provisioning Profile

Note: This Question is unanswered, help us to find answer for this one

246. Which of the following options is a property of UIActivityIndicatorView object in Xcode 4.x?

isAnimating

Custom

hidesWhenStopped

startAnimating

stopAnimating

Answer

Correct Answer: hidesWhenStopped

Note: This Question is unanswered, help us to find answer for this one

247. As an iOS app tester, which of the following are the advantages of having an ad hoc provisioning profile?

Testers do not need to get enrolled in an Apple Developer Program.

Testers are enrolled into a team and can thus use the iOS team provisioning profile.

Testers can create their own signing certificates.

All of the above

Answer

Correct Answer: Testers do not need to get enrolled in an Apple Developer Program.

Note: This Question is unanswered, help us to find answer for this one

248. Which of the following frameworks must be added in an Xcode 4.x project to play audio files?

OpenAL.framework

CoreAudioKit.framework

AudioToolbox.framework

All of the above

Answer

Correct Answer: AudioToolbox.framework

Note: This Question is unanswered, help us to find answer for this one

249. Which of the following is not an inbuilt received action in a Web View Interface Builder object?

goBack

goForward

reload

refresh

stopLoading

Answer

Correct Answer: refresh

Note: This Question is unanswered, help us to find answer for this one

250. Which of the following profiles are automatically created and installed on the iOS device when you add an iOS device in Xcode 4.x for the first time?

iOS Development Profile

Run4Color Development

iOS Team Provisioning Profile

Mac Team Provisioning Profile

Answer

Correct Answer: iOS Team Provisioning Profile

Note: This Question is unanswered, help us to find answer for this one

251. The minimum resolution required for app icons on iOS or iPod touch with non-retina display is:

24 x 24 pixels

57 x 57 pixels

114 x 114 pixels

72 x 72 pixels

Answer

Correct Answer: 57 x 57 pixels

Note: This Question is unanswered, help us to find answer for this one

252. The given image is a snapshot of an iOS app. What does it depicts?

A User Interface object, i.e., Round Rect Button is connecting to its Outlet that may or may not be defined/available in File's Owner Object.

A User Interface object, i.e., Round Rect Button is connecting to an action/event that may or may not be defined/available in File's Owner Object.

A User Interface object, i.e., Round Rect Button is connecting to an interface that may or may not be defined/available in File's Owner Object.

None of the above.

Answer

Correct Answer: A User Interface object, i.e., Round Rect Button is connecting to an action/event that may or may not be defined/available in File's Owner Object.

Note: This Question is unanswered, help us to find answer for this one

253. What is the use of creating outlets for objects in iOS applications?

To specify which view to load first.

To layout every possible path/transition in your application.

To create connections between object and its nib/storyboard file.

They create a reference from the object in your code file to the objects defined in your nib/xib/storyboard file.

Answer

Correct Answer: They create a reference from the object in your code file to the objects defined in your nib/xib/storyboard file.

Note: This Question is unanswered, help us to find answer for this one

254. Which of the following settings is optional while submitting an app to the Apple App Store?

App Icon

Launch Image

Version

Answer

Correct Answer: Launch Image

Note: This Question is unanswered, help us to find answer for this one

255. What is the use of "Disabled" attribute of a Text Field object?

It returns true if text field is disabled.

It specifies the text that is to be displayed as the background of text field when it is disabled.

It returns the status of the text field i.e. whether disabled true or false.

It specifies an image that is to be displayed as the background of text field when it is disabled.

Answer

Correct Answer: It specifies an image that is to be displayed as the background of text field when it is disabled.

Note: This Question is unanswered, help us to find answer for this one

256. Which of the following is the correct declaration of an input text field with the title, "input2"?

IBOutlet UITextField *input2;

IBOutlet UIText *input2;

IBoutlet UIViewControllerTextField *input2;

IBOutlet UITextField input2;

Answer

Correct Answer: IBOutlet UITextField *input2;

Note: This Question is unanswered, help us to find answer for this one

257. Which of the following attributes in Xcode 4.x, enables you to display "Comment" as a text inside a text field, as given in the image?

Placeholder

Text

Label

Appearance

Title

Placeholder Text

Answer

Correct Answer: Placeholder

Note: This Question is unanswered, help us to find answer for this one

258. Suppose you are creating an ad hoc provisioning profile in Xcode 4.x. Which of the following will you seek from your testers/testing team to add to the iOS Provisioning Portal?

Code signing certificate

Developer Profile

App's data

Device IDs

All of the above

Answer

Correct Answer: Device IDs

Note: This Question is unanswered, help us to find answer for this one

259. Which of the following can help you to add a new framework to your iOS app in Xcode 4.x?

Expand framework folder. Right-click on any existing framework. Select "Show in Finder" option. Locate the desired framework in finder. Copy it and paste it into the Frameworks folder under project navigator.

Expand framework folder. Right-click on any existing framework. Select "Show in Finder" option. Locate the desired framework in finder. Drag it from finder and drop it onto the Frameworks folder under project navigator.

Right-click on framework, select new file and add the framework.

Answer

Correct Answer: Expand framework folder. Right-click on any existing framework. Select "Show in Finder" option. Locate the desired framework in finder. Drag it from finder and drop it onto the Frameworks folder under project navigator.

Note: This Question is unanswered, help us to find answer for this one

260. The files InfoPlist.strings and main.m are always found in ___________, by default.

app's main folder under project navigator, where .xib, .h and .m files are stored

Supporting Files folder in your app's main folder under project navigator

Tests folder under project navigator

Products folder under project navigator

Answer

Correct Answer: Supporting Files folder in your app's main folder under project navigator

Note: This Question is unanswered, help us to find answer for this one

261. Which of the following is the correct declaration of property of a "Date Picker" user interface object?

@property (nonatomic, retain, release) IBOutlet UIDatePicker;

@property (nonatomic, retain) IBOutlet UIDatePicker dp;

@property (nonatomic, retain, release) IBOutlet UIDatePicker &dp;

@property (nonatomic, retain) IBOutlet UIDatePicker *dp;

Answer

Correct Answer: @property (nonatomic, retain) IBOutlet UIDatePicker *dp;

Note: This Question is unanswered, help us to find answer for this one

262. Which of the following Interface Builder objects will help you to create an animation with a given number of images?

Answer

Correct Answer: 5

Note: This Question is unanswered, help us to find answer for this one

263. When you download a file and the application go to background. You can ...

continue to download without limits only since iOS 7

continue to download with limits

continue to download only since iOS 7

continue to download with limits only since iOS 7

Answer

Correct Answer: continue to download without limits only since iOS 7

Note: This Question is unanswered, help us to find answer for this one

264. If you have a CGPathRef and need to draw this path to a core animation layer, which object would you use.

CAShapeLayer

CGPathLayer

CAPathLayer

CGPathRefLayer

CALayer

Answer

Correct Answer: CAShapeLayer

Note: This Question is unanswered, help us to find answer for this one

265. Which one of the following is true?

You can modify UIKit drawing on a background thread

None of these are true

You can modify Core Animation layers on a background thread

You can only create and draw to an image context on the main thread

Answer

Correct Answer: You can modify Core Animation layers on a background thread

Note: This Question is unanswered, help us to find answer for this one

266. How can an application respond to they keyboard being dismissed by the user

[UIResponder shouldResignFirstResponder]

[UIResponder didResignFirstResponder]

UIKeyboardWillHideNotification

[UIResponder resignFirstResponder]

This cannot be done

Answer

Correct Answer: UIKeyboardWillHideNotification

Note: This Question is unanswered, help us to find answer for this one

267. Which of the following methods is used to deallocate all the noncritical custom data structure associated with your view controller?

None of above

viewDidUnload

viewWillUnload

didReceiveMemoryWarning

dealloc

Answer

Correct Answer: didReceiveMemoryWarning

Note: This Question is unanswered, help us to find answer for this one

268. What class can implement Document Objects?

NSUrl

NSDocument

NSArray

UIDocument

Answer

Correct Answer: UIDocument

Note: This Question is unanswered, help us to find answer for this one

269. True or False: In Objective C, all instance methods are accessors.

False

TRUE

Answer

Correct Answer: False

Note: This Question is unanswered, help us to find answer for this one

270. Which scenario will not result in NSOperation throwing an exceptions:

When the operation is executing or finished (possibly because it was canceled) and its start method is called again.

When you try to retrieve the result of an NSInvocationOperation object that was canceled.

When you try to add a completion block to an operation that is already executing or finished.

When the operation is not ready to execute but its start method is called.

When the return value from a completion block is nil.

Answer

Correct Answer: When the return value from a completion block is nil.

Note: This Question is unanswered, help us to find answer for this one

271. What is the effect of using 'weak' in the following @property definition: @property (nonatomic, weak) SomeClass *responder; ?

The responder object is retained and the pointer is set to nil when the object is destroyed

The responder object is not retained and the pointer is set to nil when the object is destroyed

The responder object is retained and the pointer will point to free memory when the object is destroyed

The responder object is not retained and the pointer will point to free memory when the object is destroyed

Answer

Correct Answer: The responder object is not retained and the pointer is set to nil when the object is destroyed

Note: This Question is unanswered, help us to find answer for this one

272. Which of the following is true?

A class cannot implement more than one protocol

A class cannot be declared as abstract

Instance variables must begin with underscore

Instance variables have to be declared in the header file containing the class definition

Answer

Correct Answer: A class cannot be declared as abstract

Note: This Question is unanswered, help us to find answer for this one

273. The app is in the background but not executing code. What State App is it in?

Suspended

InActive

Terminated

None of above

Background

Answer

Correct Answer: Suspended

Note: This Question is unanswered, help us to find answer for this one

274. This code doesn't do much, but which line will call the + (void)initialize method on the class SomeClass 1. - (void)doSomething 2. { 3. [SomeClass someClassMethod]; 4. SomeClass obj = [[SomeClass alloc] init]; 5. NSString descriptionString = [obj getNewString]; 6. }

line 3

line 1

line 5

line 4

Answer

Correct Answer: line 3

Note: This Question is unanswered, help us to find answer for this one

275. True or False? An object with at least one owner can be destroyed.

True

False

Answer

Correct Answer: True

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276. NSXMLParser is which kind of parser ?

SAX Parser

DOM Parser

Answer

Correct Answer: SAX Parser

Note: This Question is unanswered, help us to find answer for this one

277. Which of the following best describes the differences between iOS 7 and iOS 6?

iOS 7 supports Autolayout.

iOS 7 user interface has been completely redesigned.

iOS 7 user interface has been completely redesigned and has 64-Bit Support.

iOS 6 is not supported on iPhone 5s and iPhone 5c

Answer

Correct Answer: iOS 7 user interface has been completely redesigned and has 64-Bit Support.

Note: This Question is unanswered, help us to find answer for this one

278. Which of the follow statements is TRUE of the use of categories?

A category can only be declared for abstract classes.

You can also use categories to split the implementation of a complex class across multiple source code files.

The syntax to declare a category uses the @protocol keyword.

The compiler synthesises any instance variable or property accessor methods for the category.

Answer

Correct Answer: You can also use categories to split the implementation of a complex class across multiple source code files.

Note: This Question is unanswered, help us to find answer for this one

279. How can you make the following code display with rounded corners? UIView *rectView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)]; rectView.backgroundColor = [UIColor redColor]; rectView.layer.cornerRadius = 8; [self.view addSubview:rectView];

rectView.roundedCornersVisible = YES;

[rectView drawRect:rectView.bounds];

rectView.layer.masksToBounds = YES;

[rectView setNeedsDisplay];

Answer

Correct Answer: rectView.layer.masksToBounds = YES;

Note: This Question is unanswered, help us to find answer for this one

280. What class supports the sharing of small amounts of data such as strings or dates to iCloud?

NSUbiquitousKeyValueStore

NSUrlConnection

NSOperation

Answer

Correct Answer: NSUbiquitousKeyValueStore

Note: This Question is unanswered, help us to find answer for this one

281. What structure can be used to define a portion of a series?

NSString

NSRange

NSSet

CGPoint

Answer

Correct Answer: NSRange

Note: This Question is unanswered, help us to find answer for this one

282. In order to test your application in XCode, which testing frameworks are available?

MinUnit, IOSUnit

(all of these)

Tes.ting

NUnit, JUnit

OCMock, OCUnit, XCTest

Answer

Correct Answer: OCMock, OCUnit, XCTest

Note: This Question is unanswered, help us to find answer for this one

283. What do you use to expose preferences for your app in the Settings section of the device?

settings.m

Settings.bundle

NSSetting

Variables.bundle

Answer

Correct Answer: Settings.bundle

Note: This Question is unanswered, help us to find answer for this one

284. When do you use the "assign" value for a property?

Never. It should always be either: atomic, nonatomic, strong or weak

For primitive values such as BOOLs or NSIntegers

On strings

On arrays and dictionaries

Answer

Correct Answer: For primitive values such as BOOLs or NSIntegers

Note: This Question is unanswered, help us to find answer for this one

285. Which of the following holds data and knows nothing about the user interface?

Controller objects

View objects

Model objects

All of these

Answer

Correct Answer: Model objects

Note: This Question is unanswered, help us to find answer for this one

286. What is the difference between NSInteger and int?

NSInteger is long int and int is just int

They are the same

Answer

Correct Answer: NSInteger is long int and int is just int

Note: This Question is unanswered, help us to find answer for this one

287. What can be linked to an Obj-C program without any particular process?

Java jar files

scripts

C++ libraries

executables

Answer

Correct Answer: C++ libraries

Note: This Question is unanswered, help us to find answer for this one

288. +(void)doSomething{}

Is a instance method

Both true

Is a class method

both false

Answer

Correct Answer: Is a class method

Note: This Question is unanswered, help us to find answer for this one

289. In ARC enabled project: [someObject release];

Compile error

Nothing will do

Crash on run time

Some time crash some time run well

Answer

Correct Answer: Compile error

Note: This Question is unanswered, help us to find answer for this one

290. What is a category?

A namespace

A category is a way to add methods to a class which already exists

A group of classes

A way to add instance variables to a class which already exists

Answer

Correct Answer: A category is a way to add methods to a class which already exists

Note: This Question is unanswered, help us to find answer for this one

291. What function do you call to close the current view and go back to the root?

popToRootViewController

closeCurrentView

popToMainViewController

pushRootViewController

Answer

Correct Answer: popToRootViewController

Note: This Question is unanswered, help us to find answer for this one

292. What is the difference between Cocoa and Cocoa Touch?

Cocoa Touch is another name for a Cocoa framework

Cocoa Touch is the application framework for developing applications in Mac OS X. Cocoa is the application framework for iPhone,iPad and iPod Touch .

Cocoa is the application framework for developing applications in Mac OS X. Cocoa Touch is the application framework for iPhone,iPad and iPod Touch .

Answer

Correct Answer: Cocoa is the application framework for developing applications in Mac OS X. Cocoa Touch is the application framework for iPhone,iPad and iPod Touch .

Note: This Question is unanswered, help us to find answer for this one

293. What structure can hold an x and y coordinate that defines a location?

CGSize

CGPoint

CGRect

NSFrame

Answer

Correct Answer: CGPoint

Note: This Question is unanswered, help us to find answer for this one

294. If you use threading, on which thread should UI Transitions be called?

The main thread

The background thread

Concurrent threads

Any thread

Answer

Correct Answer: The main thread

Note: This Question is unanswered, help us to find answer for this one

295. Is it possible to make a full application without using Interface Builder?

Yes, but only for iPad

Yes, on any platform

No, you always have to use Interface Builder to meet Apple's app standards

Answer

Correct Answer: Yes, on any platform

Note: This Question is unanswered, help us to find answer for this one

296. When using ARC, how do you destroy an object in Objective C?

Set the variable that points at it to 1

All of these

Set the variable that points at it to nil

Set the variable that points at it to 0

Answer

Correct Answer: Set the variable that points at it to nil

Note: This Question is unanswered, help us to find answer for this one

297. True or False: viewDidLoad comes after viewDidAppear?

False

True

Answer

Correct Answer: False

Note: This Question is unanswered, help us to find answer for this one

298. Which of the following objects is visible to the user?

View objects

Model objects

None of these

Controller objects

Answer

Correct Answer: View objects

Note: This Question is unanswered, help us to find answer for this one

299. In manual memory management, what do you do when you don't need a reference on a object ?

[obj release];

free(obj)

[obj dealloc]

[obj free]

Answer

Correct Answer: [obj release];

Note: This Question is unanswered, help us to find answer for this one

300. What is the function in Objective C that determines what is in the cells of a tableView?

cellForRowAtIndexPath

cellForTableView

tableViewCellContents

tableView.cell.content

Answer

Correct Answer: cellForRowAtIndexPath

Note: This Question is unanswered, help us to find answer for this one

301. An indexPath has a Section and a ____

Grid

Row or item

Column

Coordinate

Answer

Correct Answer: Row or item

Note: This Question is unanswered, help us to find answer for this one

302. If an asset is for iPad only, how do you specify it in the file name?

~iPhone

~iPad

!iPhone

!iPad

Answer

Correct Answer: ~iPad

Note: This Question is unanswered, help us to find answer for this one

303. True or False: The main thread handles touch inputs

True

False

Answer

Correct Answer: True

Note: This Question is unanswered, help us to find answer for this one

304. True or False: A Collection View is another name for a tableView

False

True

Answer

Correct Answer: False

Note: This Question is unanswered, help us to find answer for this one

305. What data type do you initialize if you want a string that can change?

NSString

NSMutableString

NSChangeableString

NSCore

Answer

Correct Answer: NSMutableString

Note: This Question is unanswered, help us to find answer for this one

306. The archive that holds the saved create and configure view objects is known as:

XML

XID

XBI

XIB

Answer

Correct Answer: XIB

Note: This Question is unanswered, help us to find answer for this one

307. Which of the following symbols do you prefix a character string with when you want a hard coded string?

Answer

Correct Answer: @

Note: This Question is unanswered, help us to find answer for this one

308. What is @2x used for?

Retina Assets

NSStrings

All Images

Normal Assets

Answer

Correct Answer: Retina Assets

Note: This Question is unanswered, help us to find answer for this one

309. What's the difference between NSArray and NSMutableArray?

NSMutableArrayʼs contents can not be modified once itʼs been created whereas a NSArray can be modified as needed

NSArray is an abstractClass class and NSMutableArray is a protocol

NSArrayʼs contents can not be modified once itʼs been created whereas a NSMutableArray can be modified as needed

NSArray has a limited capacity of 256 items where as NSMutableArray is unlimited

Answer

Correct Answer: NSArrayʼs contents can not be modified once itʼs been created whereas a NSMutableArray can be modified as needed

Note: This Question is unanswered, help us to find answer for this one

310. Which of the following keyboard shortcuts will run your app on the simulator?

Command-A

Command-P

Command-R

Command-G

Answer

Correct Answer: Command-R

Note: This Question is unanswered, help us to find answer for this one

311. What function is called for each cell in a Table View?

viewWillLoad

cellDidAppear

cellForRowAtIndexPath

viewDidLoad

Answer

Correct Answer: cellForRowAtIndexPath

Note: This Question is unanswered, help us to find answer for this one

312. How do you reference your app bundle?

app.io

self.bundle

self.app.fileSystem

[NSBundle mainBundle]

Answer

Correct Answer: [NSBundle mainBundle]

Note: This Question is unanswered, help us to find answer for this one

313. What file contains configuration data for the app?

Main.m

config.m

Info.plist

AppDelegate.h

Answer

Correct Answer: Info.plist

Note: This Question is unanswered, help us to find answer for this one

314. Difference between a frame and bounds?

Bounds origin is always (0, 0), a frame origin is relative to his container view

It's the same

Frame is for UIKit objects, bounds are for CoreGraphics.

Answer

Correct Answer: Bounds origin is always (0, 0), a frame origin is relative to his container view

Note: This Question is unanswered, help us to find answer for this one

315. What data object can store a timestamp the best?

NSString

NSNumber

NSDate

NSArray

Answer

Correct Answer: NSDate

Note: This Question is unanswered, help us to find answer for this one

316. What data type do you initialize if you want a list of items that can change?

NSMutableArray

NSMutableDictionary

NSArray

NSDictionary

Answer

Correct Answer: NSMutableArray

Note: This Question is unanswered, help us to find answer for this one

317. Which of the following code snippets would work for changing the position of a view?

(none of these)

view.frame.size.x = 0; view.frame.size.y = 100;

view.frame.x = 0; view.frame.y = 100;

CGPoint center = view.center; center.x = 0; center.y = 100; view.center = center;

Answer

Correct Answer: CGPoint center = view.center; center.x = 0; center.y = 100; view.center = center;

Note: This Question is unanswered, help us to find answer for this one

318. When adding objects to NSMutableDictionary, the key...

Must be a string literal

Must conform to the NSCopying protocol

Must be wither an NSString or an NSNumber

Can be any object

Answer

Correct Answer: Must conform to the NSCopying protocol

Note: This Question is unanswered, help us to find answer for this one

319. True or False? When you create a new iOS project from a template, the template automatically makes a controller object for you.

FALSE

True

Answer

Correct Answer: True

Note: This Question is unanswered, help us to find answer for this one

IOS Technical Test MCQs | Topic-wise

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Basic iOS Technical Test MCQ

1. Which of the following cryptographic algorithms are supported in iOS1O or higher?

2. Which of the following statements are correct about Apple Pay Buttons?

3. With respect to the DispatchSource.ProcessEvent event in Grand Central Dispatch (GCD), which of the following options is/are the valid instance method(s)?

4. We have two objects: OBJA and OBJB. OBJB points to another object OBJX. Which of the following test cases are correct related to these 3 pointers?

5. Which of the following statements are correct about NSManagedObjectContext?

6. Which of the following classes are deprecated in Sirikit?

7. Which of the following options are correct regarding automatic reference counting (ARC)?

8. Which of the following functions of the AVCaptureSession class manage the running state of a capture device?

9. In iOS10, which of the following are the new behavioral changes in Core data?

10. Which of the following statements are correct about background app modes?

11. Which of the following stages of an ln-App purchase are handled by the App Store?

12. Apple Pay JavaScript API is supported on which of the following?

13. Which of the following Options are the three components of App Thinning?

14. Which of the following classes have DispatchObject as the base class?

15. In iOS 10, which of the following options are correct about pasteboard?

16. Which of the following Accessing Action attributes belong to the CXAction class?

17. Which of the following methods of the UlAppIication objects are called by an app that requires additional time for the completion of a task ?

18. In ios10, which of the following statements are correct about Xcode auto generation of classes?

19. In iOS, which of the following options are correct regarding slicing?

20. Which of the following statements are correct about NSFetchedResuItsController?

21. In ApplePay JS, which of the following are correct about the ApplePayPaymentRequest data type?

22. Which of the following App Extension points are available both in iOS and macOS?

23. Which of the following statement are correct about the NSManagedObject class?

24. Which of the following options are correct about the Operation class, NSOperation?

25. The iMessage app is used to:

26. In iOS 10, which of the following are the new methods introduced in the NSManagedObject class?

27. Which of the following statements are correct about NSFetchRequest?

28. Which of the following App Transport Security dictionary keys are of the type, Boolean?

29. Which of the following are the App Transport Security (ATS) exception domains dictionary keys (not primary keys)?

30. Which of the following classes provides input data to a capture session?

31. To prevent memory leakage, iOS uses a policy based on a number, which is maintained by every reference object. What is it called?

32. which of the following class objects is used to manage capture activity and coordinates the flow of data from input devices to capture outputs?

33. In SiriKit, which of the following INSearchCallHistorylntent class instance properties is deprecated in iOS1O onwards?

34. Apple Pay uses Passkit framework. Which of the following classes in Passkit framework is used to store information about Apple Pay Cards?

35. You want to pay for a gym subscription for 10 months. The payment is to be made via Apple Pay. It is a type of:

36. You want to pre-order an item from an online store. The payment for the pre-order is to be done using Apple Pay. This scenario comes under which of the following transaction types?

37. Core Data now supports pinning an NSManagedObjectContext to a specific query generation. Which of the following classes iS used to specify a pinning behavior or a specific version from another context?

38. In the AVFoundation framework, which of the following classes contains per-pixel distance or disparity information, while capturing images using iphone 7 plus?

39. In the Notif‌icationCenter framework, the NCWidgetController class is inherited from the:

40. The lNVocabulary class in SiriKit is inherited from which of the following classes?

41. Which of the following classes is used to specify a notification's content and the condition that triggers its delivery?

42. In the AVFoundation framework, which of the following classes has been deprecated in iOS 10?

43. Which of the following is a new class in the AVFoundation framework, which is used to provide a modern interface for capture workflows related to still photography?

44. Which of the following is a new key for the info.plist file introduced in iOS 10?

45. Which of the following Trigger class objects indicates that a notif‌ication was sent by the Apple Push Notification Service?

46. Which of the following SiriKit components is a type of protocol?

47. Which of the following CodeDate classes maintains a small connection pool for allowing concurrent database operations for NSSOLiteStoreType persistent stores?

48. Which of the following events of the Apple Pay JS framework defines the attributes contained by the onshippingmethodselected callback function?

49. Which of the following is an object that manages a memory—based data buffer in Grand Central Dispatch (GCD)?

50. Which of the following classes manages notif‌ication-related activities for an app or app extension?

51. Which of the following ApplePay JS Data Types showcases the outcome of authorizing a payment request and contains encrypted payment information?

52. Which of the following Messages framework classes is used to display a dynamically-generated list of stickers. which is capable of drag-and-drop functionality?

53. Which of the following classes handles the editable content of a notification?

54. Which of the following core extensions of Intents framework represents the entry point for an Intents extension?

55. Which of the following classes handles the communication between a user and an app involving the intent object?

56. Sliced apps are supported by devices running:

57. Which of the following App Extension points handle tasks related to supporting Siri integration with an iOS App?

58. Which of the following protocols defines the methods to handle the displaying and editing of content in the Today Widget?

59. Which of the following primary ATS keys disables all ATS restrictions for media. which an app loads using the AV Foundation framework?

60. Which of the following functions participates in the preparation of a session, using the SecureTransport API?

61. Which of the following functions is used to provide the largest data packet, which the operating system guarantees, can be sent without fragmentation?

63. Grand Central Dispatch (GCD) provides functions to access several common dispatch queues in an application. Which of the following functions, when called from inside a block object, returns the queue, to which the block was originally submitted for queuing?

64. Which of the following classes defines an object, which specifies if the widget has content to display?

65. Which of the following Messages framework classes is used to create and update messages?

66. Which of the following classes is used to find and monitor the available capture devices on a system (iphone/ipad)?

67. Which of the following class objects is used to perform certain tasks, in response of a delivered notification?

68. Which of the following methods manages the execution of work items in a queue?

69. The INGetCarLockStatuslntent class in SiriKit is inherited from which class?

70. Which of the following protocols is used to present custom content in the Siri and Maps interfaces?

71. In iOS1O CodeData, NSPersistentContainer uses a new class to describe the conf‌iguration information to pass to NSPersistentStoreCoordinator. while adding a persistent store. That class is:

72. In Sirikit, which of the following protocols is used to get the current status of a car

73. Which of the following classes in the CallKit framework declares a programmatic interface for objects that represent a telephony action?

74. Which of the following types of queues is provided and managed by Grand Central Dispatch (GCD), using which, an app can submit tasks, in the form of block objects?

75. Which of the following VOIP protocols manages the searching of a user

76. If you want to rotate an object using Core Animation, in radians, in the z axis, which of the following key paths of a layer’s CATransform3D matrix will you use?

77. What happens if Xcode is not able to find a file or folder at the path defined for it in the project?

78. Which of the following statements is correct regarding functions fopen and open in generic C?

79. What is the function of the Code Sense feature in Xcode?

80. If the code is written using the Core Foundation and Foundation macros, the simplest way to create strings files is:

76.
If you want to rotate an object using Core Animation, in radians, in the z axis, which of the following key paths of a layer’s CATransform3D matrix will you use?

77.
What happens if Xcode is not able to find a file or folder at the path defined for it in the project?

78.
Which of the following statements is correct regarding functions fopen and open in generic C?

79.
What is the function of the Code Sense feature in Xcode?

80.
If the code is written using the Core Foundation and Foundation macros, the simplest way to create strings files is:

81.
What method definition do if the value of the accessed counter is 0? - (void)discardContentIfPossible

82.
Which Core Audio Service framework is used to record, play back, pause, loop, and synchronize audio in iPhone OS 4.0?

83.
What will the hitTest: object of the CALayer class return if the point lies outside the receiver's bounds rectangle?

84.
Apple's implementation of HTTP Live Streaming supports DRM (Digital rights management).

85.
You want to animate a layer's opacity to 0 while moving it further away in the layer. Which of the following code snippets will you use?

86.
Which properties of the UIImage class are not in use after iOS 4.2?

87.
Which part of the HTTP Live Streaming is responsible for taking input streams of media and encoding them digitally?

88.
Which defined types is a dynamic object type in Objective-C?

89.
Which of the following terms are related to Memory Management in Objective-C?

90.
Which of the following is NOT a parameter of function SecKeyDecrypt
of the class SecCertificate in iPhone OS 4.0?

91.
Which of the following properties of ADBannerView class are readonly?

92.
Which of the following is NOT the default behavior of an audio
session in iPhone OS?

93.
Which Audio Toolbox framework file defines an interface for reading
and writing audio data in files in iPhone OS 4.0?

94.
What is the functionality of the beta parameter of function
catlas_caxpby in class cblas?

95.
The genstrings tool can parse _____.

96.
What is the data type of extendStart parameter of function
CGShadingCreateAxial of class CGShading?

97.
Using the following function, what will you get from the default
database?

NSUserDefaults defs = [NSUserDefaults standardUserDefaults];
NSArray languages = [defs objectForKey:@"AppleLanguages"];
NSString *preferredLang = [languages objectAtIndex:0];

98.
Which symbol is used as a syntactic marker for blocks of code in
iPhone OS 4.0?

99.
Which of the following need to be modified while localizing an
application?

100.
Which of the following statements regarding Objective-C are correct?

101.
Which of the following reasons will return a value of NO for the
instance method startVideoCapture of class
UIImagePickerController?

102.
What is the return value of SecRandomCopyBytes function of
SecRandom class in iPhone OS 4.0 if the function completes
successfully?

103.
What is the datatype of the parameter inValidBitsPerChannel for the
function CalculateLPCMFlags in CoreAudioTypes class in iPhone OS
4.0?

104.
Which of the following directives are used to declare and define
classes, categories, and protocols?

105.
What is the value type of UTTypeConformsTo key of uniform type
identifier for iPhone OS 4.0?

106.
Which of the following methods is used for the purpose of creating
your view objects in memory management?

107.
While opening Nib files, which of the following should not be ignored?

108.
Which of the following OpenGL ES objects is a simple 2D graphics
image in a specified format?

109.
When you send an object a retain message in Memory Management
using Objective-C, what will happen?

110.
Consider the following code with 2 alternatives of vector operator for
OpenGL ES:
highp float f0,f1;
highp vec4 v0, v1;
Alternative 1: v0 = (v1f0)f1;
Alternative 2: v0 = v1 * (f0 * f1);
Which alternative demonstrates proper use of vector operations?

111.
What will be the return value of CFHTTPMessageApplyCredentials
function of CFHTTPMessage class if the authentication is
successful?

112.
Which of the following types of audio files has NO size restriction?

113.
What are universal binaries in Xcode?

114.
Which Core Audio Services framework handles positional and lowlatency audio services in iPHone OS 4.0?

115.
What will be the value of the clockwise parameter of the
CGContextAddArc function of the CGContext class if you want to
create a counterclockwise arc?

116.
Which of the following are new features to have been introduced in
iPhone OS 4.0?

117.
When your session becomes active, which of the following iPhone
OS 4.0 audio session categories allows other audio to continue
playing?

118.
What will be the return value of function
ABPersonComparePeopleByName when person1 goes before
person2 in class ABPersonComparePeopleByName in iPhone OS
4.0?

119.
Which of the following are the Derivative types defined in ObjectiveC?

120.
What is the default setting to refer to file locations in your Xcode
project?

121.
What type of value is assigned to the loc-args child property of alert
property in an Apple Push Notification?

122.
Which of the following properties of the GKSession class is readonly?

123.
Which of the following are NOT a property of
UIImagePickerController class in iPhone OS 4.0?

124.
What is the default value of the remoteParticipantVolume property of
the class GKVoiceChatService in iPhone OS 4.0?

125.
When the genstrings tool discovers a key string used more than once
in a single strings file, it:

126.
Which of the following iTunes application URLs are NOT valid?

127.
Which of the following is the correct syntax for declaring a class in
Objective-C?

128.
What is the datatype of the clockwise parameter of the
CGContextAddArc function of the CGContext class?

129.
How much time in seconds will it take to display an animation if you
have 60 images using UIImageView class for the property
animationDuration?

130.
When using a Cocoa framework, what will all ControlEvents method
of UIControl class return in case it fails to create the object?

131.
Which of the following properties of the UIImage class affects the way
the image data is displayed when drawn?

132.
What is the default value of allowsEditing property of
UIImagePickerController class in iPhone OS 4.0?

133.
What is the return value of function CGColorGetAlpha of class
CGColor?

134.
Before editing the Nibs, one should:

135.
What is the purpose of active executable in an Xcode project?

136.
Which of the following animation class provides simple interpolation
between values for a layer property?

137.
What is the default value of the borderColor property of the CALayer
class?

138.
By default, is the search interface visible in the
UISearchDisplayController class?

139.
Which of the following properties of the CAKeyframeAnimation class
represents an optional array of NSNumber objects that define the
duration of each keyframe segment?

140.
Which of the following languages can be used to write the code for
Xcode projects?

141.
Which of the following copy functions will you use in Objective-C to
create an entirely new compound object?

142.
; "> What will happen if your filename ExampleImage.png is being called
as follows:
[UIImage imageNamed:@”ExampleImage.PNG”]

143.
What is the default value of the fontSize property of the CATextLayer
class?

144.
In a Cocoa framework, how do the UIKit classes UIControl,
UITextField, UIButton, and UITableView deliver their services?

145.
Which of the following debugging tasks are provided by Xcode to find
and squash bugs in your code?

146.
Locking all connections before editing the Nib files can be achieved
by using:

147.
Which of the following debugging tasks are provided by Xcode to find and squash bugs in your code?

148.
Which of the following programmatically avoids auto-lock?

149.
Which of the following are true regarding the usage of NSinteger and int in iOS?