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Basic Sencha MCQ

1. True or False? In the Drawing and Charting package, you need to load the Charting package to create a drawing surface.

False

True

Answer

Correct Answer: False

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2. Stores have which of the following relations to data-bound components?

Data-bound components are the underlying architecture of stores

Data-bound components connect to stores to display lists or trees of data

Data-bound components encapsulate the connection between stores and othe storage mechanism

Any change to the store will result in an update of the Data-bound components

Answer

Correct Answer: Data-bound components connect to stores to display lists or trees of data

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3. True or False? Sencha.io will not automatically preserve aspect ratio.

True

False

Answer

Correct Answer: False

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4. What two ways can an event component be added?

Inherited from the Ext.Container class or Ext.Component class

On a separate class controller or included as a module

On the view definition itself or on a separate controller class

On the view definition itself or included as a module

Answer

Correct Answer: On the view definition itself or on a separate controller class

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5. True or False? Sencha Touch lists don't rely on being bound to stores of model instances.

True

False

Answer

Correct Answer: False

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6. In order for this piece of code to work properly what piece of code must be placed before it? "Ext.app.Controller"

refs:

config:

define:

extend:

Answer

Correct Answer: extend:

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7. What do profiles allow developers to offer?

different user experiences in different device categories

different user interfaces in different device categories

universal user experiences in different devices

user accounts with individualized data

Answer

Correct Answer: different user experiences in different device categories

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8. Unless you tell it otherwise, Sencha.io Src will resize the image to fit the physical screen of the mobile handset visiting your site, based on:

It's user-agent string

The mobile-source string

The version of Sencha you are using

Its functional hardware setup

Answer

Correct Answer: It's user-agent string

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9. All of the configurations for a given Component are listed in the "Config options" section of which page?

Class docs page

Component feature page

List tools page

Object modify page

Answer

Correct Answer: Class docs page

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10. Sencha's theming subsystem is called Syntactically _____ Stylesheets.

Compiled

Styled

Awesome

Accurate

Answer

Correct Answer: Awesome

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11. How are new applications generated in Sencha Touch?

All of These

Direct download from Sencha Touch website

Through Sencha command

Through Sencha Theme designer

Answer

Correct Answer: Through Sencha command

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12. In: "src='http://src.sencha.io/x50/http://sencha.com/files/u.jpg'," What does x50 represent?

The image will repeat in a tile format 50 times

The image will be reduced 50 pixels in resolution

The image will only take up 50% of the screen

The image will be 50px by 50px

Answer

Correct Answer: The image will only take up 50% of the screen

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13. How long does sencha.io src cache images?

Up to one day

One month

One hour

Seven days

Answer

Correct Answer: Up to one day

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14. Which sentence about Ext.data.Store is TRUE?

Stores cannot be sorted and filtered - in both cases either remotely or locally.

Proxy is required to load or read from Store.

The Store class saves any type of data with out any structures.

The Store class encapsulates a client side cache of Model objects.

Answer

Correct Answer: The Store class encapsulates a client side cache of Model objects.

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15. True or False? Classes that are not distributed by Sencha should never use Ext as the top-level namespace.

True

False

Answer

Correct Answer: True

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16. True or False? In Touch Charts, not all CSS style rules behave the same (or even work) in an .scss file.

False

True

Answer

Correct Answer: True

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17. What is Sencha.io Scr?

A cloud-based storage center to uploading, editing, and sharing your code

A Component that returns the screen size resolutions

A cloud-based tool to help you dynamically resize images to adapt to changes in device screen size

The source code for Sencha Touch

Answer

Correct Answer: A cloud-based tool to help you dynamically resize images to adapt to changes in device screen size

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18. Which of these are a valid character to include in a class name?

"~"

"$"

"7"

All are valid

Answer

Correct Answer: "7"

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19. What web technologies are used in Sencha?

HTML

All of these

CSS

JavaScript

Answer

Correct Answer: All of these

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20. True or False? Sencha 2.x has a backwards compatibility feature to assist in migrating your 1.x code.

False

True

Answer

Correct Answer: True

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21. Which naming convention should acronyms follow?

Unicase

Orthographic casework

CamelCase

Functiontype

Answer

Correct Answer: CamelCase

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22. What is Ext.container.Viewport?

A function declared in an App.js file to show the main home page of apps

A specialized container representing the viewable application area

A user defined Class in Sencha Touch

A card layout to which you can add application components

Answer

Correct Answer: A specialized container representing the viewable application area

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23. Which of these are capabilities of Components in Sencha Touch?

Render themselves onto the page using a template

Center themselves on the screen

All of these

Show and hide themselves at any time

Answer

Correct Answer: All of these

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24. What type of apps are developed through the Sencha Touch Framework?

OOPS based mobile apps that work on both Android and iOS

This framework is only used for Blackberry devices

Android based development apps that work on Androids

HTML5 based mobile apps that work on Android, iOS and Blackberry devices

Answer

Correct Answer: HTML5 based mobile apps that work on Android, iOS and Blackberry devices

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25. What is Sencha?

A rails framework

A MVC Javascript framework

A scripting language

A Java framework

Answer

Correct Answer: A MVC Javascript framework

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26. What does MVC stands for?

Multiple Views Controller

Mobile View Controller

Model View Controller

Main View Controller

Answer

Correct Answer: Model View Controller

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27. Why is it often a good idea to destroy Components when you know you won't need them any more?

To keep your proprietary code out of the hands of developers

You otherwise run the risk of bricking a users mobile device

Because most mobile devices have a limited amount of memory

You shouldn't ever destroy Components

Answer

Correct Answer: Because most mobile devices have a limited amount of memory

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28. What is a listener?

The initial set of data to apply to the tpl to update the content area of the Component

An object or array of objects that will provide custom functionality for this component

A config object containing one or more event handlers to be added to this object during initialization

The term used to describe users of your program

Answer

Correct Answer: A config object containing one or more event handlers to be added to this object during initialization

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29. Which of these are acceptable variable names?

var isGoodName

All are acceptable

var base64encoder

var xmlReader

Answer

Correct Answer: All are acceptable

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30. What is Xtype?

Xtype is used to describe the behavior of a Class

Xtype is function in Sencha Touch

Xtype is a sub Class in Sencha Touch

Xtype is an easy way to create components without having to use the full Class name

Answer

Correct Answer: Xtype is an easy way to create components without having to use the full Class name

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31. What is Ext?

Ext is used to access the Classes of Sencha Touch

Ext stands for External Function in Sencha Touch

Ext is a Class name in Sencha Touch

Ext is the global namespace for the whole Sencha Touch framework

Answer

Correct Answer: Ext is the global namespace for the whole Sencha Touch framework

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32. What is the function of Controllers?

Controllers manage Views, Views fire events, Controllers respond to them

Controllers control the architect of applications

Controllers control the overall application

Controllers are used to define the Listing functions

Answer

Correct Answer: Controllers manage Views, Views fire events, Controllers respond to them

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33. What is the function used to determine how the child Components should be organized and displayed on the screen?

varPanels

Layouts

Wireframes

Mockups

Answer

Correct Answer: Layouts

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34. What is the following code doing? Ext.define('App.new.CustomList' {extend: 'Ext.dataview, //...}); Ext.create(App.new.CustomList);

Defining the class App

Defining and instantiating a class App

Instantiating the class App

extending the class App

Answer

Correct Answer: Defining and instantiating a class App

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35. Which of these are unique problems in deploying web-based charts on mobile touch devices as opposed to desktop environments?

All of these

Accurately selecting data points in order to get detailed information is difficult with touch input

Hardware limitations make redrawing chart data very expensive

Small screen sizes limit the amount and complexity of data that you can display at once

Answer

Correct Answer: All of these

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36. What is the difference between VBox and HBox?

HBox is typically used for much larger file sizes

VBox is the updated version of HBox for Touch 2.0

VBox is vertical instead of horizontal

VBox is used for dynamic elements while HBox is used to static elements

Answer

Correct Answer: VBox is vertical instead of horizontal

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37. Which of these are methods of every config?

Yes and no

Open and close

Getter and setter

On and off

Answer

Correct Answer: Getter and setter

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38. What is the class "decode" shorthand for?

Ext.JSON.parse

Ext.JSON.decode

Ext.AJAX.decode

Ext.Loader.exclude

Answer

Correct Answer: Ext.JSON.decode

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39. The most basic Sencha application consists of, at least, each the following: the Sencha libraries, ___, JavaScript file containing the apps source code.

a controller

profiles

an index.html file

a css file

Answer

Correct Answer: an index.html file

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40. What are proxies responsible for?

Ensuring that your program will be compatible with all mobile devices

Protecting and encrypting user data

The actual loading and saving of data

Nothing special, they are just glorified arrays

Answer

Correct Answer: The actual loading and saving of data

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41. What is app.js?

App.js files control the application

App.js is a file to write the main Class of applications

The main Javascript entry point for your app

Special javascript file to embed Theme and code

Answer

Correct Answer: The main Javascript entry point for your app

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42. Which syntax should you use to get automatic getters and setters and have a much cleaner codebase?

Emptyfn

Applyfl

Config

Answer

Correct Answer: Config

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43. If we create a container 300px wide with flex configs of 1 and 2, what will be the pixel width of each of the flex items?

300px for item 1 and 0px for item 2

200px for item 1 and 100px for item 2

150px for item 1 and 150px for item 2

100px for item 1 and 200px for item 2

Answer

Correct Answer: 100px for item 1 and 200px for item 2

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44. True or False? Method names may only contain alphanumeric characters.

False

True

Answer

Correct Answer: True

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45. Jasmine is a JavaScript BDD library. What makes Jasmine special?

It does not require the DOM to work & it does not depend on other libraries

It requires the DOM to work

It does not require the DOM to work

It does not depend on other libraries

Answer

Correct Answer: It does not require the DOM to work & it does not depend on other libraries

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46. Class names should be properly namespaced using which notation?

Object property dot

Class property slash

Double colon object

Function rounded set

Answer

Correct Answer: Object property dot

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47. Which of the following is not a subclass of Text?

DatePicker

Password

checkboxfield

Answer

Correct Answer: checkboxfield

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48. During runtime applications can use the validate() method on model instance to trigger ____.

all the required validations

validation of Sencha standards

storage of valid data

returns a Boolean value in correspondence to whether an object has valid syntax

Answer

Correct Answer: all the required validations

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49. What is the name of the documentation tool provided by Sencha?

JDoc

YARD

Sphinx

JSDuck

Answer

Correct Answer: JSDuck

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50. Which of the following would be a proper implementation of createDelayed().

Ext.Function.createDelayed()

Ext.createDelayed()

Function.createDelayed

Ext.createDelayed.Fuction

Answer

Correct Answer: Ext.Function.createDelayed()

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51. Which of these is a technique for improving page load times when some browsers are not able to make large numbers of simultaneous requests to servers on the same domain?

Domain cutting

Domain cleaving

Domain fracturing

Domain sharding

Answer

Correct Answer: Domain sharding

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52. What is the great way to allow the user to swipe through multiple full-screen pages?

Using Ext.ScrollView

Using Ext.Carousel

There's no way to allow this feature

Using Ext.ScrollView.PageScrollView

Using Ext.PageScrollView

Answer

Correct Answer: Using Ext.Carousel

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53. What is Sencha Touch?

An object oriented programming language

A workspace for mobile devices

A communication tool for mobile devices

A high-performance HTML5 mobile application framework

Answer

Correct Answer: A high-performance HTML5 mobile application framework

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