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Basic .NET Framework MCQ

1. What does JIT do in .Net?

JIT is used for deployment, versioning, and security.

JIT translates the IL code to an assembly code and uses the CPU architecture of the target machine to execute a .NET application.

JIT compiles to C# code using .NET environment properties.

JIT is used for deployment, versioning, and security, and forces the computer's processor to execute the native machine code.

Answer

Correct Answer: JIT translates the IL code to an assembly code and uses the CPU architecture of the target machine to execute a .NET application.

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2. What is the difference between a heap and a stack?

The stack contains stored value types; the heap contains stored reference types.

The heap is stored value types; the stack is stored reference types.

The heap is stored object types; the stack is stored class types.

The stack is stored object types; the heap is stored class types.

Answer

Correct Answer: The stack contains stored value types; the heap contains stored reference types.

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3. Why would the .NET Framework use Econo-JIT (Just-inTime)?

To compile only the methods that are called at run time and then store them in cache for one minute

To compile only methods called at run time - which are compiled the first time the methods are called and then stored in cache to be used for execution when the same methods are called again

To compile complete source code into native code in a single compilation cycle during deployment of the application

To compile only the methods that are called at run time and remove them from memory after execution

Answer

Correct Answer: To compile only the methods that are called at run time and remove them from memory after execution

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4. What is the interface segregation principle?

Many client-specific interfaces are better than one general-purpose interface.

Software entities should be open for extension, but closed for modification.

A class should have only a single responsibility - that is, only changes to one part of the software's specification should be able to affect the specification of the class.

Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.

Answer

Correct Answer: Many client-specific interfaces are better than one general-purpose interface.

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5. Which statement about a read-only variable is not true?

It can be either static or an instance memeber.

At run time, its value is evaluated.

It can be initialized in either the constructor or the declaration.

It can be initialized at declaration only.

Answer

Correct Answer: It can be initialized at declaration only.

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6. What does IL stand for?

Intermediate Language

Intelligent Language

Intelligent Linq

Interpreted Language

Answer

Correct Answer: Intermediate Language

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7. What does CIL stand for?

C# Interpreted Language

Common Intermediate Language

Commonly Interpreted Language

C# Intermediate Language

Answer

Correct Answer: Common Intermediate Language

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8. Which choice best describes the difference between globalization and localization?

Localization enables the .NET runtime to provide services to managed code so language compilers can emit metadata and references in your code. Globalization reverses this process.

Globalization enables the .NET runtime to provide services to managed code so language compilers can emit metadata and references in your code. Localization reverses this process.

Localization involves designing and developing a world-ready app that supports localized interfaces and regional data for users in multiple cultures. Globalization is the process of translating an application's resources into versions for each culture that the application will support.

Globalization involves designing and developing a world-ready app that supports localized interfaces and regional data for users in multiple cultures. Localization is the process of translating an application's resources into versions for each culture that the application will support.

Answer

Correct Answer: Globalization involves designing and developing a world-ready app that supports localized interfaces and regional data for users in multiple cultures. Localization is the process of translating an application's resources into versions for each culture that the application will support.

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9. What method do you use to explicitly kill a user's session?

Session.Timeout()

Session.Abandon()

Session.KillAll()

Session.Remove()

Answer

Correct Answer: Session.Abandon()

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10. What is the Liskov substitution principle?

Many client-specific interfaces are better than one general-purpose interface.

Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.

A class should have only a single responsibility — that is, only changes to one part of the software's specification should be able to affect the specification of the class.

Software entities should be open for extension, but closed for modification.

Answer

Correct Answer: Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.

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11. The ASP.NET Core Module is a native IIS module that plugs into the IIS pipeline to either _.

Host an ASP.NET Code app inside of the IIS worker process, called the out-of-process hosting model, or forward web requests to a backend ASP.NET Core app running the Kesrel server, called the in-process hosting model

Create IIS code the server needs in a file with the extension required, or run the IIS server in a mode compatible for ASP.NET Core

Package up your C# application and C# packages into .NET modules, or specify which of its packages should be visible to other .NET modules

Host an ASP.NET Code app inside of the IIS workes process, called the in-process hosting model, or forward web requests to a backend ASP.NET Core app running the Kestrel server, called the out-of-process hosting model

Answer

Correct Answer: Host an ASP.NET Code app inside of the IIS workes process, called the in-process hosting model, or forward web requests to a backend ASP.NET Core app running the Kestrel server, called the out-of-process hosting model

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12. What is .NET?

.NET is a general-purpose programming language. The language has expanded significantly over time, and now has object-oriented, generic, and functional features in addition to facilities for low-level memory manipulation.

.NET is a virtual machine that enables a computer to run programs written in several languages and compile programs to bytecode.

.NET is an interpreted, high-level, general-purpose programming language. Its language constructs an object-oriented approach aimed at helping programmers write clear, logical code for small and large-scale projects.

.NET is a free, cross-platform, open-source developer platform for building many different types of applications with multiple languages, editors, and libraries for web, mobile, desktop, gaming, and IoT.

Answer

Correct Answer: .NET is a free, cross-platform, open-source developer platform for building many different types of applications with multiple languages, editors, and libraries for web, mobile, desktop, gaming, and IoT.

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13. Why would the .NET Framework use Normal-JIT (Just-in-Time)?

To compile complete source code into native code in a single compilation cycle during deployment of the application

To compile only the methods that are called at runtime and remove them from memory after execution

To compile only the methods that are called at runtime and them store them in cache for one minute

To compile only methods called at runtime – which are compiled the first time the methods are called and then stored in a cache to be used for execution when the same methods are called again

Answer

Correct Answer: To compile only methods called at runtime – which are compiled the first time the methods are called and then stored in a cache to be used for execution when the same methods are called again

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14. When should you use the .NET Core class library project type?

When you want to increase the .NET API surface area your library can access, and allow only .NET Core apps to be compatible with your library

When you want to increase the number of apps that are compatible with your library, and decrease the .NET API surface area your library can access

When you want to decrease speed but have more features

When you want to increase compilation speed and have fewer features

Answer

Correct Answer: When you want to increase the .NET API surface area your library can access, and allow only .NET Core apps to be compatible with your library

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15. Which choice is NOT a component of .NET Framework?

Common language JIT

.NET framework class library

Common language runtime

Side-by-side execution

Answer

Correct Answer: .NET framework class library

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16. What is a task?

The basic unit to which an operating system allocates processor time

A program that is running on your compiler

A single operation that does not return a value and that usually executes asynchronously

A series of related methods that together turn inputs into outputs

Answer

Correct Answer: A single operation that does not return a value and that usually executes asynchronously

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17. Why use design patterns?

Design patterns make the code more efficient with memory usage

Design patterns minimize the number of code lines when creating complex applications

Design patterns tend to be more secure and prevent code from being hacked

Design patterns help you solve issues related to sofware development using a proven solution, and make communication between developers more efficient

Answer

Correct Answer: Design patterns help you solve issues related to sofware development using a proven solution, and make communication between developers more efficient

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18. Where should you store connection string information?

In any file within the namespace of the program

In the view

In configuration files

In the database

Answer

Correct Answer: In configuration files

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19. How can you recieve form data without a model binder in a controller action? Note: The differences are IFormResult/IActionResult and Forms/Form

Public IFormResult ReceivedDataByRequest() { string theName = Request.Forms[

Public IActionResult ReceivedDataByRequest() { string theName = Request.Forms[

Public IFormResult ReceivedDataByRequest() { string theName = Request.Form[

Public IActionResult ReceivedDataByRequest() { string theName = Request.Form[

Answer

Correct Answer: Public IActionResult ReceivedDataByRequest() { string theName = Request.Form[

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20. Which choice creates an 8-tuple containing prime numbers that are less than 20?

Var primes = Tuple.Create(2, 3, 5, 7, 11, 13, 17, 19);

Var primes = Tuple.Create(2, 3, 5, 7, 11, 13, 17, 21);

Var primes = Tuple.Make(2, 3, 5, 7, 11, 13, 17, 20);

Var primes = Tuple.Make(2, 3, 5, 7, 11, 13, 17, 19);

Answer

Correct Answer: Var primes = Tuple.Create(2, 3, 5, 7, 11, 13, 17, 19);

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21. You want to add responsibilities to object dynamically. Which design pattern best fit this objective?

Decorator

Bridge

Singleton

Facade

Answer

Correct Answer: Decorator

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22. What is a thread?

A single operation that does not return a value and that usually executes asynchronously

The basic unit to which an operating system allocate processor time

A series of related tasks or methods that together turn inputs into outputs

A program that is running on your computer

Answer

Correct Answer: A single operation that does not return a value and that usually executes asynchronously

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23. Which statement describes a Dispose method?

It defines an execution environment for program code and manages the CLR

It belongs to the IDisposable interface and is used to free resources, such as network connection and files.

It is partially method-compiled code library for use in deployment, versioning, and security.

It is used for encapsulation of collections tied to functions of a class and object.

Answer

Correct Answer: It belongs to the IDisposable interface and is used to free resources, such as network connection and files.

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24. Why would you use ahead-of-time (AOT) compilation?

You can deliver a faster startup time, especially in big applications where much code executes on startup.

You have a slow processor.

You have little memory and disk space

The JIT compiler does not have to do a lot of disk I/O actions, which are quite expensive.

Answer

Correct Answer: You can deliver a faster startup time, especially in big applications where much code executes on startup.

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25. _ pattern works as a bridge between two incompatible interfaces? // wording in question is maybe changed?

Adapter

Bridge

Singleton

Builder

Answer

Correct Answer: Adapter

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26. What is CIL?

Formerly known as MSIL, CIL is a programming language that NET developers use. It represents the lowest possible level for a language that humans can still read.

CIL is an object-oriented programming language that is a partially compiled code that .NET developers will then compile to native machine code.

CIL is used to convert a value type to an object type.

CIL is a compiled code library that Microsoft developed as an open specification. Developers use it for security, versioning, and deployment purposes.

Answer

Correct Answer: Formerly known as MSIL, CIL is a programming language that NET developers use. It represents the lowest possible level for a language that humans can still read.

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27. What is the purpose of CLR?

CLR performs various operations such as security checks, spell checks, assembly loading, and thread management. It provides a secure execution environment for the internet.

CLR sets the rules developers must use for the components that are interlanguage compatible. CLR is reusable across all the .NET-compliant languages.

CLR is a compiler that converts Intermediate Language to a native code.

CLR performs various operations such as memory management, security checks, assembly loading, and thread management. It also provides a secure execution environment for applications.

Answer

Correct Answer: CLR performs various operations such as memory management, security checks, assembly loading, and thread management. It also provides a secure execution environment for applications.

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28. Which is NOT true about a constant variable?

At compile time, the value is evaluated.

Only at declaration can it be initialized.

At runtime, its value is evaluated.

It cannot be static.

Answer

Correct Answer: At runtime, its value is evaluated.

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29. Which of the following selects an anonymous type?

Select new { a.Country, a.Region }

Select a

Select a.Country, a.Region

Select { a.Country, a.Region }

Answer

Correct Answer: Select new { a.Country, a.Region }

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30. What is a namespace?

A group of generic collections—in a logical hierarchy by function—that enable you to access the core functionality you need in your applications

A group of methods—in a logical hierarchy by class—that enable you to access the core functionality you need in .NET

A group of assemblies—in a logical hierarchy by function—that enable you to access the core functionality you need in your applications

A group of classes, structures, interfaces, enumerations, and delegates—organized in a logical hierarchy by function that enable you to access the core functionality you need in your applications

Answer

Correct Answer: A group of classes, structures, interfaces, enumerations, and delegates—organized in a logical hierarchy by function that enable you to access the core functionality you need in your applications

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31. What is the dependency inversion principle?

Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.

A class should have only a single responsibility—that is, only changes to one part of the software's specification should be able to affect the specification of the class.

Software entities should be open for extension, but closed for modification.

Entities must depend on abstractions, not on concrete implementations.

Answer

Correct Answer: Entities must depend on abstractions, not on concrete implementations.

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32. You want to create a class of which only a single instance can exist. Which design pattern best fits this objective?

Adapter

Singleton

Bridge

Decorator

Answer

Correct Answer: Singleton

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33. You must connect an app to an online identity provider using OAuth. For authentication, the app uses WebAuthenticationBroker object. You need to make sure the app registers with the provider. Which action do you take?

Construct an HTTP request URI and an HTTPS request URI.

Invoke the GetCurrentApplicationCallbackUri method and construct an HTTPS request URI.

Invoke the AuthenticateAsync and GetCurrentApplicationCallbackUri methods.

Invoke the AuthenticateAsync method and construct an HTTPS request URI.

Answer

Correct Answer: Invoke the AuthenticateAsync method and construct an HTTPS request URI.

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34. What do code contracts do?

Code contracts are data structures that can operate on demand per requirements.

Code contracts provide a way to specify preconditions, postconditions, and object invariants in your code.

Code contracts contain definitions for a group of related functionalities that a class or a struct can implement.

Code contracts contain data structures for a group of related functionalities that a class or a struct can implement.

Answer

Correct Answer: Code contracts provide a way to specify preconditions, postconditions, and object invariants in your code.

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35. Why would Pre-JIT be used by the .NET Framework?

To compile only the methods that are called at runtime and store those methods in cache after execution

To compile complete source code into native code in a single compilation cycle during deployment of the application

To compile only the methods that are called at runtime and then store them in cache for one minute

To compile only the methods that are called at runtime and remove them from memory after execution

Answer

Correct Answer: To compile complete source code into native code in a single compilation cycle during deployment of the application

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36. You want to encapsulate a command request as an object. Which design pattern best fits this objective?

Command

Iterator

Facade

Observer

Answer

Correct Answer: Command

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37. You want to separate object construction from its representation. Which design pattern best fits this objective?

Adapter

Bridge

Singleton

Builder

Answer

Correct Answer: Builder

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38. When break is used inside two nested for loops, does control come out of the inner for loop or the outer for loop?

It breaks from only the outer loop.

It breaks from all loops.

It breaks from only the inner loop.

It breaks from the outer loop after the second iteration.

Answer

Correct Answer: It breaks from only the inner loop.

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39. What is the difference between System.String and string?

String is used for fied-size strings in C#, while System.String is used for all the strings.

There is no such class as System.String.

There is none—string is an alias for System. String.

System.String is a VB.NET data type, while string is a C# type.

Answer

Correct Answer: There is none—string is an alias for System. String.

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40. Which is NOT true about a read-only variable?

At runtime, its value is evaluated.

It can be either static or an instance member.

It can be initialized at declaration only.

It can be initialized in either the constructor or the declaration.

Answer

Correct Answer: It can be initialized at declaration only.

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41. Which is NOT true about lambda statements?

A statement lambda cannot return a value.

If a statement lambda has a return value, it has to use a return statement.

A statement lambda requires using curly braces.

A statement lambda can have more than one statement.

Answer

Correct Answer: A statement lambda cannot return a value.

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42. What does CAS stand for and what does it do?

CAS stands for Code Application Secrets and it enables users to restrict, on a very granular level, what hidden code can do according to a level of trust for an application.

CAS stands for Code Access Secrets and it enables users to restrict, on a very granular level, what hidden code can do according to a level of trust.

CAS stands for Cognitive Access Security and it enables users to restrict security logic manipulation.

CAS stands for Code Access Security and it enables users to restrict, on a very granular level, what managed code can do according to a level of trust.

Answer

Correct Answer: CAS stands for Code Access Security and it enables users to restrict, on a very granular level, what managed code can do according to a level of trust.

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43. What is an interface in .NET?

An interface provides a partial implementation for functionality and some abstract or virtual members that must be implemented by the inheriting entities. It can declare fields too.

An interface is responsible for keeping track of what is actually executing and where each executing thread is.

An interface allows developers to create new classes that reuse, extend, and modify the behavior defined in other classes.

An interface declares a contract or behavior that implementing classes require. It may declare only properties, methods, and events with no access modifiers. All the declared members must be implemented.

Answer

Correct Answer: An interface declares a contract or behavior that implementing classes require. It may declare only properties, methods, and events with no access modifiers. All the declared members must be implemented.

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44. What is the namespace for caching information in .NET?

System.Data.Caching;

All.System.Caching;

System.Runtime.Caching;

System.Compiler.Caching;

Answer

Correct Answer: System.Runtime.Caching;

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45. What is an abstract class in .NET?

An abstract class provides a partial implementation for functionality and some abstract or virtual members that must be implemented by the inheriting entities. It can declare fields too.

An abstract class allows developers to create new classes that reuse, extend, and modify the behavior defined in other classes.

An abstract class is responsible for keeping track of what is actually executing and where each executing thread is.

An abstract class declares a contract or behavior that implementing classes require. It may declare only properties, methods, and events with no access modifiers. All the declared members must be implemented.

Answer

Correct Answer: An abstract class provides a partial implementation for functionality and some abstract or virtual members that must be implemented by the inheriting entities. It can declare fields too.

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46. Assuming y is a value type, which is an example of boxing?

Y = (int)thisObject;

Int y = 3;

Y = (int)thisObject=;3;

Object thisObject = y;

Answer

Correct Answer: Object thisObject = y;

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47. What is the Common Type System (CTS)?

The component of CLR in which .NET Framework provides support for several languages since it contains a type system that is common with all the languages

The component of CLI in which .NET Framework provides support for several languages since it contains a type system that is common with all the languages

The component of CLR that allows you to map the content of a file to the logical address of an application

The component of CLR that enables you to run multiple versions of an application or component and CLR on the same computer at the same time

Answer

Correct Answer: The component of CLI in which .NET Framework provides support for several languages since it contains a type system that is common with all the languages

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48. What is the difference between a SDK (software development kit) and runtime in .NET Core?

The SDK is the virtual machine that hosts and runs the application and abstracts all the interaction with the operating system; the runtime usually includes documentation and other help files

The runtime is the virtual machine that hosts and runs the application and abstracts all the interaction with the operating system; the SDK usually includes documentation and other help files.

The runtime compiles code along with the CLR; the SDK usually includes documentation and other help files.

The SDK compiles code along with the CLR; the runtime usually includes documentation and other help files.

Answer

Correct Answer: The runtime is the virtual machine that hosts and runs the application and abstracts all the interaction with the operating system; the SDK usually includes documentation and other help files.

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49. When should a developer use the .NET Standard class library project type?

When you want to increase the .NET API surface area your library can access, and allow only .NET Core apps to be compatible with your library

When you want to increase the number of apps that are compatible with your library, and decrease the .NET API surface area your library can access

When you want to decrease speed but have more features

When you want to increase compilation speed and have fewer features

Answer

Correct Answer: When you want to increase the number of apps that are compatible with your library, and decrease the .NET API surface area your library can access

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

50. What is the single responsibility principle?

Software entities should be open for extension, but closed for modification.

Entities must depend on abstractions, not on concrete implementations.

Objects in a program should be repleaceble with instances of their subtypes without altering the correctness of that programm.

A class should have only a single responsibility - that is, only changes to one part of the software's specification should be able to affect the specification of the class.

Answer

Correct Answer: A class should have only a single responsibility - that is, only changes to one part of the software's specification should be able to affect the specification of the class.

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51. Which is a set of features that extends the query capabilities of the .NET language syntax by adding sets of new standard query operators that allow data manipulation, regardless of the data source?

XML

LINQ

XAML

Answer

Correct Answer: LINQ

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52. What is a delegate?

A delegate is an object or collection initializer that adds flexibility, readability and maintainability in C#.

A delegate in .NET is similar to a function pointer in C or C++. Using a delegate allows the programmer to encapsulate a reference to a method inside a delegate object.

A delegate is a collection initializer that adds flexibility, readability and maintainability in .NET.

A delegate is an extension method. Using a delegate allows the programmer to add flexibility, readability and maintainability in .NET.

Answer

Correct Answer: A delegate in .NET is similar to a function pointer in C or C++. Using a delegate allows the programmer to encapsulate a reference to a method inside a delegate object.

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53. What happens when you concatenate two strings?

You cannot concatenate strings in .NET.

The second string object is modified so it contains the concatenated strings.

A third string object is created containing the concatenated strings.

The first string object is modified so it contains the concatenated strings.

Answer

Correct Answer: A third string object is created containing the concatenated strings.

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54. What makes a strong-named assembly?

An assembly with the version specified

A signed assembly

An assembly with culture information

An assembly with the name marked as important

Answer

Correct Answer: A signed assembly

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55. Which code do you use if you want to trigger a garbage collection in .NET?

Garbage.CleanUp();

System.GC.Clear();

System.GC.Collect();

Garbage.Collect();

Answer

Correct Answer: System.GC.Collect();

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56. When you define an abstract method, how do you use it in a derived class?

Abstract methods cannot be used in derived classes.

In your derived class, overload the method.

In your derived class, override the method.

In your derived class, declare the method as virtual.

Answer

Correct Answer: In your derived class, override the method.

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57. What is CoreCLR?

CoreCLR is a component that allows the highest degree of control when coding; you can Abort(), Suspend() or Resume().

CoreCLR is the .NET execution engine that runs the source code. Special programs called compilers must rewrite it into MSIL.

CoreCLR is the .NET execution engine the runs the source code. Special programs called compilers must rewrite it into IL.

CoreCLR is the .NET execution engine in .NET Core that performs functions like garbage collection and compilation to machine code.

Answer

Correct Answer: CoreCLR is the .NET execution engine in .NET Core that performs functions like garbage collection and compilation to machine code.

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58. When would you use asynchronous actions?

To release the quest thread of a I/O operation

To capture the request thread of a I/O operation

To avoid blocking the request thread while waits for an I/O operation

To block the request thread if it waits for an I/O operation

Answer

Correct Answer: To avoid blocking the request thread while waits for an I/O operation

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59. What is Kestrel?

An iOS web server initially that was later designed to work with .NET Core

A cross-platform web server ASP.NET Core that is included by default in ASP.NET Core project templates**

A cross-platform, open-source web server that starts up web APIs

A free and open-source cross-platform web server software that can communicate with IIS

Answer

Correct Answer: A cross-platform web server ASP.NET Core that is included by default in ASP.NET Core project templates**

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60. Which group contains all official types of JIT compilations?

Pre-JIT, Quick-JIT, Coll-JIT

Before-JIT, Quick-JIT, Cool-JIT

Pre-JIT, Quick-JIT, Normal-JIT

Pre-JIT, Econo-JIT, Normal-JIT

Answer

Correct Answer: Pre-JIT, Econo-JIT, Normal-JIT

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61. What is the difference between a stack and queue?

Queues process value types by a top-down hierarchy - first in, first out (FIFO). Stacks follow this principle and insert items from the lower end while deleting ones from the top - last in, first-out (LIFO).

Queues process value types by a top-down hierarchy-last in, first-out (LIFO). Stacks follow this principle and insert items from the lower end while deleting ones from the top-first in, first-out (FIFO).

Stacks process value types by a top-down hierarchy - last in, first-out (LIFO). Queues follow this principle and insert items from the lower end while deleting ones from the top - first in, first-out (FIFO)

Stacks process value types by a top-down hierarchy-first in, first out (FIFO). Queues follow this principle and insert items from the lower end while deleting ones from the top-last in, first-out (LIFO).

Answer

Correct Answer: Stacks process value types by a top-down hierarchy - last in, first-out (LIFO). Queues follow this principle and insert items from the lower end while deleting ones from the top - first in, first-out (FIFO)

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