.NET Framework interview questions

1. Which of the following is not a .NET compatible language?

A. C#, J#

B. VB.NET

C. Managed C++

D. Java

Correct Answer is : Java

2. Common language specification (CLS)

A. Is an execution engine for all .NET

B. Is similar to JVM as in Java.

C. Defines standard rules for defining .NET compliant languages.

D. Is a compiler.

Correct Answer is : Defines standard rules for defining .NET compliant languages.

3. Which of the following statements is correct about Managed Code?

A. Managed code is the code that is compiled by the JIT compilers.

B. Managed code is the code where resources are Garbage Collected.

C. Managed code is the code that runs on top of Windows.

D. Managed code is the code that is written to target the services of the CLR.

Correct Answer is : Managed code is the code that is written to target the services of the CLR.

4. Which of the following utilities can be used to compile managed assemblies into processor-specific native code?

A. Gacutil

B. Ngen

C. Sn

D. Dumpbin

Correct Answer is : Ngen

5. Which of the following statement is not correct?

A. CLR is an execution engine of .NET.

B. Assembly is a logical unit of deployment.

C. CLR executes managed code.

D. .NET provides cross language interoperability using code access security.

Correct Answer is : .NET provides cross language interoperability using code access security.

6. Which of the following most accurately describe the primary role of a supervisor within an organization?

A. Facilitator

B. Collaborator

C. Advocate

D. Expert

Correct Answer is : Facilitator

7. The term supervisor is generally used to refer to individuals at which of the following levels of management?

A. Top

B. Middle

C. Executive

D. First

Correct Answer is : First

8. An individual with supervisory management responsibility would be most likely to oversee which of the following?

A. Technician

B. Division head

C. CEO

D. Branch manager

Correct Answer is : Technician

9. If a supervisor can perform certain job duties more efficiently than an employee, the supervisor should generally

A. Perform the employee's duties personally

B. Avoid stepping in, unless there is a personnel shortage

C. Transfer the employee to another department

D. Penalize the employee for lack of competence

Correct Answer is : Avoid stepping in, unless there is a personnel shortage

10. First-level supervisory usually rely most heavily on which of the following types of skills?

A. Technical skills

B. Administrative skills

C. Human relations skills

D. Conceptual skills

Correct Answer is : Human relations skills

11. What is the purpose of the Global Assembly Cache (GAC) in .NET Framework?

A. To store shared assemblies that are globally accessible

B. To store user-specific configuration settings

C. To cache web pages for faster loading

D. To store temporary data during runtime

Correct Answer is : The GAC is used to store shared assemblies that can be accessed by multiple applications.

12. What is the purpose of the App.config file in a .NET application?

A. To store application configuration settings

B. To define the layout of the user interface

C. To store database connection strings

D. To manage user authentication

Correct Answer is : The App.config file is used to store application-specific configuration settings.

13. Which of the following is NOT a valid data type in .NET Framework?

A. Decimal

B. Char

C. Double

D. Currency

Correct Answer is : Currency is not a valid data type in .NET Framework, you would use Decimal instead.

14. What is the purpose of the IDisposable interface in .NET Framework?

A. To release unmanaged resources

B. To define properties and methods for a class

C. To serialize objects

D. To handle exceptions

Correct Answer is : The IDisposable interface is used to release unmanaged resources and implement proper resource cleanup.

15. What is the purpose of the using statement in C#?

A. To automatically dispose of resources

B. To declare variables

C. To define conditional statements

D. To perform type casting

Correct Answer is : The using statement is used to automatically dispose of resources when they are no longer needed.

16. What is the difference between a struct and a class in .NET Framework?

A. A struct is a value type, while a class is a reference type

B. A struct cannot have methods, while a class can

C. A struct cannot inherit from another struct, while a class can inherit from another class

D. A struct can be instantiated without using the 'new' keyword, while a class cannot

Correct Answer is : A struct is a value type and is stored on the stack, while a class is a reference type and is stored on the heap.

17. What is the purpose of the async and await keywords in C#?

A. To define asynchronous operations

B. To handle exceptions

C. To declare variables

D. To perform type casting

Correct Answer is : The async and await keywords are used to define and await asynchronous operations in C#.

18. What is the difference between IEnumerable and IQueryable in .NET Framework?

A. IEnumerable is for in-memory collection manipulation, while IQueryable is for querying a database

B. IEnumerable is for querying a database, while IQueryable is for in-memory collection manipulation

C. IEnumerable is a class, while IQueryable is an interface

D. IEnumerable is synchronous, while IQueryable is asynchronous

Correct Answer is : IEnumerable is used for in-memory collection manipulation, while IQueryable is used for querying a database and supports deferred execution.

19. What is the purpose of the Entity Framework in .NET Framework?

A. To provide an object-relational mapping (ORM) framework

B. To create user interfaces

C. To handle network communication

D. To manage database connections

Correct Answer is : The Entity Framework is used to provide an object-relational mapping (ORM) framework for interacting with databases in .NET applications.

20. What is the purpose of the try...catch block in C#?

A. To handle exceptions and prevent application crashes

B. To define variables

C. To create asynchronous operations

D. To perform type casting

Correct Answer is : The try...catch block is used to handle exceptions and prevent application crashes by catching and handling errors.

21. What is the purpose of the Global Assembly Cache (GAC) in the .NET Framework?

A. To store shared assemblies that are globally accessible

B. To store user-specific configuration settings

C. To store temporary files during compilation

D. To store database connection strings

Correct Answer is : The GAC is used to store shared assemblies that can be accessed by multiple applications.

22. Which of the following is NOT a valid access modifier in C# within the .NET Framework?

A. Public

B. Private

C. Protected Internal

D. Package

Correct Answer is : Package is not a valid access modifier in C#, the correct term is internal.

23. What is the purpose of the Dispose method in C#?

A. To release unmanaged resources

B. To initialize a new object

C. To handle exceptions

D. To call a base class method

Correct Answer is : Dispose is used to release unmanaged resources held by an object.

24. Which of the following is a valid way to implement multithreading in C# using the .NET Framework?

A. Using the Thread class

B. Using the Singleton pattern

C. Using the sealed keyword

D. Using the IDisposable interface

Correct Answer is : The Thread class is used for creating and managing threads in C# for multithreading.

25. What is the purpose of the ConfigurationManager class in the .NET Framework?

A. To read application settings from configuration files

B. To manage database connections

C. To handle user authentication

D. To create custom exceptions

Correct Answer is : ConfigurationManager is used to read application settings from configuration files in .NET applications.

26. Which of the following is NOT a valid data type in C# within the .NET Framework?

A. Decimal

B. Char

C. Float32

D. String

Correct Answer is : Float32 is not a valid data type in C#, the correct term is Single for a 32-bit floating point number.

27. What is the purpose of the using statement in C# within the .NET Framework?

A. To ensure that IDisposable objects are properly disposed

B. To declare a new variable

C. To define a namespace

D. To handle exceptions

Correct Answer is : The using statement is used to ensure that IDisposable objects are properly disposed when they are no longer needed.

28. In C#, what is the difference between the ref and out keywords within the .NET Framework?

A. ref parameters must be initialized before passing them to a method, while out parameters do not.

B. out parameters must be initialized before passing them to a method, while ref parameters do not.

C. There is no difference between ref and out parameters in C#.

D. out parameters can only be used with value types, while ref parameters can be used with reference types.

Correct Answer is : ref parameters must be initialized before passing them to a method, whereas out parameters do not require initialization.

29. What is the purpose of the async and await keywords in C# within the .NET Framework?

A. To define synchronous methods

B. To create new threads

C. To enable asynchronous programming

D. To handle exceptions

Correct Answer is : The async and await keywords are used to enable asynchronous programming in C# to improve responsiveness.

30. Which of the following is true about the Common Language Runtime (CLR) in the .NET Framework?

A. It is responsible for managing memory and handling exceptions

B. It is specific to Windows operating systems only

C. It is used for compiling C# code to machine code

D. It is a programming language

Correct Answer is : The CLR in the .NET Framework is responsible for memory management and exception handling in managed code.

31. What is the purpose of the .NET Framework?

A. To provide a platform for building applications and services

B. To manage hardware resources efficiently

C. To optimize database queries

D. To design user interfaces

Correct Answer is : The .NET Framework provides a platform for building applications and services.

32. Which of the following languages is NOT supported by the .NET Framework?

A. C#

B. Java

C. VB.NET

D. F#

Correct Answer is : Java is not supported by the .NET Framework.

33. What is the Common Language Runtime (CLR) in the .NET Framework responsible for?

A. Memory management

B. Database management

C. User interface design

D. Network protocols

Correct Answer is : The CLR in the .NET Framework is responsible for memory management.

34. What is a namespace in the .NET Framework?

A. A collection of classes and other types

B. A data storage unit

C. A user interface component

D. A network protocol

Correct Answer is : A namespace in the .NET Framework is a collection of classes and other types.

35. What is the role of the JIT compiler in the .NET Framework?

A. To convert Intermediate Language (IL) code into native machine code

B. To manage database queries

C. To handle user input

D. To optimize memory usage

Correct Answer is : The JIT compiler in the .NET Framework converts IL code into native machine code.

36. What is the purpose of the Common Type System (CTS) in the .NET Framework?

A. To ensure type safety across languages

B. To manage network protocols

C. To optimize code execution

D. To design user interfaces

Correct Answer is : The CTS in the .NET Framework ensures type safety across languages.

37. What is the purpose of the Common Language Specification (CLS) in the .NET Framework?

A. To establish rules that language compilers must follow

B. To handle user interfaces

C. To manage network protocols

D. To optimize database queries

Correct Answer is : The CLS in the .NET Framework establishes rules for language compilers to follow.

38. What is the purpose of the Intermediate Language (IL) code in the .NET Framework?

A. To provide a platform-independent representation of code

B. To manage hardware resources

C. To design user interfaces

D. To optimize database queries

Correct Answer is : IL code in the .NET Framework provides a platform-independent representation of code.

39. What is the purpose of the Globalization and Localization features in the .NET Framework?

A. To support multilingual applications

B. To manage memory usage

C. To optimize network communication

D. To design user interfaces

Correct Answer is : Globalization and Localization features in the .NET Framework support multilingual applications.

40. What is the purpose of the Common Language Runtime (CLR) in the .NET Framework?

A. To provide a runtime environment for executing managed code

B. To compile source code into machine code

C. To manage memory allocation in applications

D. To provide a set of pre-built classes for common tasks

Correct Answer is : The CLR provides a runtime environment for executing managed code in the .NET Framework.

41. Which of the following is an advantage of using ASP.NET MVC over Web Forms in the .NET Framework?

A. Better control over HTML markup and URLs

B. Automatic state management for controls

C. Faster development with drag-and-drop controls

D. Built-in support for server-side controls

Correct Answer is : ASP.NET MVC provides better control over HTML markup and URLs compared to Web Forms.

42. What is the purpose of the Web.config file in an ASP.NET application?

A. To store configuration settings for the application

B. To define the layout and design of the website

C. To store user-specific data for the application

D. To manage server-side controls in the application

Correct Answer is : The Web.config file is used to store configuration settings for an ASP.NET application.

43. What is the purpose of the Entity Framework in the .NET Framework?

A. To provide an object-relational mapping (ORM) framework

B. To handle user authentication and authorization

C. To generate HTML markup for web pages

D. To create reusable UI components

Correct Answer is : The Entity Framework is used as an object-relational mapping (ORM) framework in the .NET Framework.

44. Which of the following is true about asynchronous programming in the .NET Framework?

A. It allows non-blocking execution of code for improved performance

B. It can only be used in desktop applications

C. It is not supported in C# programming language

D. It requires synchronous execution of code

Correct Answer is : Asynchronous programming in .NET allows non-blocking execution of code for improved performance.

45. What is the purpose of the StringBuilder class in the .NET Framework?

A. To efficiently manipulate strings without creating new string objects

B. To provide encryption and decryption capabilities

C. To format data for display in a user interface

D. To manage network connections in the application

Correct Answer is : The StringBuilder class allows efficient manipulation of strings without creating new string objects in .NET applications.

46. What is the purpose of the IDisposable interface in the .NET Framework?

A. To release unmanaged resources used by a class

B. To manage user authentication in the application

C. To handle exceptions in the code

D. To define properties and methods for a class

Correct Answer is : The IDisposable interface is used to release unmanaged resources used by a class in the .NET Framework.

47. What is the purpose of the LINQ (Language Integrated Query) in the .NET Framework?

A. To provide a unified query syntax for querying data sources

B. To handle user interface events in the application

C. To manage multi-threading in the application

D. To generate reports based on database queries

Correct Answer is : LINQ provides a unified query syntax for querying data sources in the .NET Framework.

48. Which of the following is true about the .NET Framework's Garbage Collector?

A. It automatically manages memory by reclaiming unused objects

B. It requires manual intervention to release memory

C. It only works for managed code

D. It can cause memory leaks in applications

Correct Answer is : The Garbage Collector in the .NET Framework automatically manages memory by reclaiming unused objects.

49. Which of the following is NOT a valid type of memory management in .NET Framework?

A. Garbage collection

B. Manual memory management

C. Automatic reference counting

D. Stack allocation

Correct Answer is : Manual memory management is not supported in .NET Framework as it relies on garbage collection.

50. What is the purpose of the ASP.NET State Management?

A. To store user-specific data across multiple requests

B. To manage server hardware resources

C. To optimize database queries

D. To handle HTTP requests

Correct Answer is : ASP.NET State Management is used to store user-specific data across multiple requests for a web application.

51. Which of the following is NOT a valid authentication mode in ASP.NET?

A. Windows Authentication

B. Forms Authentication

C. Basic Authentication

D. Token Authentication

Correct Answer is : Token Authentication is not a standard authentication mode in ASP.NET.

52. What is the purpose of the Entity Framework in .NET?

A. Object-relational mapping

B. Data encryption

C. Compression algorithms

D. Network protocols

Correct Answer is : Entity Framework is used for object-relational mapping to simplify database interactions.

53. Which of the following is NOT a valid component of the .NET Framework Class Library (FCL)?

A. System.IO

B. System.Web

C. System.Data

D. System.Graphics

Correct Answer is : System.Graphics is not a component of the .NET Framework Class Library.

54. Which of the following is NOT a valid feature of ASP.NET MVC?

A. Model binding

B. Viewstate

C. Routing

D. Action filters

Correct Answer is : Viewstate is not a feature of ASP.NET MVC as it is specific to WebForms.

55. What is the purpose of the ConfigurationManager class in .NET?

A. To access application configuration settings

B. To manage user sessions

C. To handle database connections

D. To optimize network protocols

Correct Answer is : The ConfigurationManager class is used to access application configuration settings in .NET applications.

56. Which of the following is NOT a valid type of deployment in .NET Framework?

A. XCopy deployment

B. ClickOnce deployment

C. FTP deployment

D. Windows Installer deployment

Correct Answer is : FTP deployment is not a standard deployment method in .NET Framework.

57. What is the purpose of the JIT (Just-In-Time) compiler in the .NET Framework?

A. To convert MSIL code into native machine code during runtime

B. To optimize SQL queries before execution

C. To manage memory allocation in .NET applications

D. To handle exception handling in .NET applications

Correct Answer is : JIT compiler converts MSIL code into native machine code during runtime for execution.

58. What is the purpose of the AppDomain in the .NET Framework?

A. To provide isolation and security boundaries for executing managed code

B. To manage user interface components in Windows applications

C. To control database connections in ASP.NET applications

D. To handle asynchronous programming in .NET applications

Correct Answer is : AppDomain provides isolation and security boundaries for executing managed code.

59. What is the difference between Value Types and Reference Types in .NET Framework?

A. Value types are stored on the heap, while reference types are stored on the stack

B. Value types hold a reference to the data, while reference types store the data directly

C. Value types are immutable, while reference types are mutable

D. Value types are passed by reference, while reference types are passed by value

Correct Answer is : Value types are immutable, meaning their values cannot be changed after creation.

60. What is the role of the Common Language Runtime (CLR) in the .NET Framework?

A. To compile source code into machine code

B. To manage memory allocation and garbage collection

C. To handle user authentication in web applications

D. To optimize database queries

Correct Answer is : CLR manages memory allocation and garbage collection in .NET applications.

61. What is the purpose of the ConfigurationManager class in .NET Framework?

A. To manage configuration settings for an application

B. To handle file I/O operations

C. To create user interfaces dynamically

D. To encrypt sensitive data in a database

Correct Answer is : ConfigurationManager class is used to manage configuration settings for an application.

62. What is the role of the Globalization and Localization in .NET Framework?

A. To handle multi-threading in .NET applications

B. To format data based on cultural settings and translate user interface elements

C. To optimize performance of database queries

D. To manage encryption and decryption of data

Correct Answer is : Globalization and Localization are used to format data based on cultural settings and translate user interface elements.

63. What is the purpose of Reflection in .NET Framework?

A. To encrypt data in transit

B. To dynamically inspect and invoke types at runtime

C. To handle network communications

D. To manage user permissions in an application

Correct Answer is : Reflection allows for dynamically inspecting and invoking types at runtime in .NET applications.

64. What is the role of the Web.config file in ASP.NET applications?

A. To store user credentials securely

B. To define configuration settings for the application

C. To handle client-side validation

D. To manage server-side caching

Correct Answer is : Web.config file is used to define configuration settings for ASP.NET applications.

65. What is the purpose of the Common Language Runtime (CLR) in .NET Framework?

A. To provide a runtime environment for executing managed code

B. To provide a database management system

C. To provide a user interface for applications

D. To provide a development environment for writing code

Correct Answer is : The CLR is responsible for executing managed code and providing various services like garbage collection and exception handling.

66. What is the purpose of the JIT compiler in .NET Framework?

A. To convert Intermediate Language (IL) code into native machine code

B. To optimize database queries

C. To manage memory allocation for the application

D. To handle user authentication

Correct Answer is : The JIT compiler converts IL code into native machine code at runtime for execution.

67. What is the purpose of the System.IO namespace in .NET Framework?

A. To provide classes for input and output operations

B. To provide classes for encryption and decryption

C. To provide classes for user interface design

D. To provide classes for database connectivity

Correct Answer is : The System.IO namespace in .NET Framework contains classes for input and output operations like reading and writing files.

68. What is the purpose of the ASP.NET MVC framework in .NET Framework?

A. To build web applications using the Model-View-Controller pattern

B. To build desktop applications with rich user interfaces

C. To manage database connections in applications

D. To provide data visualization tools

Correct Answer is : ASP.NET MVC is used to build web applications following the Model-View-Controller architectural pattern.

69. What is the purpose of the System.Threading namespace in .NET Framework?

A. To provide classes for multithreaded programming

B. To provide classes for network communication

C. To provide classes for cryptography

D. To provide classes for data serialization

Correct Answer is : The System.Threading namespace in .NET Framework contains classes for multithreaded programming and synchronization.

70. What is the purpose of the System.Net namespace in .NET Framework?

A. To provide classes for network communication

B. To provide classes for user interface design

C. To provide classes for database connectivity

D. To provide classes for encryption and decryption

Correct Answer is : The System.Net namespace in .NET Framework contains classes for network communication like HTTP requests and responses.

71. What is the purpose of the System.Xml namespace in .NET Framework?

A. To provide classes for working with XML data

B. To provide classes for database queries

C. To provide classes for user authentication

D. To provide classes for cryptography

Correct Answer is : The System.Xml namespace in .NET Framework contains classes for working with XML data like parsing and creating XML documents.

72. Which of the following is NOT a valid method of inter-process communication in .NET Framework?

A. Remoting

B. WCF (Windows Communication Foundation)

C. Memory-mapped files

D. DLL import

Correct Answer is : DLL import is used to call functions from unmanaged DLLs, not for inter-process communication.

73. Which of the following is NOT a core component of the .NET Framework?

A. Common Language Runtime (CLR)

B. Base Class Library (BCL)

C. ASP.NET Web Forms

D. Windows Presentation Foundation (WPF)

Correct Answer is : ASP.NET Web Forms is a part of the ASP.NET framework, not a core component of the .NET Framework itself.

74. Which of the following is NOT a valid type of memory in the .NET Framework?

A. Stack

B. Heap

C. Static

D. Virtual

Correct Answer is : Virtual memory is a concept at the operating system level, not specific to the .NET Framework's memory management.

75. What is the purpose of the MSIL (Microsoft Intermediate Language) in .NET Framework?

A. To provide platform independence by being converted to native code at runtime

B. To improve debugging capabilities for developers

C. To optimize code execution for better performance

D. To handle memory management and garbage collection

Correct Answer is : MSIL allows for platform independence by being converted to native code at runtime.

76. Which of the following is not a valid type of memory in .NET Framework?

A. Stack memory

B. Heap memory

C. Global memory

D. Thread-local storage

Correct Answer is : Global memory is not a valid type of memory in .NET Framework.

77. What is the role of the JIT (Just-In-Time) compiler in .NET Framework?

A. To convert MSIL code into native machine code at runtime

B. To optimize database queries for improved performance

C. To handle user interface rendering in web applications

D. To manage asynchronous tasks in multithreaded applications

Correct Answer is : JIT compiler converts MSIL code into native machine code at runtime for execution.

78. Which of the following is not a valid access modifier in .NET Framework?

A. Public

B. Protected

C. Internal

D. Private-Friend

Correct Answer is : Private-Friend is not a valid access modifier in .NET Framework.

79. What is the purpose of the Globalization and Localization features in .NET Framework?

A. To support multiple languages and cultures in an application

B. To improve network security for data transmission

C. To optimize code for faster execution

D. To manage user authentication and authorization

Correct Answer is : Globalization and Localization features support multiple languages and cultures in an application.

80. In .NET Framework, what is the purpose of the ConfigurationManager class?

A. To read and write configuration settings for an application

B. To manage database connections and transactions

C. To handle user input validation

D. To generate dynamic HTML content for web pages

Correct Answer is : ConfigurationManager class is used to read and write configuration settings for an application.

81. What is the role of the AppDomain in .NET Framework?

A. To provide isolation and security boundaries for executing managed code

B. To handle user interface events in Windows Forms applications

C. To manage memory allocation and deallocation

D. To optimize network communication for web services

Correct Answer is : AppDomain provides isolation and security boundaries for executing managed code.

82. What is the function of the Global Assembly Cache (GAC) in .NET Framework?

A. It stores shared assemblies for use by multiple applications.

B. It is a cache for storing temporary data during runtime.

C. It is used for caching HTTP responses in web applications.

D. It is a storage location for database connection strings.

Correct Answer is : The GAC stores shared assemblies that can be accessed by multiple applications.

83. What is the purpose of the .NET Framework Common Language Runtime (CLR)?

A. It compiles C# code into machine code for execution.

B. It provides a runtime environment for executing managed code.

C. It is a code editor for writing .NET applications.

D. It is a database management system for .NET applications.

Correct Answer is : The CLR provides a runtime environment for executing managed code in .NET applications.

84. What is the purpose of the ASP.NET framework in relation to the .NET Framework?

A. It is used for building desktop applications.

B. It is a web development framework for building web applications.

C. It is a testing framework for .NET applications.

D. It is a framework for data visualization in .NET applications.

Correct Answer is : ASP.NET is a web development framework for building web applications using the .NET Framework.

85. What is the purpose of the .NET Core framework in relation to the .NET Framework?

A. It is an older version of the .NET Framework.

B. It is a cross-platform, open-source version of the .NET Framework.

C. It is a specialized framework for game development in .NET.

D. It is a framework for building mobile applications in .NET.

Correct Answer is : .NET Core is a cross-platform, open-source version of the .NET Framework.

86. What is the purpose of the Windows Communication Foundation (WCF) in .NET Framework?

A. It is a framework for building desktop applications in .NET.

B. It is a framework for building web services and service-oriented applications.

C. It is a framework for real-time communication in .NET applications.

D. It is a framework for data visualization in .NET applications.

Correct Answer is : WCF is a framework for building web services and service-oriented applications in .NET.

87. What is the role of the Common Type System (CTS) in the .NET Framework?

A. It defines how types are declared, used, and managed in the runtime.

B. It is a tool for debugging .NET applications.

C. It is a framework for creating user interfaces in .NET applications.

D. It is a framework for handling exceptions in .NET applications.

Correct Answer is : The CTS defines how types are declared, used, and managed in the runtime of the .NET Framework.

88. What is the purpose of the Intermediate Language (IL) in .NET Framework?

A. It is the final executable code that runs on the .NET Framework.

B. It is the source code written in a high-level language like C# or VB.NET.

C. It is the code generated by the JIT compiler from the compiled source code.

D. It is the byte code that is platform-independent and can be converted to native code.

Correct Answer is : IL is the byte code that is platform-independent and can be converted to native code by the JIT compiler.

89. What is the purpose of the Windows Presentation Foundation (WPF) in .NET Framework?

A. It is a framework for building web applications in .NET.

B. It is a framework for creating desktop applications with rich user interfaces.

C. It is a testing framework for UI testing in .NET applications.

D. It is a security framework for securing .NET applications.

Correct Answer is : WPF is a framework for creating desktop applications with rich user interfaces in the .NET Framework.

.NET Framework interview questions