The correct answer is Framework

.NET interview questions | Snaprecruit.com

Q: Select the data type which is NOT supported by range validator.

The correct answer is Character

Q: .Net remote server object must implement

The correct answer is ISerializable

Q: Which class does the remote object has to inherit?

The correct answer is System.MarshalByRefObject

Q: What is the purpose of the Global Assembly Cache (GAC) in .NET?

The correct answer is The GAC is used to store assemblies that are shared by multiple applications to avoid duplication.

Q: What is the purpose of the AppDomain in .NET?

The correct answer is AppDomain isolates applications for improved security and reliability by preventing conflicts between different applications.

Q: Which of the following is true about Value Types and Reference Types in .NET?

The correct answer is Value Types are stored on the stack, while Reference Types are stored on the heap in .NET.

Q: What is the purpose of the IDisposable interface in .NET?

The correct answer is IDisposable interface is used to release unmanaged resources in .NET to prevent memory leaks.

Q: Which of the following is true about the Garbage Collector in .NET?

The correct answer is The Garbage Collector in .NET automatically manages memory by reclaiming unused objects to prevent memory leaks.

Q: What is the purpose of the JIT compiler in .NET?

The correct answer is The JIT compiler in .NET converts Intermediate Language (IL) code into native machine code for execution.

1. Select protocol is used to call a web service

A. Stp

B. Ftp

C. Smtp

D. Http

Correct Answer is : Http

2. What is MVC?

A. Framework

B. Software

C. WebApplication

D. Browser

Correct Answer is : Framework

3. Select the data type which is NOT supported by range validator.

A. Integer

B. Double

C. Character

D. Date

Correct Answer is : Character

4. .Net remote server object must implement

A. ISingleCall

B. ISerializable

C. IUnknown

D. IMarshalByValue

Correct Answer is : ISerializable

5. Which class does the remote object has to inherit?

A. System.MarshalByRefObject

B. System.Web.UI.WebControls

C. System.Globalization

D. System.Web.Security

Correct Answer is : System.MarshalByRefObject

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

A. To store assemblies that are shared by multiple applications

B. To cache user-specific data for faster access

C. To optimize code execution speed

D. To store temporary files during compilation

Correct Answer is : The GAC is used to store assemblies that are shared by multiple applications to avoid duplication.

7. What is the purpose of the AppDomain in .NET?

A. To isolate applications for improved security and reliability

B. To manage user interface components

C. To optimize database queries

D. To handle network communications

Correct Answer is : AppDomain isolates applications for improved security and reliability by preventing conflicts between different applications.

8. Which of the following is true about Value Types and Reference Types in .NET?

A. Value Types are stored on the stack, while Reference Types are stored on the heap

B. Value Types are stored on the heap, while Reference Types are stored on the stack

C. Value Types and Reference Types are always stored in separate memory locations

D. Value Types and Reference Types are stored in the same memory location

Correct Answer is : Value Types are stored on the stack, while Reference Types are stored on the heap in .NET.

9. What is the purpose of the IDisposable interface in .NET?

A. To release unmanaged resources

B. To handle user input events

C. To optimize memory usage

D. To manage database connections

Correct Answer is : IDisposable interface is used to release unmanaged resources in .NET to prevent memory leaks.

10. Which of the following is true about the Garbage Collector in .NET?

A. It automatically manages memory by reclaiming unused objects

B. It requires manual intervention to release memory

C. It only works for Value Types

D. It can cause memory leaks if not used properly

Correct Answer is : The Garbage Collector in .NET automatically manages memory by reclaiming unused objects to prevent memory leaks.

11. What is the purpose of the JIT compiler in .NET?

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

B. To optimize database queries

C. To manage user interface components

D. To handle network communications

Correct Answer is : The JIT compiler in .NET converts Intermediate Language (IL) code into native machine code for execution.

12. What is the difference between boxing and unboxing in .NET?

A. Boxing is the process of converting a value type to a reference type, while unboxing is the opposite

B. Boxing is the process of converting a reference type to a value type, while unboxing is the opposite

C. Boxing and unboxing are the same process in .NET

D. Boxing and unboxing are not supported in .NET

Correct Answer is : Boxing is converting a value type to a reference type, while unboxing is the reverse process in .NET.

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

A. To ensure that IDisposable objects are properly disposed

B. To handle exceptions in asynchronous code

C. To define namespaces in the code

D. To declare new variables within a specific scope

Correct Answer is : The using statement ensures that IDisposable objects are properly disposed after use in C# to prevent memory leaks.

14. Which of the following is true about Generics in .NET?

A. Generics allow for type-safe operations without specifying the data type

B. Generics can only be used with reference types

C. Generics are limited to a predefined set of data types

D. Generics are not supported in .NET

Correct Answer is : Generics in .NET allow for type-safe operations without specifying the data type, improving code reusability and performance.

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

A. To read configuration settings from the application configuration file

B. To manage user authentication

C. To handle network communications

D. To optimize database queries

Correct Answer is : The ConfigurationManager class is used to read configuration settings from the application configuration file in .NET.

16. Which of the following is NOT a valid access modifier in C#?

A. Public

B. Internal

C. Protected

D. Private Internal

Correct Answer is : Private Internal is not a valid access modifier in C#.

17. What is the purpose of the 'using' keyword in C#?

A. To include a namespace in the current scope

B. To define a new class

C. To iterate over a collection

D. To create a new instance of a class

Correct Answer is : The 'using' keyword is used to include a namespace in the current scope.

18. What is the difference between 'ref' and 'out' parameters in C#?

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

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

C. 'ref' parameters are passed by reference, while 'out' parameters are passed by value.

D. 'out' parameters are passed by reference, while 'ref' parameters are passed by value.

Correct Answer is : 'ref' parameters must be initialized before passing to a method, while 'out' parameters do not.

19. Which of the following is true about delegates in C#?

A. Delegates can point to both static and instance methods

B. Delegates can only point to static methods

C. Delegates can only point to instance methods

D. Delegates cannot be used in multi-threaded applications

Correct Answer is : Delegates can point to both static and instance methods in C#.

20. What is the purpose of the 'volatile' keyword in C#?

A. To indicate that a field might be modified by multiple threads that are executing at the same time

B. To define a constant value that cannot be changed

C. To declare a variable that cannot be accessed by multiple threads

D. To specify an optional parameter in a method signature

Correct Answer is : The 'volatile' keyword in C# is used to indicate that a field might be modified by multiple threads that are executing at the same time.

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

A. To define asynchronous methods and await their completion

B. To handle exceptions in asynchronous code

C. To define synchronous methods and await their completion

D. To create parallel threads for better performance

Correct Answer is : The 'async' and 'await' keywords in C# are used to define asynchronous methods and await their completion.

22. What is the purpose of the 'using' statement in C# when dealing with IDisposable objects?

A. To ensure that the object is disposed of properly after use

B. To prevent memory leaks in the application

C. To automatically free up system resources

D. To handle exceptions when disposing of objects

Correct Answer is : The 'using' statement in C# ensures that the object is disposed of properly after use.

23. What is the purpose of the 'yield' keyword in C#?

A. To return an iterator that uses lazy evaluation

B. To define a list of objects

C. To create a new thread for parallel execution

D. To handle exceptions in asynchronous code

Correct Answer is : The 'yield' keyword in C# is used to return an iterator that uses lazy evaluation.

24. In .NET, what is the purpose of the 'using' statement in C#?

A. To ensure that IDisposable objects are properly disposed of

B. To include external libraries in the project

C. To declare namespace aliases

D. To define custom attributes

Correct Answer is : The 'using' statement is used to ensure that IDisposable objects are properly disposed of after use.

25. What is a delegate in .NET?

A. A type that represents references to methods with a specific parameter list and return type

B. A type that represents static methods only

C. A type that represents value types in C#

D. A type that represents a collection of objects

Correct Answer is : A delegate in .NET represents references to methods with a specific parameter list and return type.

26. What is the difference between an abstract class and an interface in .NET?

A. An abstract class can have implementation details, while an interface cannot

B. An interface can have constructors, while an abstract class cannot

C. An abstract class can be inherited multiple times, while an interface cannot

D. An interface can have access modifiers, while an abstract class cannot

Correct Answer is : An abstract class can have implementation details, while an interface cannot in .NET.

27. What is the role of the Common Language Runtime (CLR) in the .NET framework?

A. To provide a runtime environment for executing .NET applications

B. To compile C# code to machine code

C. To manage memory allocation for objects

D. To handle network communication

Correct Answer is : The Common Language Runtime (CLR) provides a runtime environment for executing .NET applications.

28. What is the purpose of the AppDomain class in .NET?

A. To provide a sandbox for executing untrusted code

B. To handle user input validation

C. To manage user authentication

D. To define application-specific settings

Correct Answer is : The AppDomain class in .NET is used to provide a sandbox for executing untrusted code.

29. What is the purpose of the 'using' keyword in C# and how does it relate to memory management?

A. Automatically disposes of resources, freeing up memory

B. Allocates additional memory for the program

C. Creates a new instance of an object

D. Updates the reference count of an object

Correct Answer is : The 'using' keyword ensures that resources are properly disposed of after use, preventing memory leaks.

30. What is the purpose of the 'Task' class in .NET?

A. Represents a single operation that does not return a value

B. Represents a collection of methods

C. Defines a new data structure

D. Allocates memory for the program

Correct Answer is : The 'Task' class in .NET represents a single operation that does not return a value, used for asynchronous programming.

.NET interview questions