Interview Questions

1. An Exception of type________ is thrown if a value of object type cannot be assigned to a variable on the LHS.

Options:

a. ArgumentNullException

b. OverflowException

c. InvalidCastException

d. VerificationException

Reveal Answer

2. Which of these handles an Exception that is not caught in user program (Even in the main function)?

Options:

a. .CLR

b. .Frame Work

c. .Both

d. None

Reveal Answer

3. Do multiple catch blocks execute simultaneously?

Options:

a. Yes

b. No

Reveal Answer

4. In .NET the base class for every exception is:

Options:

a. System.Type

b. System.Exception

c. System.ExcpetionHandling

d. ApplicationException

Reveal Answer

5. Exception is ________ because it can encapsulate the data required for properly handling exception in catch block

Options:

a. Class

b. Field member

c. Variable

d. Object

Reveal Answer

6. For a given try, the catch block of class must be always after the catch block of _ class

Options:

a. Parent, child

b. Child, parent

c. Child, child

d. Parent, parent

Reveal Answer

7. Can a variable declared in try block accessed in catch block?

Options:

a. Yes

b. No

c. can’t say

Reveal Answer

8. Every user-defined exception class inherits from _________

Options:

a. System.Exception

b. System.Userdefined

c. System.Object

d. System.Type

Reveal Answer

9. Can we use goto and return in finally block?

Options:

a. Yes

b. No

c. Can’t say

Reveal Answer

10. What is an Exception?

Options:

a. It is an event

b. Disrupts the normal execution of program

c. It is the base class for all exceptions in System namespace

d. All the above

Reveal Answer

11. _________ has the details about where the error has occurred?

Options:

a. StackTrace

b. Trace

c. CheckTrace

d. TrackError

Reveal Answer

12. What are the types of Exceptions available in C#?

Options:

a. SystemException and ApplicationException

b. SystemException only

c. ApplicationException only

d. None of the above

Reveal Answer

13. What is the performance of an application when Exceptions are thrown and handled?

Options:

a. Performance increases

b. Performance decreases

c. Performance remains the same

Reveal Answer

14. Will generalized catch block of exception run even after it finds a matching catch prior to it?

Options:

a. Yes

b. No

Reveal Answer

15. What is an InnerException?

Options:

a. It is a property that fetches the exception instance that caused the current exception

b. It is a property that gets a general exception instance

c. It is a property that gives information of any exception instance

d. None of the above

Reveal Answer

16. What is the right way to handle an Exception?

Options:

a. Using try, catch and/or finally block

b. try and finally block

c. Page_error and Application_error

d. None of the above

Reveal Answer

17. What will be the output of the following program? static void Main(string[] args) { int a=3, b=0; try { Console.WriteLine("Output: " + (a / b).ToString()); } catch (ArithmeticException ex) { Console.WriteLine("Caught!"); } catch (Exception ex) { Console.WriteLine("General error"); } }

Options:

a. Prints: Output: NaN

b. Prints: Caught

c. Prints: General error

d. Will show an empty screen

Reveal Answer

18. The following exception is raised by ADO.NET components:

Options:

a. DataException

b. FileNotFoundException

c. DBConcurrencyException

d. OutOfMemoryException

Reveal Answer

19. The following exception is thrown when the number of rows affected during Insert/Update/Delete operation results in zero:

Options:

a. DataException

b. FileNotFoundException

c. DBConcurrencyException

d. OutOfMemoryException

Reveal Answer

20. The following is responsible for exceptions thrown while accessing information from streams.

Options:

a. IOException

b. DBConcurrencyException

c. OutOfMemoryException

d. NotImplementedException

Reveal Answer

21. When is NotImplementedException thrown?

Options:

a. When a functionality is not implemented

b. When a file is not found

c. None of the above

Reveal Answer

22. Is it possible to create User Defined Exceptions?

Options:

a. Yes

b. No

Reveal Answer

23. Which of the following is true? i. There can be multiple catch blocks for a try block ii. There must be 1 finally block for a try block iii. A try block without catch block can exist iv. It is alright to leave catch block without any code inside it

Options:

a. i, ii

b. i, iii, iv

c. i, iv

d. All the above

Reveal Answer

24. When accessing an element of an array using an index that is greater than length of the array throws the following exception

Options:

a. ArgumentNullException

b. OverflowException

c. IndexOutOfRangeException

d. StackOverflowException

Reveal Answer

Interview Questions and Answer

1. An Exception of type________ is thrown if a value of object type cannot be assigned to a variable on the LHS.

2. Which of these handles an Exception that is not caught in user program (Even in the main function)?

3. Do multiple catch blocks execute simultaneously?

4. In .NET the base class for every exception is:

5. Exception is ________ because it can encapsulate the data required for properly handling exception in catch block

6. For a given try, the catch block of class must be always after the catch block of _ class

7. Can a variable declared in try block accessed in catch block?

8. Every user-defined exception class inherits from _________

9. Can we use goto and return in finally block?

10. What is an Exception?

11. _________ has the details about where the error has occurred?

12. What are the types of Exceptions available in C#?

13. What is the performance of an application when Exceptions are thrown and handled?

14. Will generalized catch block of exception run even after it finds a matching catch prior to it?

15. What is an InnerException?

16. What is the right way to handle an Exception?

17. What will be the output of the following program? static void Main(string[] args) { int a=3, b=0; try { Console.WriteLine("Output: " + (a / b).ToString()); } catch (ArithmeticException ex) { Console.WriteLine("Caught!"); } catch (Exception ex) { Console.WriteLine("General error"); } }

18. The following exception is raised by ADO.NET components:

19. The following exception is thrown when the number of rows affected during Insert/Update/Delete operation results in zero:

20. The following is responsible for exceptions thrown while accessing information from streams.

21. When is NotImplementedException thrown?

22. Is it possible to create User Defined Exceptions?

23. Which of the following is true? i. There can be multiple catch blocks for a try block ii. There must be 1 finally block for a try block iii. A try block without catch block can exist iv. It is alright to leave catch block without any code inside it

24. When accessing an element of an array using an index that is greater than length of the array throws the following exception

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