C# Exception Handling Questions with Answers | Programming Q&A | Page 2

C# Exception Handling is a crucial topic in programming interviews and technical assessments. This section provides comprehensive programming questions and answers related to handling runtime errors in C#. Understanding exception handling helps developers write reliable code that gracefully manages unexpected events using constructs like try, catch, finally, and throw. These C# programming MCQs and interview-based examples are often seen in company placement tests such as TCS, Infosys, Wipro, and Capgemini. Practicing these C# exception handling questions with answers will strengthen your understanding of error handling and help you prepare for real-world coding challenges as well as competitive programming rounds.

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Q11

What is the purpose of exception handling in C#?

A To prevent compilation errors
B To handle runtime errors
C To improve code readability
D To increase application speed

Answer: Option B

Explanation: Exception handling manages runtime errors to maintain normal application flow.

Q12

Which keyword is used to handle exceptions in C#?

A handle
B catch
C try
D exception

Answer: Option C

Explanation: try-catch blocks are used for exception handling.

Q13

What does the finally block do in exception handling?

A Executes only when no exception occurs
B Executes only when exception occurs
C Always executes
D Never executes

Answer: Option C

Explanation: Finally block always executes regardless of exception occurrence.

Q14

Which exception is thrown when dividing by zero?

A ArithmeticException
B DivideByZeroException
C MathException
D CalculationException

Answer: Option B

Explanation: DivideByZeroException occurs on division by zero operations.

Q15

What is the base class for all exceptions in C#?

A System.Exception
B System.SystemException
C System.ApplicationException
D System.BaseException

Answer: Option A

Explanation: System.Exception is the root class for all exceptions.

Q16

Which keyword is used to throw an exception explicitly?

A throws
B exception
C raise
D throw

Answer: Option D

Explanation: throw keyword manually raises exceptions.

Q17

What happens if an exception is not caught?

A Exception is ignored
B Application continues normally
C Application terminates
D Exception is logged automatically

Answer: Option C

Explanation: Uncaught exceptions terminate the application.

Q18

Which block is used to clean up resources in exception handling?

A try
B catch
C finally
D using

Answer: Option C

Explanation: Finally block ensures resource cleanup.

Q19

What is the purpose of multiple catch blocks?

A To improve performance
B To handle different exception types
C To make code more complex
D To reduce code size

Answer: Option B

Explanation: Multiple catch blocks handle different exception types specifically.

Q20

Which exception is thrown when accessing a null object?

A NullException
B NullReferenceException
C ObjectNotFoundException
D NullObjectException

Answer: Option B

Explanation: NullReferenceException occurs on null object access.

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