Try-catch execution flow in C Sharp (C#) - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of a try-catch block in C#?

A try-catch block is used to handle errors (exceptions) that might happen during program execution, so the program can continue running safely instead of crashing.

beginner

What happens if an exception occurs inside the try block?

The program immediately stops running the try block and jumps to the catch block that matches the exception type to handle the error.

beginner

Can code after the try-catch block run if an exception is caught?

Yes, after the catch block finishes, the program continues running the code that comes after the try-catch block.

intermediate

What is the role of the finally block in try-catch-finally?

The finally block runs code that must execute no matter what, whether an exception happened or not, like closing files or releasing resources.

beginner

If no exception occurs in the try block, does the catch block run?

No, if the try block runs without errors, the catch block is skipped and the program continues normally.

What happens when an exception is thrown inside a try block?

A Execution jumps to the matching catch block.

B The program immediately stops running.

C The code after the try block runs first.

D The exception is ignored.

When an exception occurs, the program jumps to the catch block that matches the exception type to handle it.

Which block always runs regardless of exceptions?

A finally

B catch

C try

D none

The finally block always runs after try and catch, whether or not an exception occurred.

If no exception occurs, which blocks run?

A try and catch

B try and finally

C catch and finally

D try only

If no exception happens, the try block runs, then the finally block runs if present.

Can multiple catch blocks be used for one try block?

A Only if they are nested.

B No, only one catch block is allowed.

C Only if the exceptions are the same type.

D Yes, to handle different exception types.

Multiple catch blocks can be used to handle different types of exceptions separately.

What happens to code after the try-catch-finally block?

A It runs only if no exception occurred.

B It runs only if an exception was caught.

C It always runs after the try-catch-finally block finishes.

D It never runs if an exception occurs.

After the try-catch-finally block finishes, the program continues running the code that follows.

Explain the flow of execution in a try-catch-finally block when an exception occurs.

Think about what happens step-by-step when an error happens inside try.

Describe what happens if no exception occurs inside the try block.

Consider the normal flow without errors.