Exception handling flow in C++ - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of try block in exception handling?

The try block contains code that might throw an exception. It is where you test code that could cause errors.

beginner

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

When an exception is thrown, the program stops executing the try block and looks for a matching catch block to handle the error.

beginner

What is the role of a catch block?

A catch block handles exceptions thrown in the try block. It defines how to respond to specific types of errors.

beginner

What does the throw keyword do?

The throw keyword signals that an error or exception has occurred. It sends an exception object to be caught by a catch block.

intermediate

What is the flow of control when an exception is not caught?

If no matching catch block is found, the program calls std::terminate() and usually ends abruptly.

What keyword starts a block of code that might throw an exception?

A try

B catch

C throw

D finally

The try block contains code that might throw exceptions.

Which block handles the exception after it is thrown?

A try

B throw

C if

D catch

The catch block handles exceptions thrown in the try block.

What happens if an exception is thrown but no catch block matches it?

A Program continues normally

B Program calls std::terminate() and ends

C Exception is ignored

D Exception is automatically handled

If no matching catch block is found, the program calls std::terminate() and usually ends.

Which keyword is used to signal an error in C++ exception handling?

A catch

B error

C throw

D try

The throw keyword signals that an exception has occurred.

Can multiple catch blocks follow a single try block?

A Yes, to handle different exception types

B No, only one catch block is allowed

C Only if they catch the same exception type

D Only if they are nested

Multiple catch blocks can follow a try block to handle different exception types.

Explain the flow of control in C++ exception handling from try to catch.

Think about what happens when an error occurs inside the try block.

What happens if an exception is thrown but no catch block matches it? Describe the program behavior.

Consider what the system does when it cannot handle an error.