Why exceptions occur in Python - Quick Recap

Recall & Review

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What is an exception in Python?

An exception is an error that happens during the running of a program, which stops the normal flow of the program.

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Name a common reason why exceptions occur.

Exceptions often occur because the program tries to do something invalid, like dividing by zero or accessing a missing file.

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What happens if an exception is not handled?

If an exception is not handled, the program will stop running and show an error message.

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Why might a 'FileNotFoundError' exception occur?

This exception happens when the program tries to open a file that does not exist or the path is wrong.

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How does Python signal that an exception has occurred?

Python raises an exception object that interrupts the normal flow and looks for code to handle it.

What causes a ZeroDivisionError in Python?

A Using a variable before defining it

B Dividing a number by zero

C Trying to open a missing file

D Writing invalid syntax

Dividing by zero is not allowed and causes a ZeroDivisionError.

What happens if you do not handle an exception?

A The program stops and shows an error

B The program continues normally

C The program ignores the error silently

D The program restarts automatically

Uncaught exceptions stop the program and display an error message.

Which of these is NOT a reason for exceptions?

A Correctly writing a print statement

B Dividing by zero

C Using a variable that is not defined

D Trying to access a missing file

Correct code like a print statement does not cause exceptions.

What does Python do when an exception occurs?

A Ignores it

B Automatically fixes the error

C Raises an exception object

D Restarts the program

Python raises an exception object to signal the error.

Why might a FileNotFoundError happen?

A File has wrong permissions

B File is too large

C File is open in another program

D File path is incorrect or file is missing

Trying to open a file that does not exist causes FileNotFoundError.

Explain in your own words why exceptions occur in Python programs.

Think about what happens when the program tries to do something it cannot.

List some common examples of exceptions and why they happen.

Recall errors like dividing by zero or missing files.