Understanding Python Exception Handling

What is an exception in Python?

• An exception in Python is a function that handles errors.

• An exception in Python is a type of variable.

• An exception in Python is a feature that enhances performance.

• An exception in Python is an error that occurs during the execution of a program.

Name two built-in exceptions in Python.

• KeyError

• ValueError, IndexError

• TypeError

• AttributeError

What keyword is used to handle exceptions in Python?

• catch

• throw

• except

• finally

What is the purpose of the 'finally' block in exception handling?

• The 'finally' block ensures code execution after try/catch, regardless of exceptions.

• The 'finally' block is used to catch exceptions before they propagate.

• The 'finally' block only executes if an exception is thrown.

• The 'finally' block is optional and can be omitted without consequences.

Explain the difference between 'try' and 'except' blocks.

• 'try' is used for defining classes, while 'except' is for importing modules.

• 'try' is for catching errors, while 'except' is for executing code.

• 'try' is for attempting code execution, while 'except' is for handling exceptions that arise during that execution.

• 'try' is used to define functions, while 'except' is for declaring variables.

What does the 'raise' keyword do in Python?

• The 'raise' keyword is used to trigger an exception in Python.

• The 'raise' keyword is used to import modules in Python.

• The 'raise' keyword is used to create a variable in Python.

• The 'raise' keyword is used to define a function in Python.

What is the output of the following code: 'try: 1/0 except ZeroDivisionError: print("Error")'?

• None

• 1

• Exception

• Error

What is the purpose of the 'else' block in exception handling?

• The 'else' block runs code regardless of exceptions in the 'try' block.

• The 'else' block is used to catch exceptions that occur in the 'try' block.

• The 'else' block is mandatory for all exception handling structures.

• The 'else' block executes code when no exceptions occur in the 'try' block.

How do you create a custom exception in Python?

• class MyCustomError(Exception): def __init__(self, message): super().__init__(message)

• class MyCustomError(Exception):

• raise Exception('An error occurred')

• def create_exception():

Explain how to use 'assert' for error handling in Python.

• Use 'assert' to log errors without raising exceptions.

• Assertions can be disabled globally to prevent error checking.

• Use 'assert condition' to check for errors; it raises AssertionError if the condition is false.

• 'assert' can be used to handle exceptions in try-except blocks.