Exception hierarchy in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to catch all exceptions using the base exception class.

Python

try:
    x = 1 / 0
except [1]:
    print("Caught an exception")

Drag options to blanks, or click blank then click option'

AZeroDivisionError

BException

CArithmeticError

DBaseException

Attempts:

3 left

💡 Hint

Common Mistakes

Using Exception instead of BaseException catches most but not all exceptions.

Using specific exceptions like ZeroDivisionError won't catch all exceptions.

The base class for all exceptions is BaseException. Catching it will catch all exceptions.

2fill in blank

medium

Complete the code to catch only errors related to arithmetic operations.

Python

try:
    y = 5 / 0
except [1]:
    print("Arithmetic error caught")

Drag options to blanks, or click blank then click option'

AArithmeticError

BBaseException

CZeroDivisionError

DException

Attempts:

3 left

💡 Hint

Common Mistakes

Using ZeroDivisionError only catches division by zero, not other arithmetic errors.

Using BaseException is too broad.

ArithmeticError is the base class for errors like division by zero and overflow errors.

3fill in blank

hard

Fix the error in the code to catch only division by zero exceptions.

Python

try:
    z = 10 / 0
except [1]:
    print("Division by zero caught")

Drag options to blanks, or click blank then click option'

AException

BArithmeticError

CZeroDivisionError

DBaseException

Attempts:

3 left

💡 Hint

Common Mistakes

Catching Exception or BaseException is too broad.

Using ArithmeticError catches more than just division by zero.

ZeroDivisionError is the specific exception raised when dividing by zero.

4fill in blank

hard

Fill both blanks to create a custom exception class inheriting from the correct base class.

Python

class MyError([1]):
    def __init__(self, message):
        super().__init__([2])

Drag options to blanks, or click blank then click option'

AException

BBaseException

CZeroDivisionError

Dmessage

Attempts:

3 left

💡 Hint

Common Mistakes

Inheriting from BaseException is not recommended for custom exceptions.

Passing the wrong argument to super().__init__ causes errors.

Custom exceptions usually inherit from Exception. The super().__init__ call passes the message to the base class.

5fill in blank

hard

Fill all three blanks to catch multiple exceptions in one except block.

Python

try:
    a = int('abc')
    b = 1 / 0
except ([1], [2], [3]):
    print("Caught a value or arithmetic error")

Drag options to blanks, or click blank then click option'

AValueError

BZeroDivisionError

CArithmeticError

DTypeError

Attempts:

3 left

💡 Hint

Common Mistakes

Missing one of the exceptions causes some errors to go uncaught.

Using unrelated exceptions like TypeError will not catch these errors.

The code catches ValueError from int conversion, ZeroDivisionError from division by zero, and ArithmeticError as a general arithmetic error.