Why exceptions occur in Python - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to catch a division by zero error.

Python

try:
    result = 10 [1] 0
except ZeroDivisionError:
    print("Cannot divide by zero")

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

A-

B+

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or multiplication instead of division.

The division operator / causes a ZeroDivisionError when dividing by zero.

2fill in blank

medium

Complete the code to convert a string to an integer safely.

Python

try:
    number = int([1])
except ValueError:
    print("Invalid number")

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

A"abc"

B123

CNone

D3.14

Attempts:

3 left

💡 Hint

Common Mistakes

Using a valid number string which does not cause an exception.

Trying to convert a non-numeric string like "abc" to int raises a ValueError.

3fill in blank

hard

Fix the error in the code that causes a KeyError.

Python

data = {'name': 'Alice'}
print(data[[1]])

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A'name'

B'phone'

C'address'

D'age'

Attempts:

3 left

💡 Hint

Common Mistakes

Using keys that are not in the dictionary causing KeyError.

The key 'name' exists in the dictionary, so accessing it does not cause a KeyError.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that includes only words longer than 3 letters.

Python

words = ['cat', 'lion', 'dog', 'elephant']
lengths = {word: [1] for word in words if len(word) [2] 3}

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Alen(word)

B>

C<

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong comparison operator or value.

The comprehension maps each word to its length only if the word length is greater than 3.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that includes uppercase keys for words with length greater than 4.

Python

words = ['apple', 'bat', 'carrot', 'dog']
result = { [1]: [2] for word in words if len(word) [3] 4 }

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

Aword.upper()

Bword

C>

Dlen(word)

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up keys and values or using wrong comparison operators.

The comprehension creates keys as uppercase words and values as the original words for those longer than 4 letters.