Why built-in functions are useful in Python - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to use a built-in function that finds the length of a list.

Python

numbers = [1, 2, 3, 4, 5]
length = [1](numbers)
print(length)

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

Alen

Bcount

Csize

Dlength

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'size' or 'length' which are not built-in functions in Python.

Trying to use 'count' which counts occurrences of a value, not list length.

The len() function returns the number of items in a list.

2fill in blank

medium

Complete the code to convert a string to uppercase using a built-in function.

Python

word = "hello"
upper_word = word.[1]()
print(upper_word)

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

Atitle

Bcapitalize

Clower

Dupper

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'lower' which makes letters small.

Using 'capitalize' which only changes the first letter.

The upper() method converts all letters in a string to uppercase.

3fill in blank

hard

Fix the error by completing the code to find the maximum number in a list using a built-in function.

Python

values = [10, 20, 30, 40]
max_value = [1](values)
print(max_value)

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

Amaxnum

Bmax

Cmax_value

Dmaximum

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'maximum' which is not a built-in function.

Trying to use variable names as functions.

The built-in function max() returns the largest item in a list.

4fill in blank

hard

Fill both blanks to create a dictionary with word lengths only for words longer than 3 letters.

Python

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

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

Alen(word)

B>

C<

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' which selects shorter words.

Putting 'word' instead of 'len(word)' for the dictionary values.

Use len(word) to get the length and > to filter words longer than 3 letters.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase words as keys and their lengths as values for words longer than 4 letters.

Python

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

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

Aw.upper()

Blen(w)

C>

Dw.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w.lower()' instead of uppercase for keys.

Using '<' instead of '>' for filtering.

Putting 'w' instead of 'len(w)' for values.

Use w.upper() for keys, len(w) for values, and > to filter words longer than 4 letters.