Sliding window algorithm in Rest API - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize the sliding window size.

Rest API

window_size = [1]

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

A0

B5

C10

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Using zero or negative numbers for window size causes errors.

The sliding window size is set to 10 to process chunks of 10 elements.

2fill in blank

medium

Complete the code to slide the window by one position.

Rest API

start = start [1] 1

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

A/

B+

C*

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction instead of addition moves the window backward.

Sliding the window means moving the start index forward by 1, so we add 1.

3fill in blank

hard

Fix the error in the code to correctly calculate the window sum.

Rest API

window_sum = window_sum [1] nums[end] - nums[start - 1]

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

A+

B-

C/

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' in the blank causes incorrect calculation.

To update the sum when sliding the window, add the new element and subtract the old one. The code adds the new element and subtracts the old one outside the blank, so the blank must be '+'.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps each word to its length if length is greater than 3.

Rest API

{word: [1] for word in words if [2]

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

Alen(word)

Bword

Clen(word) > 3

Dword > 3

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself instead of its length.

Comparing the word string to a number.

The dictionary comprehension maps each word to its length using len(word). The condition filters words with length greater than 3 using len(word) > 3.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps uppercase keys to values only if values are positive.

Rest API

result = {{ [1]: [2] for k, v in data.items() if v [3] 0 }}

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

Ak.upper()

Bv

C>

Dk.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using k.lower() instead of k.upper().

Using incorrect comparison operators.

The keys are converted to uppercase with k.upper(), values are v, and the condition filters values greater than 0 using >.