Why rate limiting protects services in Rest API - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a rate limit of 100 requests per minute.

Rest API

rate_limit = [1]  # requests per minute

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

A100

B1000

C10

D10000

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a very high number that doesn't protect the service.

Setting the rate limit to 100 requests per minute helps protect the service from too many requests.

2fill in blank

medium

Complete the code to check if the user has exceeded the rate limit.

Rest API

if requests_made > [1]:
    return '429 Too Many Requests'

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

A200

B500

C100

D50

Attempts:

3 left

💡 Hint

Common Mistakes

Using a lower or higher number than the set limit.

The code checks if the user made more than 100 requests, which is the limit set.

3fill in blank

hard

Fix the error in the code to correctly reset the request count after one minute.

Rest API

if time_since_last_reset > [1]:
    requests_made = 0

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

A30

B60

C120

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using 30 or 120 seconds which do not match the rate limit period.

The request count should reset after 60 seconds (1 minute) to enforce the rate limit per minute.

4fill in blank

hard

Fill both blanks to create a dictionary that tracks requests per user.

Rest API

user_requests = [1]  # dictionary to store counts
user_requests[user_id] = user_requests.get([2], 0) + 1

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

A{}

Buser_id

C[]

Drequests

Attempts:

3 left

💡 Hint

Common Mistakes

Using [] which creates a list, not a dictionary.

The dictionary is initialized with {} and the user_id is used as the key to track requests.

5fill in blank

hard

Fill all three blanks to implement a simple rate limiter function.

Rest API

def rate_limiter(user_id):
    if user_id not in [1]:
        [1][user_id] = 0
    [1][user_id] += 1
    if [1][user_id] > [2]:
        return '[3]'
    return 'OK'

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

Auser_requests

B100

C429 Too Many Requests

Drequests_count

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names or incorrect status messages.

The function uses the user_requests dictionary to count requests, limits to 100, and returns '429 Too Many Requests' if exceeded.