Why caching reduces server load in Rest API - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to return cached data if available.

Rest API

if cache.get('data') is not [1]:
    return cache.get('data')

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

AFalse

BNone

CTrue

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using True or False instead of None to check cache presence.

We check if the cached data is not None to use it and avoid extra server processing.

2fill in blank

medium

Complete the code to store response in cache after fetching.

Rest API

response = fetch_data()
cache.[1]('data', response)

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

Aset

Bdelete

Cget

Dupdate

Attempts:

3 left

💡 Hint

Common Mistakes

Using get instead of set to store data.

We use set to save the response in cache for future requests.

3fill in blank

hard

Fix the error in the code to check cache before fetching data.

Rest API

if cache.[1]('data'):
    return cache.get('data')
else:
    data = fetch_data()
    cache.set('data', data)
    return data

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

Aget

Bcontains

Cexists

Dhas_key

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent methods like has_key or contains.

Use get to check if 'data' exists in cache; it returns None if not found.

4fill in blank

hard

Fill both blanks to create a cache dictionary comprehension filtering keys.

Rest API

filtered_cache = {k: v for k, v in cache.items() if k [1] 'user' and v [2] None}

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

Astartswith

Bendswith

Cis not

Dis

Attempts:

3 left

💡 Hint

Common Mistakes

Using endswith instead of startswith.

Using 'is' instead of 'is not' for None check.

We filter keys starting with 'user' and values that are not None.

5fill in blank

hard

Fill all three blanks to create a cache update with conditional filtering.

Rest API

cache_update = [1]: [2] for [3], val in new_data.items() if val > 0

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

Akey

Bval

Ck

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing variable names or using undefined names.

We create a dictionary with keys k and values val from new_data filtering positive values.