Why caching matters for performance in Django - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Django cache framework.

Django

from django.core.cache import [1]

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

Acache

Bsession

Cdb

Dsettings

Attempts:

3 left

💡 Hint

Common Mistakes

Importing session or settings instead of cache.

The cache object is imported from django.core.cache to use caching features.

2fill in blank

medium

Complete the code to set a value in the cache with a timeout of 300 seconds.

Django

cache.set('my_key', 'my_value', [1])

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A300

B60

C0

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 or negative values which mean no caching or immediate expiry.

The timeout value 300 means the cached data will expire after 5 minutes.

3fill in blank

hard

Fix the error in the code to retrieve a cached value safely.

Django

value = cache.[1]('my_key', default='default_value')

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Aretrieve

Bget

Cget_value

Dfetch

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent methods like fetch or get_value.

The correct method to get a cached value with a default is get.

4fill in blank

hard

Fill both blanks to create a cached view decorator with a 15-minute timeout.

Django

@[1]([2])
def my_view(request):
    pass

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Acache_page

B300

C900

Dtimeout

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong decorator names or wrong timeout values.

cache_page is the decorator to cache a view, and 900 seconds equals 15 minutes.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension caching word lengths only if length is greater than 3.

Django

lengths = {word: [1] for word in words if [2] [3] 3}

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Alen(word)

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong comparison operators or wrong expressions for length.

The comprehension stores the length of each word if its length is greater than 3.