Low-level cache API in Django - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the cache object from Django's cache framework.

Django

from django.core.cache import [1]

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

ACacheHandler

Bcaches

Ccache_control

Dcache

Attempts:

3 left

💡 Hint

Common Mistakes

Importing caches instead of cache when only one cache is used.

Trying to import cache_control which is unrelated.

The cache object is imported from django.core.cache to use the low-level cache API.

2fill in blank

medium

Complete the code to set a cache key 'greeting' with value 'hello' that expires in 30 seconds.

Django

cache.[1]('greeting', 'hello', timeout=30)

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

Aget

Bset

Cdelete

Dclear

Attempts:

3 left

💡 Hint

Common Mistakes

Using get which only retrieves data.

Using delete which removes data.

The set method stores a value in the cache with an optional timeout.

3fill in blank

hard

Fix the error in the code to retrieve the value of cache key 'greeting'.

Django

value = cache.[1]('greeting')

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

Aadd

Bset

Cget

Dfetch

Attempts:

3 left

💡 Hint

Common Mistakes

Using set which stores data instead of retrieving.

Using fetch which is not a valid cache method.

The get method retrieves the value stored under a cache key.

4fill in blank

hard

Fill both blanks to delete a cache key 'greeting' and then clear all cache keys.

Django

cache.[1]('greeting')
cache.[2]()

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

Adelete

Bclear

Cset

Dget

Attempts:

3 left

💡 Hint

Common Mistakes

Using set or get instead of delete or clear.

Mixing up the order of methods.

The delete method removes a specific cache key, and clear removes all keys.

5fill in blank

hard

Fill all three blanks to add a cache key 'counter' with value 1 only if it does not exist, then increment it by 1.

Django

cache.[1]('counter', 1)
counter = cache.[2]('counter')
counter = counter [3] 1

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

Aadd

Bget

C+

Dset

Attempts:

3 left

💡 Hint

Common Mistakes

Using set instead of add which overwrites existing keys.

Trying to increment the key directly without retrieving.

The add method sets a key only if it does not exist. Then get retrieves it, and + increments the value.