Per-view caching in Django - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is per-view caching in Django?

Per-view caching stores the output of a specific view so that future requests to that view return the cached response quickly without re-running the view code.

beginner

How do you enable per-view caching in Django?

You use the decorator @cache_page(timeout) on a view function or method, where timeout is the cache duration in seconds.

beginner

What does the timeout parameter in @cache_page(timeout) control?

It controls how long the cached response is stored before it expires and the view runs again to refresh the cache.

beginner

Can per-view caching improve website speed? How?

Yes. It saves the result of a view so Django can quickly return the cached page without running database queries or complex logic again.

intermediate

What is a limitation of per-view caching?

It caches the entire response for all users, so it may not work well for views that show user-specific data unless you customize the cache key.

Which decorator is used for per-view caching in Django?

A @cached_view

B @cache_response

C @cache_page

D @view_cache

The correct decorator for per-view caching in Django is @cache_page.

What does the timeout value in @cache_page(timeout) represent?

A Number of users cached

B Number of cached views

C Cache size in MB

D Cache duration in seconds

Timeout sets how many seconds the cached response is stored before expiring.

What happens when a cached view expires in Django?

A The view runs again and caches new output

B The cache is deleted permanently

C The server restarts

D The user is redirected

When cache expires, Django runs the view again and stores the fresh output.

Which type of data is NOT ideal for per-view caching?

A Frequently accessed pages

B User-specific data

C Public pages

D Static content

Per-view caching caches the same response for all users, so user-specific data can cause incorrect content to be shown.

Where do you import the @cache_page decorator from?

A django.views.decorators.cache

B django.cache.decorators

C django.utils.cache

D django.views.cache

The @cache_page decorator is imported from django.views.decorators.cache.

Explain how to add per-view caching to a Django view and why it helps performance.

Think about how caching saves time by reusing previous results.

Describe a scenario where per-view caching might cause problems and how to handle it.

Think about when different users need different pages.