Template fragment caching in Django - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is template fragment caching in Django?

Template fragment caching stores parts of a template's rendered output to speed up page loading by reusing cached HTML instead of rendering it again.

beginner

How do you mark a part of a Django template for fragment caching?

Use the {% cache %} template tag with a cache timeout and a cache key to wrap the part you want to cache.

beginner

Example of using {% cache %} tag in Django template?

Example: {% cache 600 sidebar %} ... HTML for sidebar ... {% endcache %} caches the sidebar for 600 seconds.

intermediate

Why use template fragment caching instead of full page caching?

Fragment caching lets you cache only slow or complex parts of a page, allowing dynamic parts to update without caching the whole page.

intermediate

What happens if the cache key changes in template fragment caching?

If the cache key changes, Django treats it as a new cache entry and renders the fragment again, storing the new output.

Which Django template tag is used for fragment caching?

A {% loadcache %}

B {% cache %}

C {% fragment %}

D {% storecache %}

The {% cache %} tag is used to mark template fragments for caching.

What does the number in {% cache 300 key %} represent?

A Cache priority level

B Cache key length

C Number of times to cache

D Cache timeout in seconds

The number 300 means the fragment is cached for 300 seconds (5 minutes).

If a cached fragment is expired, what does Django do?

A Skips rendering the fragment

B Shows an error

C Renders the fragment again and caches it

D Uses the old cached version anyway

Django re-renders the fragment and stores the new output in cache.

Can template fragment caching improve performance when only part of a page is slow?

A Yes, by caching just the slow parts

B No, it caches the whole page

C No, it slows down rendering

D Yes, but only for static pages

Fragment caching targets slow parts to speed up page load without caching everything.

What must you do to use {% cache %} tag in your Django template?

A Load the cache template tag library with {% load cache %}

B Import cache in views.py

C Enable caching in settings.py only

D No setup needed

You must load the cache tag library in the template using {% load cache %} before using {% cache %}.

Explain how to implement template fragment caching in a Django template and why it helps performance.

Think about wrapping slow parts of your template with a special tag.

Describe what happens when a cached fragment expires and how Django handles it.

Consider what Django does when the cache is no longer valid.