Given a CloudFront distribution with an origin set to mybucket.s3.amazonaws.com and default cache behavior, what happens when a user requests a file not yet cached at the edge location?

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AWS - Cloud Computing Fundamentals

Given a CloudFront distribution with an origin set to mybucket.s3.amazonaws.com and default cache behavior, what happens when a user requests a file not yet cached at the edge location?

ACloudFront serves a stale cached version from another edge location

BCloudFront returns a 404 error immediately

CCloudFront redirects the user to the origin URL

DCloudFront fetches the file from the origin and caches it at the edge

Step-by-Step Solution

Solution:

Step 1: Understand CloudFront cache miss behavior
If a requested file is not in the edge cache, CloudFront retrieves it from the origin.
Step 2: Confirm caching after retrieval
After fetching, CloudFront caches the file at the edge location for future requests.
Final Answer:
CloudFront fetches the file from the origin and caches it at the edge -> Option D
Quick Check:
Cache miss triggers origin fetch and caching [OK]

Quick Trick: Cache miss = fetch from origin + cache [OK]

Common Mistakes:

MISTAKES

Assuming CloudFront returns error on cache miss
Thinking CloudFront redirects users to origin
Believing stale cache is served from other edges

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More AWS Quizzes

Given a CloudFront distribution with an origin set to mybucket.s3.amazonaws.com and default cache behavior, what happens when a user requests a file not yet cached at the edge location?

Step 1: Understand CloudFront cache miss behavior

Step 2: Confirm caching after retrieval

Final Answer:

Quick Check:

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