Rest API - Request and Response Format
You want to optimize your API to reduce bandwidth by sending full content only when it changes. Which combination of headers should you use?
You want to optimize your API to reduce bandwidth by sending full content only when it changes. Which combination of headers should you use?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify headers for bandwidth optimization
ETag allows the server to tell if content changed; max-age=0 with must-revalidate forces validation.Step 2: Evaluate options
Cache-Control: max-age=0, must-revalidate and ETag combines revalidation with ETag, so full content is sent only if changed.Step 3: Exclude other options
no-store disables caching, public without ETag can't validate changes, max-age without ETag sends full content always.Final Answer:
Cache-Control: max-age=0, must-revalidate and ETag -> Option AQuick Check:
max-age=0 + must-revalidate + ETag = bandwidth saved [OK]
Quick Trick: Use must-revalidate with ETag to send content only if changed [OK]
Common Mistakes:
MISTAKES- Using no-store disables caching, wasting bandwidth
- Missing ETag disables change detection
- Relying on max-age alone sends full content always
Master "Request and Response Format" in Rest API
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