Which headers help a CDN cache and validate browser content efficiently?

Problem Statement

Explanation

Cache-Control sets TTL and revalidation behavior. ETag or Last-Modified enables conditional requests. Vary declares which request headers are part of the cache key (e.g., Accept-Encoding, Authorization when needed). These controls prevent stale or incorrect variants from being served.

Code Solution

SolutionRead Only

Cache-Control: public, max-age=300, stale-while-revalidate=30
ETag: "ab12"
Vary: Accept-Encoding

Practice Sets

This question appears in the following practice sets:

Caching & CDN Architecture

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Which headers help a CDN cache and validate browser content efficiently?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

Which headers help a CDN cache and validate browser content efficiently?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which statement best describes the Single Responsibility Principle?

Open–Closed Principle encourages what practice when adding features?

High-Level Design (HLD) typically focuses on which artifacts?

Which UML diagram best captures interactions over time between components?

Which pairing describes a healthy design goal?

More from System Design

Master Interviews
Anywhere, Anytime