Explain What Is Unique to NGINX as a Cache Server F5N2 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   Which HTTP response header does NGINX use to determine the freshness lifetime of a cached response when the `Cache-Control` header is absent?

   • AAge
   • BExpires
   • CLast-Modified
   • DETag
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2. 17expert · hard

   A news portal uses NGINX caching with proxy_cache_valid 200 10m. The origin server sends Cache-Control: max-age=3600 for some responses. The admin wants to respect the origin's Cache-Control when present, but use a default of 10 minutes when the origin does not send Cache-Control. What is the correct approach?

   • AUse proxy_ignore_headers Cache-Control to ignore the origin's header.
   • BSet proxy_cache_valid 200 10m and also set proxy_cache_key to include the Cache-Control header.
   • CSet proxy_cache_valid 200 1h to override the origin's Cache-Control.
   • DUse proxy_cache_valid 200 10m and rely on NGINX to respect the origin's Cache-Control header.
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4. 18application · medium

   A high-traffic website uses NGINX caching with a proxy_cache_path of 10g. The cache is frequently full, and they notice that cache hit ratio drops during peak hours. They have already tuned the cache key. What is the most effective next step to improve cache performance?

   • ASet proxy_cache_valid to a shorter time to refresh content more often.
   • BDisable caching for dynamic pages to reduce cache size.
   • CIncrease the max_size of the cache path to accommodate more cached items.
   • DReduce the cache key to include fewer variables.
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5. 19foundation · easy

   Which feature distinguishes NGINX as a cache server from a standalone cache like Redis?

   • AIt provides a built-in web application framework
   • BIt uses a key-value store for arbitrary data
   • CIt stores data in memory only
   • DIt can act as a reverse proxy and cache in one
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6. 20application · medium

   A media company runs NGINX as a reverse proxy for a video streaming API. They notice that cache hit ratio is low because many requests to the same video URL include a tracking parameter (e.g., ?source=facebook) that changes frequently. They want to cache the video content regardless of the tracking parameter, but still serve different cached copies for different video IDs. What should they do?

   • ASet the proxy_cache_key to $request_uri, which includes the full URI with query string.
   • BDefine a custom cache key that includes only the request URI and the video ID, excluding the tracking parameter.
   • CIncrease the proxy_cache_path max_size to store more cached entries.
   • DDisable caching for requests that contain a query string.
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