Define the Cache in the Http Context F5N2 Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   What is the default cache key used by NGINX if `proxy_cache_key` is not specified?

   • A$request_uri
   • B$scheme$host$request_uri
   • C$remote_addr$request_uri
   • D$uri
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2. 7foundation · easy

   Which directive controls which HTTP methods are eligible for caching?

   • Aproxy_cache_key
   • Bproxy_cache_bypass
   • Cproxy_cache_valid
   • Dproxy_cache_methods
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4. 8expert · hard

   An administrator is configuring a cache for a REST API that uses query parameters for filtering. The default cache key is '$scheme$proxy_host$request_uri'. The administrator wants to cache responses for different query parameter combinations separately. What is the correct approach?

   • ASet proxy_cache_bypass $args;
   • BSet proxy_cache_key to '$scheme$proxy_host$uri';
   • CUse the default cache key, as it already includes the query string.
   • DSet proxy_cache_key to '$scheme$proxy_host$request_uri$is_args$args';
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5. 9expert · hard

   A company has a cache configured with proxy_cache_path /var/cache/nginx keys_zone=cache:10m max_size=1g;. They are experiencing a high cache miss rate and notice that the cache directory is using very little disk space. The administrator suspects the keys_zone is too small, causing keys to be evicted. What is the most likely cause of the high miss rate?

   • AThe max_size is too small, causing cached data to be evicted from disk.
   • BThe keys_zone is too small, causing cache keys to be evicted before the data is accessed again.
   • CThe proxy_cache_valid directive is not set, so responses are not cached.
   • DThe proxy_cache_key is not set, so all responses are stored under the same key.
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6. 10expert · hard

   A company's NGINX cache is serving stale content for 404 errors. The administrator wants to cache 404 responses for only 5 minutes, while caching 200 responses for 1 hour. They have configured proxy_cache_valid 200 1h; proxy_cache_valid 404 5m;. However, 404 responses are still being served from the cache for longer than 5 minutes. What could be the cause?

   • AThe proxy_cache_key is set to a static value, causing all 404 responses to share the same cache entry.
   • BThe upstream server is sending a Cache-Control header that overrides the proxy_cache_valid setting.
   • CThe 404 responses are not being cached at all.
   • DThe proxy_cache_valid directive is not allowed in the http context.
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