Describe How to Troubleshoot Various Response F5N4 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   An NGINX administrator receives a 502 Bad Gateway response from a reverse proxy. Which condition is the most likely cause of this status code?

   • AThe client does not have permission to access the requested resource.
   • BNGINX could not obtain a valid response from the upstream server.
   • CThe client sent a malformed request that NGINX could not parse.
   • DThe requested resource has been permanently moved to a new URL.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   A client receives a 304 Not Modified response from an NGINX server. What does this status code indicate about the requested resource?

   • AThe resource has not been modified since the client's last request, so the cached copy can be used.
   • BThe resource is temporarily unavailable and the client should retry later.
   • CThe resource has been deleted from the server.
   • DThe resource has been permanently moved to a new location.
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A client reports that a JSON API response contains garbled characters for non-ASCII data. The response headers show 'Content-Type: application/json' but no charset parameter. The raw response bytes appear to be UTF-8 encoded. What is the most likely cause of the garbled display?

   • ANGINX is stripping the charset parameter from the upstream response
   • BThe client is interpreting the response as ISO-8859-1 because no charset is specified
   • CThe upstream is sending the body in UTF-16 but the Content-Type says UTF-8
   • DNGINX is compressing the response with gzip and the client cannot decompress it
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   An administrator uses `curl -I https://example.com` and sees the header `Content-Encoding: gzip`. What does this header indicate about the response body?

   • AThe body is sent in chunks to the client.
   • BThe body is compressed with gzip and must be decompressed by the client.
   • CThe body is encrypted with SSL/TLS.
   • DThe body is a binary file that cannot be displayed.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   A response includes the header `Cache-Control: no-store`. What does this header instruct the client or intermediary caches to do?

   • AStore the response in cache but revalidate it before each use.
   • BCache the response for a maximum of one hour.
   • CDo not store any part of the response in any cache.
   • DAllow only the browser to cache the response, not intermediary proxies.
   Reveal Solution Discussion Select an answer first