Describe the Difference Between an Error Log and an Access Log F5N3 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   To analyze traffic patterns and understand client behavior on an NGINX server, which log should you examine?

   • AThe configuration log
   • BThe error log
   • CThe system log
   • DThe access log
   Reveal Solution Discussion Select an answer first
2. 2foundation · medium

   A system administrator is investigating why a web application returned HTTP 500 errors for several users. Which statement correctly compares the information found in the NGINX error log versus the access log for this incident?

   • ABoth logs contain identical information, but the error log is stored in a binary format while the access log is stored in plain text.
   • BThe error log contains details about the upstream server connection failures, while the access log records the HTTP status code and request URI for each affected request.
   • CThe error log records the HTTP method and response time for each request, while the access log records only fatal errors that cause the worker process to terminate.
   • DThe access log contains the stack trace of the application exception, while the error log records the client IP address and user agent for each request.
   Reveal Solution Discussion Select an answer first
4. 3expert · hard

   An administrator is troubleshooting a problem where NGINX is not logging any access log entries for a specific virtual host, even though the server is receiving traffic. The error log shows no errors. What is the most likely cause?

   • AThe error log is capturing all the traffic instead of the access log
   • BThe access log file is full and cannot be written to
   • CThe access log is disabled for that virtual host
   • DThe virtual host is not receiving any traffic
   Reveal Solution Discussion Select an answer first
5. 4expert · hard

   An NGINX server is configured as a reverse proxy for multiple upstream applications. Clients report occasional 504 Gateway Timeout errors. The administrator has already checked the access log and confirmed that the 504s occur only for one specific upstream. They now need to determine whether the timeout is caused by the upstream application being slow or by NGINX's proxy_read_timeout being too short. Which approach would provide the most definitive answer?

   • AExamine the error log for upstream timeout messages and correlate with the access log timestamps
   • BIncrease proxy_read_timeout and see if the 504s stop
   • CDisable proxy_read_timeout temporarily to see if the 504s disappear
   • DCheck the upstream application's own logs to see if it received the requests
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   Which type of information is recorded in the NGINX error log?

   • ADetails about configuration problems and internal server errors
   • BA list of all IP addresses that have accessed the server
   • CA record of every client request with status codes and user agents
   • DA summary of successful requests and their response times
   Reveal Solution Discussion Select an answer first