Describe How to Test a New Configuration Before Applying It F5N4 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   An administrator runs 'nginx -t' and receives the following output: 'nginx: configuration file /etc/nginx/nginx.conf test is successful'. What should the administrator do next?

   • AReload NGINX using 'nginx -s reload' to apply the changes.
   • BRestart the NGINX service to apply the changes.
   • CRun 'nginx -t' again to confirm the result.
   • DCheck the error log for additional warnings.
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   An administrator runs 'nginx -t' and sees the following output: 'nginx: [warn] the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:2'. What should the administrator do to resolve this warning?

   • AChange the 'user' directive to a different user.
   • BRun the 'nginx -t' command with sudo or as the root user.
   • CIgnore the warning and proceed with the reload.
   • DRemove the 'user' directive from the configuration file.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   An administrator modifies the NGINX configuration to change the worker_processes value from 4 to 8. After running 'nginx -t' and seeing 'syntax is ok' and 'test is successful', the administrator sends 'nginx -s reload'. What will happen to existing connections?

   • AExisting connections will continue to be handled by the old worker processes until they complete.
   • BExisting connections will be gracefully terminated and re-established with the new configuration.
   • CExisting connections will be immediately dropped.
   • DExisting connections will be migrated to the new worker processes immediately.
   Reveal Solution Discussion Select an answer first
5. 4expert · hard

   An administrator is managing a high-traffic NGINX server. The administrator modifies the configuration to change the 'keepalive_timeout' value. After running 'nginx -t' and seeing 'test is successful', the administrator sends 'nginx -s reload'. A few minutes later, the administrator notices that some clients are receiving 502 Bad Gateway errors. What is the most likely cause of this issue?

   • AThe new configuration has a syntax error that was not caught by 'nginx -t'.
   • BThe new 'keepalive_timeout' value is too low, causing upstream connections to be closed prematurely.
   • CThe reload caused a brief interruption in service, and some requests were lost.
   • DThe reload caused the NGINX master process to restart, dropping all existing connections.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A system administrator is preparing to deploy a new configuration that changes the listen port from 80 to 8080. The administrator runs 'nginx -t' and receives the following output: 'nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)'. What is the most likely cause of this error?

   • AThe NGINX user does not have permission to bind to port 8080.
   • BThe configuration file has a syntax error in the listen directive.
   • CThe configuration file is missing a closing brace.
   • DAnother process is already listening on port 8080.
   Reveal Solution Discussion Select an answer first