Modify or Tune a Memory Zone Configuration F5N2 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   When tuning the size of a rate-limiting memory zone, what is the primary consideration?

   • AThe size should be set to the maximum request rate multiplied by the number of worker processes
   • BThe size should be set to the total amount of RAM on the server
   • CThe size must be large enough to hold all unique keys expected during the rate-limit window, but not so large that it wastes memory
   • DThe size should be set to the maximum number of concurrent connections to the server
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2. 2application · medium

   An NGINX server uses a `limit_req_zone` with a size of 5m. The server handles a mix of traffic, and the zone is frequently full, causing some requests to be rejected with 503 errors. The administrator wants to reduce these rejections while keeping memory usage reasonable. What should the administrator do?

   • ADisable the `limit_req` directive entirely.
   • BDecrease the zone size to 2m to force more aggressive eviction.
   • CIncrease the rate limit value in the `limit_req` directive.
   • DIncrease the zone size to 10m and reload NGINX.
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4. 3foundation · easy

   Which command is used to gracefully reload the NGINX configuration?

   • Anginx -s reload
   • Bnginx -s quit
   • Cnginx -t
   • Dnginx -s stop
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5. 4foundation · easy

   Which directive is used to define a memory zone for rate limiting in NGINX?

   • Alimit_conn_zone
   • Bproxy_cache_path
   • Climit_req_zone
   • Dupstream
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6. 5expert · hard

   An administrator has a `limit_req_zone` defined as `zone=api_limit:10m rate=10r/s`. The zone is used in multiple `location` blocks. The administrator wants to change the rate to 20r/s for one specific location only, without affecting other locations. What is the correct approach?

   • AUse a variable in the `limit_req` directive to set the rate dynamically.
   • BAdd a `limit_req` directive in the specific location with a new rate.
   • CChange the rate in the existing `limit_req_zone` directive.
   • DDefine a new `limit_req_zone` with a different name and rate, and use it in the specific location.
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