Describe Why Directives Use a Shared Memory Zone F5N1 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A company runs NGINX with multiple worker processes. They are using the sticky directive to maintain session affinity. The administrator notices that sometimes a client's request is routed to a different upstream server than expected. What is the most likely cause of this issue?

   • AThe master process is reassigning sessions to balance load
   • BThe worker processes are not using the same configuration file
   • CThe sticky directive is not supported with multiple worker processes
   • DThe shared memory zone is too small and is evicting old session mappings
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   Why do NGINX directives such as limit_req and limit_conn use a shared memory zone?

   • ATo allow each worker process to maintain its own independent copy of the state, improving isolation.
   • BTo store configuration directives in a format that is faster to parse at startup.
   • CTo share state across worker processes so that all workers enforce the same limits and policies consistently.
   • DTo enable communication between NGINX and upstream servers without network overhead.
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A company uses NGINX to serve a large number of static files. They want to implement a simple rate limit to prevent any single IP from making more than 100 requests per minute. They are considering whether to use the limit_req_zone directive. What is the primary reason this directive requires a shared memory zone?

   • ATo store the rate-limit configuration so it can be changed without reloading NGINX
   • BTo share the rate-limit counters among all worker processes so the limit is enforced globally
   • CTo store the rate-limit counters so they persist across NGINX restarts
   • DTo provide a backup of the rate-limit counters in case a worker process crashes
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   Which NGINX directive requires a shared memory zone to function correctly?

   • Aserver_name
   • Broot
   • Climit_req
   • Dproxy_pass
   Reveal Solution Discussion Select an answer first
6. 15expert · hard

   A company runs a critical API on NGINX with 16 worker processes. They use both limit_req_zone and limit_conn_zone directives. The administrator wants to ensure that rate limiting and connection limiting are accurate even under high load. What is the most important consideration when configuring the shared memory zones for these directives?

   • AThe shared memory zones must be replicated to each worker process for faster access
   • BThe shared memory zones must be allocated in kernel space for better performance
   • CBoth directives must use the same shared memory zone to save memory
   • DEach directive must use a separate shared memory zone to avoid interference
   Reveal Solution Discussion Select an answer first