Question

A developer builds a REST API running behind a load balancer so that clients can query stock information. The back-end database data is refreshed every 15 minutes, but clients poll the API every 2 minutes. The developer must reduce database load without changing the client side. Which constraint must the engineer address?

Accepted Answer

B. Use of Cache-Control headers and max-age validation is not enforced.

Answer

The load balancer is not configured to use memcached as the primary back end.

Answer

Request throttling on the load balancer database is not enabled.

Answer

Dynamic IP deny listing, which allows requests every 15 minutes, is not configured.