AWS Certified Developer - Associate DVA-C02 — Topic 1 Question 119

Question

A real-time messaging application uses Amazon API Gateway WebSocket APIs with backend HTTP service. A developer needs to build a feature in the application to identify a client that keeps connecting to and disconnecting from the WebSocket connection. The developer also needs the ability to remove the client. Which combination of changes should the developer make to the application to meet these requirements? (Choose two.)

Accepted Answer

Correct answer: D, E. The correct answer is D, E. Option D: Add code to track the client status in Amazon ElastiCache in the backend service. Option E: Implement $connect and $disconnect routes in the backend service. Amazon ElastiCache provides in-memory caching (Redis/Memcached) to reduce latency and offload the database. This option meets the real-time / low-latency performance requirement.

AWS Certified Developer - Associate DVA-C02 — Question 119