AWS Certified DevOps Engineer - Professional DOP-C02 — Topic 1 Question 119

Question

A company is testing a web application that runs on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Auto Scaling group across multiple Availability Zones. The company uses a blue/green deployment process with immutable instances when deploying new software. During testing, users are being automatically logged out of the application at random times. Testers also report that, when a new version of the application is deployed, all users are logged out. The development team needs a solution to ensure users remain logged in across scaling events and application deployments. What is the MOST operationally efficient way to ensure users remain logged in?

Accepted Answer

Correct answer: D. The correct answer is D. Option D: Modify the application to store user session information in an Amazon ElastiCache cluster. Amazon ElastiCache provides in-memory caching (Redis/Memcached) to reduce latency and offload the database. By spanning multiple Availability Zones / adding redundancy, this option provides the high availability and resilience required.

AWS Certified DevOps Engineer - Professional DOP-C02 — Question 119