Exam AWS Certified DevOps Engineer - Professional DOP-C02 topic 1 question 119 discussion

Exam question from Amazon's AWS Certified DevOps Engineer - Professional DOP-C02

Question #: 119
Topic #: 1

[All AWS Certified DevOps Engineer - Professional DOP-C02 Questions]

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?

A. Enable smart sessions on the load balancer and modify the application to check for an existing session.
B. Enable session sharing on the load balancer and modify the application to read from the session store.
C. Store user session information in an Amazon S3 bucket and modify the application to read session information from the bucket.
D. Modify the application to store user session information in an Amazon ElastiCache cluster.

Show Suggested Answer

Suggested Answer: D 🗳️

by 2pk at May 14, 2023, 2:32 a.m.

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thanhnv142

Highly Voted 1 year, 4 months ago

D is correct: <During testing, users are being automatically logged out of the application at random times>: the cause is there is no data storage that stores user's session. We need a session data storage to store user session

upvoted 5 times

2 years, 1 month ago

Why not C? Compared to D C is serverless thus more operationally efficient.

upvoted 2 times

dzn

1 year, 4 months ago

This is why many web application frameworks support Redis and Memcached session. Also S3 is expensive to read, latency.

upvoted 3 times

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lunt

2 years, 1 month ago

like comment by accident. S3 is an object store, its not a mounted FS as such, potential performance issues & consistency rule it out. Session data - keep it local, caching system like redis or DB. C actually requires a lot more work as who is now managing the sessions, the bucket, keeping all in sync?

upvoted 2 times

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