Exam AWS Certified Developer - Associate DVA-C02 topic 1 question 235 discussion

Exam question from Amazon's AWS Certified Developer - Associate DVA-C02

Question #: 235
Topic #: 1

[All AWS Certified Developer - Associate DVA-C02 Questions]

A company has a three-tier application that is deployed in Amazon Elastic Container Service (Amazon ECS). The application is using an Amazon RDS for MySQL DB instance. The application performs more database reads than writes.

During times of peak usage, the application’s performance degrades. When this performance degradation occurs, the DB instance’s ReadLatency metric in Amazon CloudWatch increases suddenly.

How should a developer modify the application to improve performance?

A. Use Amazon ElastiCache to cache query results.
B. Scale the ECS cluster to contain more ECS instances.
C. Add read capacity units (RCUs) to the DB instance.
D. Modify the ECS task definition to increase the task memory.

Show Suggested Answer

Suggested Answer: A 🗳️

by Claire_KMT at Oct. 28, 2023, 2:28 p.m.

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SerialiDr

Highly Voted 11 months, 1 week ago

Selected Answer: A

Amazon ElastiCache can significantly enhance the read performance of the application by caching frequently accessed data. This reduces the load on the RDS database by serving repeated read requests from the cache rather than querying the database each time. This is particularly effective for applications with a high read-to-write ratio and can lead to a substantial reduction in the ReadLatency metric of the database.

upvoted 6 times

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