Question

An application has a database in an AWS RDS Instance. When the traffic is high, the application's response time grows as there are many read queries to the RDS database.

Which of the following can be used to decrease the response time for the application?

A. Place a CloudFront distribution in front of the database.

B. Enable Read Replicas for the database.

C. Change the database from RDS to DynamoD.

D. Enable Multi-AZ for the database.

Answer 1

Answer - B.

The AWS Documentation mentions the following.

You can reduce the load on your source DB instance by routing read queries from your applications to the read replica.

Read replicas allow you to elastically scale out beyond the capacity constraints of a single DB Instance for read-heavy database workloads.

Option A is incorrect because the RDS database cannot be the origin of a CloudFront distribution.

Option C is incorrect because changing the database type is not the ideal approach.

Option D is incorrect because Multi-AZ is used for fault-tolerant scenarios for the database.