AWS Certified Database – Specialty — Question 21

A company with branch offices in Portland, New York, and Singapore has a three-tier web application that leverages a shared database. The database runs on
Amazon RDS for MySQL and is hosted in the us-west-2 Region. The application has a distributed front end deployed in the us-west-2, ap-southheast-1, and us- east-2 Regions.
This front end is used as a dashboard for Sales Managers in each branch office to see current sales statistics. There are complaints that the dashboard performs more slowly in the Singapore location than it does in Portland or New York. A solution is needed to provide consistent performance for all users in each location.
Which set of actions will meet these requirements?

Answer options

• A. Take a snapshot of the instance in the us-west-2 Region. Create a new instance from the snapshot in the ap-southeast-1 Region. Reconfigure the ap- southeast-1 front-end dashboard to access this instance.
• B. Create an RDS read replica in the ap-southeast-1 Region from the primary RDS DB instance in the us-west-2 Region. Reconfigure the ap-southeast-1 front- end dashboard to access this instance.
• C. Create a new RDS instance in the ap-southeast-1 Region. Use AWS DMS and change data capture (CDC) to update the new instance in the ap-southeast-1 Region. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.
• D. Create an RDS read replica in the us-west-2 Region where the primary instance resides. Create a read replica in the ap-southeast-1 Region from the read replica located on the us-west-2 Region. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.

Correct answer: B

Explanation

The correct answer is B because creating an RDS read replica in the ap-southeast-1 Region allows for low-latency access to the database for users in Singapore, improving performance. The other options either involve unnecessary complexity or do not address the issue of latency for users in that specific region.