AWS Certified Solutions Architect – Associate (SAA-C03) — Question 59

A company is using a SQL database to store movie data that is publicly accessible. The database runs on an Amazon RDS Single-AZ DB instance. A script runs queries at random intervals each day to record the number of new movies that have been added to the database. The script must report a final total during business hours.
The company's development team notices that the database performance is inadequate for development tasks when the script is running. A solutions architect must recommend a solution to resolve this issue.
Which solution will meet this requirement with the LEAST operational overhead?

Answer options

• A. Modify the DB instance to be a Multi-AZ deployment.
• B. Create a read replica of the database. Configure the script to query only the read replica.
• C. Instruct the development team to manually export the entries in the database at the end of each day.
• D. Use Amazon ElastiCache to cache the common queries that the script runs against the database.

Correct answer: B

Explanation

Creating a read replica allows the script to run its queries without impacting the performance of the main database, as it will only interact with the replica. This solution has the least operational overhead compared to modifying the DB instance to Multi-AZ, which involves more complexity and cost. Manual exports and caching common queries would not effectively address the performance issue during script execution.