AWS Certified Developer – Associate — Question 96

A company caches session information for a web application in an Amazon DynamoDB table. The company wants an automated way to delete old items from the table.

What is the simplest way to do this?

Answer options

• A. Write a script that deletes old records; schedule the script as a cron job on an Amazon EC2 instance.
• B. Add an attribute with the expiration time; enable the Time To Live feature based on that attribute.
• C. Each day, create a new table to hold session data; delete the previous day’s table.
• D. Add an attribute with the expiration time; name the attribute ItemExpiration.

Correct answer: B

Explanation

The correct answer is B because enabling the Time To Live feature allows DynamoDB to automatically manage and delete expired items based on the specified attribute, making it the simplest solution. Option A requires manual intervention with a script, C involves a cumbersome process of creating and deleting tables daily, and D is incorrect because it does not leverage the built-in Time To Live functionality.