AWS Certified Solutions Architect – Associate (SAA-C03) — Question 738

A company maintains its accounting records in a custom application that runs on Amazon EC2 instances. The company needs to migrate the data to an AWS managed service for development and maintenance of the application data. The solution must require minimal operational support and provide immutable, cryptographically verifiable logs of data changes.

Which solution will meet these requirements MOST cost-effectively?

Answer options

• A. Copy the records from the application into an Amazon Redshift cluster.
• B. Copy the records from the application into an Amazon Neptune cluster.
• C. Copy the records from the application into an Amazon Timestream database.
• D. Copy the records from the application into an Amazon Quantum Ledger Database (Amazon QLDB) ledger.

Correct answer: D

Explanation

Amazon QLDB is a fully managed ledger database designed specifically to provide an immutable, transparent, and cryptographically verifiable transaction log of all application data changes. Other services like Amazon Redshift, Amazon Neptune, and Amazon Timestream do not natively support built-in cryptographic verification of data history, making them unsuitable for these strict compliance requirements without significant custom engineering.