SAA-C03 Question #443: Real Exam Question with Answer & Explanation

Question

A company wants to migrate applications from its on-premises servers to AWS. As a first step, the company is modifying and migrating a non-critical application to a single Amazon EC2 instance. The application will store information in an Amazon S3 bucket. The company needs to follow security best practices when deploying the application on AWS. Which approach should the company take to allow the application to interact with Amazon S3?

Options

• AStore the files in an Amazon S3 bucket. Use the S3 Glacier Instant Retrieval storage class.
• BStore the files in an Amazon S3 bucket. Use the S3 Standard storage class. Create an S3
• CStore the files on an Amazon Elastic Block Store (Amazon EBS) volume. Use Amazon Data
• DStore the files on an Amazon Elastic File System (Amazon EFS) mount. Configure EFS lifecycle

Explanation

The company's requirements are: Store gigabytes of rarely accessed files daily. Files must be available within minutes during the first year. Retain files for 7 years cost-effectively. The S3 Glacier Instant Retrieval storage class provides low-cost, long-term storage for data accessed occasionally, with millisecond retrieval time. This fits the requirement for availability within minutes during the first year. After one year, transitioning files to S3 Glacier Deep Archive (the lowest cost S3 storage class) with longer retrieval times is cost-effective for data retention Option B uses S3 Standard and Glacier Flexible Retrieval, which is higher cost during the first year and slower retrieval times. Option C is less cost-efficient because EBS volumes are expensive for rarely accessed data and snapshots incur additional costs. Option D uses EFS, which is designed for low-latency file storage but is more expensive than S3 Glacier classes for long-term archival.

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