AWS Certified Cloud Practitioner — Question 899

A company plans to create a data lake that uses Amazon S3.
Which factor will have the MOST effect on cost?

Answer options

• A. The selection of S3 storage tiers
• B. Charges to transfer existing data into Amazon S3
• C. The addition of S3 bucket policies
• D. S3 ingest fees for each request

Correct answer: A

Explanation

Choosing the appropriate S3 storage tier has the most significant impact on data lake expenses because storage pricing varies drastically between tiers like S3 Standard and S3 Glacier. Inbound data transfer into Amazon S3 is free, and creating S3 bucket policies does not incur any charges. While request fees do apply, they represent a minor fraction of the cost compared to the ongoing storage fees of a massive data lake.