Exams / CLF-C02 / Storage / Question 1
CLF-C02 practice question: Storage (1 of 3)
Cloud Technology and Services A free question from our original CLF-C02 practice exam. Try it, then open the answer to see why each option is right or wrong.
A company must keep scanned contracts for ten years. Contracts are opened often in their first 30 days, rarely after that, and almost never after one year, when a wait of several hours to retrieve one is acceptable. How can the company lower its storage costs with the least ongoing effort?
Choose one answer.
- AA. Keep every contract in S3 Standard for the full ten years to keep access fast
- BB. Use S3 Lifecycle rules: Standard-IA after 30 days, then Glacier Deep Archive after a year
- CC. Copy the contracts to Amazon EBS volumes attached to an EC2 instance for storage
- DD. Store all of the contracts in S3 One Zone-IA from the day they are uploaded
Show the answer and explanation
Answer: B
- A. Wrong: S3 Standard is designed for frequently accessed data, so keeping rarely used files there for years costs more than necessary.
- B. Right: Correct. Lifecycle transitions move objects to cheaper classes automatically as they age, matching the access pattern.
- C. Wrong: EBS is block storage for EC2 and costs more for long-term archiving. It would also need an instance and manual management.
- D. Wrong: One Zone-IA keeps data in a single Availability Zone, so it is not suited to the only copy of important records and is still not an archive tier.
Explanation
S3 Lifecycle rules automate cost savings. Transition actions move objects to lower-cost storage classes after a set number of days, and expiration actions can delete them at the end of their retention. S3 Standard-IA suits data accessed about once a month, and S3 Glacier Deep Archive is the lowest-cost class for data accessed less than once a year, with retrieval in hours.
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