CLF-C02 Storage Services 3 — Questions and Answers
Question 1: Which feature of Amazon S3 helps protect against accidental deletion by keeping multiple versions of an object?
- S3 Replication
- S3 Versioning (Correct answer)
- S3 Object Lock
- S3 Lifecycle Policies
Correct answer: S3 Versioning
S3 Versioning preserves every version of an object, allowing recovery from accidental deletions or overwrites.
Question 2: A media company needs shared file storage accessible by Windows-based EC2 instances using the SMB protocol. Which service should they use?
- Amazon EFS
- Amazon FSx for Windows File Server (Correct answer)
- Amazon EBS Multi-Attach
- AWS Storage Gateway
Correct answer: Amazon FSx for Windows File Server
Amazon FSx for Windows File Server provides fully managed Windows-native shared storage using the SMB protocol.
Question 3: Which S3 storage class is designed for data that is accessed less than once a year and can tolerate hours of retrieval time at the lowest cost?
- S3 Standard-IA
- S3 Glacier Instant Retrieval
- S3 Glacier Deep Archive (Correct answer)
- S3 One Zone-IA
Correct answer: S3 Glacier Deep Archive
S3 Glacier Deep Archive is AWS's lowest-cost storage class, designed for data retained for 7–10 years with 12-hour retrieval times.
Question 4: What happens to data stored on an EC2 Instance Store if the underlying host fails?
- Data is automatically replicated to EBS
- Data is backed up to S3 automatically
- Data is permanently lost (Correct answer)
- Data is migrated to another host
Correct answer: Data is permanently lost
Instance Store is ephemeral storage tied to the physical host; if the host fails or the instance stops, all data is permanently lost.
Question 5: Which AWS Storage Gateway mode is best for providing on-premises applications with cloud-backed file storage using NFS or SMB?
- Tape Gateway
- Volume Gateway
- File Gateway (Correct answer)
- Transit Gateway
Correct answer: File Gateway
File Gateway presents cloud-backed NFS/SMB file shares to on-premises applications, transparently storing files in S3.
Question 6: A company wants to enforce WORM (Write Once Read Many) compliance on S3 objects to meet regulatory requirements. Which feature enables this?
- S3 Versioning
- S3 Lifecycle Policies
- S3 Object Lock (Correct answer)
- S3 Intelligent-Tiering
Correct answer: S3 Object Lock
S3 Object Lock enforces WORM protection, preventing objects from being deleted or overwritten for a defined retention period.
Question 7: Which service would you use to transfer petabytes of data to AWS when internet bandwidth is too limited?
- AWS DataSync
- Amazon S3 Transfer Acceleration
- AWS Snowball (Correct answer)
- AWS Direct Connect
Correct answer: AWS Snowball
AWS Snowball is a physical data transfer appliance used to migrate large datasets (petabyte-scale) to AWS when internet transfer is impractical.
CLF-C02 Storage Services 3
Which feature of Amazon S3 helps protect against accidental deletion by keeping multiple versions of an object?