CLF-C02 Storage Services 5 — Questions and Answers
Question 1: Which S3 storage class stores data in only one Availability Zone, providing lower cost but reduced durability?
- S3 Standard-IA
- S3 One Zone-IA (Correct answer)
- S3 Glacier Instant Retrieval
- S3 Intelligent-Tiering
Correct answer: S3 One Zone-IA
S3 One Zone-IA stores data in a single AZ at 20% lower cost than Standard-IA, but data is lost if the AZ is destroyed.
Question 2: A company needs to maintain copies of S3 objects in a different AWS Region for disaster recovery. Which feature supports this?
- S3 Versioning
- S3 Cross-Region Replication (Correct answer)
- S3 Object Lock
- S3 Lifecycle Policies
Correct answer: S3 Cross-Region Replication
S3 Cross-Region Replication (CRR) automatically copies objects from a source bucket to a destination bucket in a different AWS Region.
Question 3: Which AWS service allows on-premises backup software to store data in AWS using an iSCSI block storage interface?
- File Gateway
- Tape Gateway
- Volume Gateway (Correct answer)
- Amazon EBS
Correct answer: Volume Gateway
Volume Gateway presents iSCSI block storage volumes to on-premises applications, backed by Amazon S3 with optional EBS snapshots.
Question 4: What durability does Amazon S3 Standard guarantee for stored objects?
- 99% (two nines)
- 99.9% (three nines)
- 99.99% (four nines)
- 99.999999999% (eleven nines) (Correct answer)
Correct answer: 99.999999999% (eleven nines)
Amazon S3 is designed for 99.999999999% (11 nines) durability by redundantly storing data across multiple AZs within a Region.
Question 5: Which EBS volume type is best suited for a big data analytics workload requiring high sequential throughput rather than high IOPS?
- gp3 (General Purpose SSD)
- io2 (Provisioned IOPS SSD)
- st1 (Throughput Optimized HDD) (Correct answer)
- sc1 (Cold HDD)
Correct answer: st1 (Throughput Optimized HDD)
st1 (Throughput Optimized HDD) is designed for large, sequential workloads like big data, data warehouses, and log processing at low cost.
Question 6: A company is migrating 80 TB of archival data to AWS and needs the transfer completed within 10 days. Which service is most practical?
- S3 Transfer Acceleration
- AWS Direct Connect
- AWS Snowball Edge (Correct answer)
- AWS DataSync over internet
Correct answer: AWS Snowball Edge
AWS Snowball Edge is a physical device that can transfer 80 TB offline within days, making it far faster than any internet-based option for this scale.
Question 7: Which Amazon FSx option provides a high-performance file system optimized for compute-intensive workloads like machine learning and HPC?
- FSx for Windows File Server
- FSx for NetApp ONTAP
- FSx for Lustre (Correct answer)
- FSx for OpenZFS
Correct answer: FSx for Lustre
Amazon FSx for Lustre is a high-performance parallel file system built for compute-intensive workloads including HPC, ML, and media processing.
CLF-C02 Storage Services 5
Which S3 storage class stores data in only one Availability Zone, providing lower cost but reduced durability?