CLF-C02 Storage Services 4 — Questions and Answers
Question 1: Which S3 storage class automatically moves data between frequent and infrequent access tiers based on changing access patterns without retrieval fees?
- S3 Standard-IA
- S3 Intelligent-Tiering (Correct answer)
- S3 One Zone-IA
- S3 Glacier Instant Retrieval
Correct answer: S3 Intelligent-Tiering
S3 Intelligent-Tiering monitors access patterns and automatically moves objects between tiers to optimize costs, with no retrieval charges.
Question 2: An EBS volume in us-east-1a needs to be used by an EC2 instance in us-east-1b. What must be done?
- EBS volumes can be used across AZs without any action
- Create a snapshot and restore it in the target AZ (Correct answer)
- Enable EBS Multi-Attach across AZs
- Use S3 to transfer the data between AZs
Correct answer: Create a snapshot and restore it in the target AZ
EBS volumes are locked to a single Availability Zone; to move to another AZ, you must create a snapshot and restore it in the target AZ.
Question 3: Which Amazon S3 feature enables low-latency access to frequently accessed objects while storing the full dataset in S3?
- S3 Transfer Acceleration (Correct answer)
- S3 Select
- S3 Intelligent-Tiering Archive
- S3 Replication
Correct answer: S3 Transfer Acceleration
S3 Transfer Acceleration uses CloudFront edge locations to speed up uploads and downloads to S3 over long distances.
Question 4: Which EBS volume type is recommended for boot volumes and general-purpose workloads on AWS?
- io1 (Provisioned IOPS SSD)
- gp3 (General Purpose SSD) (Correct answer)
- st1 (Throughput Optimized HDD)
- sc1 (Cold HDD)
Correct answer: gp3 (General Purpose SSD)
gp3 is the latest general-purpose SSD EBS volume type, recommended for most workloads including boot volumes, offering a good balance of price and performance.
Question 5: A startup stores user-generated images in S3 but wants to query only specific metadata fields without downloading each file. Which S3 feature helps?
- S3 Object Lock
- S3 Select (Correct answer)
- S3 Versioning
- S3 Replication
Correct answer: S3 Select
S3 Select allows you to retrieve a subset of data from within an S3 object using SQL expressions, reducing data transfer costs.
Question 6: Which AWS service is used to synchronize on-premises file systems or S3 buckets to another AWS storage service with automated scheduling?
- AWS Snowball
- AWS DataSync (Correct answer)
- AWS Transfer Family
- AWS Storage Gateway
Correct answer: AWS DataSync
AWS DataSync is a managed data transfer service that automates moving data between on-premises storage, S3, EFS, and FSx on a schedule.
Question 7: Which characteristic makes Amazon S3 inherently different from Amazon EBS?
- S3 is block storage; EBS is object storage
- S3 is object storage accessible via HTTP; EBS is block storage attached to EC2 (Correct answer)
- S3 can only be used within a VPC; EBS is publicly accessible
- S3 supports only 5 GB files; EBS supports unlimited size
Correct answer: S3 is object storage accessible via HTTP; EBS is block storage attached to EC2
S3 is an object storage service accessed via HTTP/HTTPS APIs, while EBS provides block-level storage volumes attached directly to EC2 instances.
CLF-C02 Storage Services 4
Which S3 storage class automatically moves data between frequent and infrequent access tiers based on changing access patterns without retrieval fees?