CLF-C02 Question 230
Single answerA company is running a critical application on an Amazon EC2 instance and requires persistent, low-latency block storage that can survive instance restarts. Which storage option should they choose?
- A
Amazon Elastic Block Store (Amazon EBS)
- B
Instance Store
- C
Amazon Simple Storage Service (Amazon S3)
- D
Amazon Elastic File System (Amazon EFS)
Show answer and explanation
Correct answer: A
Explanation
Amazon EBS is the correct choice because it provides persistent block storage that is specifically designed for use with EC2 instances and retains data even after the instance is stopped or restarted. Instance Store, while fast, is ephemeral and unsuitable for persistent storage needs. S3 and EFS are not block storage solutions and do not meet the application's requirements for low-latency block storage.
- A. Correct.
Amazon Elastic Block Store (Amazon EBS) is a persistent block storage solution designed for use with Amazon EC2 instances. It retains data even after the instance stops or restarts, making it suitable for critical applications.
- B. Incorrect.
Instance Store is ephemeral storage that is physically attached to the host server and does not persist data after the instance is stopped or terminated. It is not suitable for applications requiring persistent storage.
- C. Incorrect.
Amazon Simple Storage Service (Amazon S3) is an object storage service, not a block storage service, and is better suited for unstructured data like backups or media files. It does not meet the requirements for low-latency block storage.
- D. Incorrect.
Amazon Elastic File System (Amazon EFS) is a scalable file storage service for use with AWS Cloud services and on-premises resources. It is not a block storage solution and is better suited for shared file-based workloads.