AWS (Amazon Web Services) Certification Practice Exam

How is data persisted in Elastic Block Store (EBS)?

1. Data is stored temporarily for immediate processes

2. Data is persisted on the instance storage only

3. Data is stored on external volumes linked to EC2

4. Data is replicated across multiple regions

The correct answer is: Data is stored on external volumes linked to EC2

Data is persisted in Elastic Block Store (EBS) through the use of external volumes that are linked to Amazon Elastic Compute Cloud (EC2) instances. EBS provides block-level storage, which means that the data is stored as blocks rather than as files or objects. When you create an EBS volume, it can be attached to an EC2 instance, allowing the instance to read from and write to the volume as if it were a local disk. This makes EBS an essential service for applications that require reliable, low-latency storage. By utilizing external volumes, EBS ensures that the data is decoupled from any specific EC2 instance. This decoupling allows for enhanced flexibility, enabling you to detach an EBS volume from one instance and attach it to another, without data loss. Moreover, the data stored in EBS persists beyond the lifespan of the instance; if an instance is stopped or terminated, the data on the EBS volume remains intact and available for future use. While the other options present differing notions of data storage, they do not accurately represent the functionality of EBS. For instance, stating that data is stored temporarily for immediate processes does not capture the nature of EBS as a persistent storage solution. Additionally