AWS Cloud Practitioner Questions | EC2 Instance Storage

📌 Notice

This is a Quiz accompanying the blog post:

“Pass the AWS Certified Solutions Architect Associate Certification SAA-C03-(Episode 6: EC2 Instance Storage)”

🔹 Focus: AWS Cloud Practitioner Preparation Quiz

🔹 For theoretical concepts and exam-style questions, please refer to the main blog post.

Question 1

You have just terminated an EC2 instance in us-east-1a, and its attached EBS volume is now available. Your teammate tries to attach it to an EC2 instance in us-east-1b but he can't. What is a possible cause for this?

Correct Answer : (3) EBS volumes are indeed created for a specific Availability Zone (AZ). This means that an EBS volume from one AZ cannot be directly attached to an EC2 instance in another AZ, which explains why your teammate couldn’t attach it in us-east-1b.

Question 2

You have launched an EC2 instance with two EBS volumes, Root volume type and the other EBS volume type to store the data. A month later you are planning to terminate the EC2 instance. What’s the default behavior that will happen to each EBS volume?

Correct Answer: (2) The root volume is set to delete automatically when the instance is terminated, while other EBS volumes do not have this setting enabled by default. This means that only the root volume will be deleted, leaving your additional data volume intact for further use.

Question 3:

You can use an AMI in N.Virginia Region us-east-1 to launch an EC2 instance in any AWS Region.

Correct Answer: (2) Amazon Machine Images (AMIs) are region-specific, meaning each AMI is unique to its respective AWS region. Therefore, you cannot use an AMI from the Northern Virginia region (us-east-1) to launch an EC2 instance in any other region directly. Instead, you would need to copy the AMI to the target region before launching an instance from it.

Question 4:

Which of the following EBS volume types can be used as boot volumes when you create EC2 instances?

Correct Answer: (2) gp2, gp3, io1, and io2 are the EBS volume types that can be utilized as boot volumes for EC2 instances, allowing them to store the operating system and other essential files necessary for instance startup.

Question 5:

What is EBS Multi-Attach?

Correct Answer: (3) EBS Multi-Attach allows the same EBS volume to be simultaneously attached to multiple EC2 instances within the same Availability Zone, providing those instances with full read/write access to the volume. This capability is particularly useful for applications requiring shared access to storage.

Question 6:

You would like to encrypt an unencrypted EBS volume attached to your EC2 instance. What should you do?

Correct Answer: (1) Creating a snapshot of your unencrypted EBS volume allows you to secure a copy of your data, and by copying it with encryption enabled, you ensure that the new volume will be encrypted, thus enhancing data security. This process is a standard method to encrypt existing unencrypted volumes without data loss.

Question 7:

You have a fleet of EC2 instances distributes across AZs that process a large data set. What do you recommend to make the same data to be accessible as an NFS drive to all of your EC2 instances?

Correct Answer : (2) EFS (Elastic File System) allows multiple EC2 instances across different Availability Zones to access the same file system simultaneously, which is essential for your fleet processing a large dataset. This capability ensures seamless data sharing and collaboration among your instances, aligning with the objective of efficient data accessibility.

Question 8:

You would like to have a high-performance local cache for your application hosted on an EC2 instance. You don’t mind losing the cache upon the termination of your EC2 instance. Which storage mechanism do you recommend as a Solutions Architect?

Correct Answer : (3) It offers the highest performance for disk I/O among the storage options, making it ideal for caching data locally on your EC2 instance. This aligns perfectly with your application’s need for fast access to cached data, even if it’s lost upon instance termination.

Question 9:

You are running a high-performance database that requires an IOPS of 310,000 for its underlying storage. What do you recommend?

Correct Answer: (3) It provides the highest IOPS performance necessary for your high-performance database, allowing you to meet the requirement of 310,000 IOPS effectively, despite the trade-off of potential data loss upon instance termination. This choice aligns with the objective of optimizing performance in storage solutions for demanding applications like databases.

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