EC2 Instance Storage

Question 1

Which EC2 Storage would you use to create a shared network file system for your EC2 Instances?

a) EBS Volume
b) EC2 Instance Store
c) EBS Snapshots
d) EFS

Answer 1

d) EFS

Amazon EFS is a fully managed service that makes it easy to set up, scale, and cost-optimize file storage in the Amazon Cloud.

Question 2

What are AMIs NOT used for?

a) Add your own software license
b) Add your own configuration
c) Add your own operating system
d) Add your own IP address

Answer 2

d) Add your own IP address

You cannot use AMIs to add your IP addresses. IP addresses are added to an instance as you create it.

Question 3

EBS Volumes CANNOT be attached to multiple EC2 instances at a time.

True or False

Answer 3

True

EBS Volumes can be attached to only one EC2 Instance at a time, but EC2 Instances can have multiple EBS Volumes attached to them.

Question 4

An EBS Volume is a network drive you can attach to your instances while they run, so your instances’ data persist even after their termination.

True or False

Answer 4

True

EBS Volumes allows instances’ data to persist even after their termination.

Question 5

Which statement is CORRECT regarding EC2 Instance Store?

a) It is not good to use as a disk to cache content
b) It has better I/O performance, but the data is lost if the EC2 instance is terminated
c) Your data is always safe with EC2 instance store

Answer 5

b) It has better I/O performance, but the data is lost if the EC2 instance is terminated

EC2 Instance Store has better I/O performance, but data is lost if: the EC2 instance is stopped or terminated, or when the underlying disk drive fails.

Question 6

What is an EBS Snapshot?

a) The operating-system on an EC2 Instance
b) A backup of your EBS Volume at a point in time
c) The amount of CPU and RAM of an EC2 Instance

Answer 6

b) A backup of your EBS Volume at a point in time

EBS Snapshots are used to backup data on your EBS Volumes at a point in time.

Question 7

Where can you find a third party’s AMI so you can use it to launch your EC2 Instance?

a) Public AMIs
b) My own AMIs
c) AWS Marketplace AMIs

Answer 7

c) AWS Marketplace AMIs

You can use AWS Marketplace AMIs to use someone else’s AMI.

Question 8

What is an EBS Volume tied to?

a) A region
b) A data center
c) An edge location
d) An availability zone

Answer 8

d) An availability zone

EBS Volumes are tied to only one availability zone.

Question 9

Are AMIs built for a specific region?

True or False

Answer 9

True

AMIs are built for a specific region but also can be copied across regions.

Question 10

What is an EC2 Instance Store and why would you used it?

Answer 10

An EC2 Instance Store is a high-performace hardware disk (a real one attached to an EC2) because it has better I/O performance.

As this EC2 lose its data when the EC2 instance is stopped or terminated it could be only used as a buffer, a cache, for scratched data or temporary content.

There is always a riks of lossing data if hardware fails, so the backups and replication are fully customer’s responsibility.

Question 11

Is it possible to use EFS for Windows EC2 instances?

Answer 11

NO,

EFS only works on Linux instances in an multi-AZ also.