EC2 Volume Types

Question 1

What is the difference between instance volumes and EBS volumes?

Answer 1

Instance is ephemeral, EBS is persistant.

Question 2

What 2 types of volumes are there?

Answer 2

Root Volume (where the OS is installed)
Additional Volumes (D:\, E:\, F:\, or /dev/sdb, /dev/sdc, /dev/sdd, etc

Question 3

True or False: a root device can be either an EBS volume or an instance?

Answer 3

True

Question 4

What is the maximum volume size for an instance store?

Answer 4

10GB

Question 5

What is the maximum volume size for an EBS volume?

Answer 5

1 or 2Tb, depending on the OS

Question 6

Are root volumes deleted by default upon EC2 termination?

Answer 6

Yes.

Question 7

How do you prevent an EBS backed root volume from being deleted upon EC2 termination using the console?

Answer 7

unselect the “Delete on Termination” option upon instance creation.

Question 8

How do you prevent a root volume from being deleted upon EC2 termination using CLI?

Answer 8

Set the deleteontermination flag to false.

Question 9

True or false: Additional volume types (non-root) are preserved upon instance termination?

Answer 9

True

Question 10

True or false: Upon EC2 instance creation, you can prevent instance-store backed root volume from deletion upon EC2 termination?

Answer 10

False. Instance-store backed root volumes cannot modify the Delete on Termination configuration, and will be deleted upon EC2 termination.

Question 11

True or False: rebooting an instance results in the loss of instance store data?

Answer 11

False

Question 12

under what circumstances will data on an instance store be lost?

Answer 12

Failure of the underlying drive
Stopping the instance
terminating the instance

Question 13

True of false: It is best practice to not use instance store volumes for production data uses?

Answer 13

True. Use replication strategies, S3, or EBS volumes

Question 14

Can you upgrade an instance-store backed EC2 instance?

Answer 14

No. Since you cannot stop the instance, you cannot make modifications that require stopping the instance.

Question 15

Can you modify an EC2 instance’s Delete on Termination atrribute after the instance has been launched?

Answer 15

No, this must be set at launch.

Question 16

True or False: additional volumes delete automatically upon instance termination?

Answer 16

False. They persist after termination and must be deleted manually

Question 17

True or False: ECS instances and the EBS volume to be attached must be in the same AZ?

Answer 17

True.

Question 18

True or False: you can only change volume types of Standard (Magnetic) storage?

Answer 18

False: In fact, you change all volume types EXCEPT magnetic.

Question 19

Steps to duplicate an EBS volume in another AZ

Answer 19

1. Create a snapshot of the volume
2. Create a new volume from the snapshot.
3. Choose the desired AZ from the menu

Question 20

Steps to duplicate an EBS volume in another region

Answer 20

1. Create a snapshot of the volume

2. Copy the snapshot to the desired region

Question 21

Can you create an AMI image from an EBS snapshot?

Answer 21

Yes.

Question 22

What is an EBS volume?

Answer 22

Virtual hard disk

Question 23

Where are snapshots held?

Answer 23

S3.

Question 24

True or False: Snapshots are incremental?

Answer 24

True. Only blocks that have changed will be copied since the last snapshot.

Question 25

Is your first snapshot created immediately?

Answer 25

No. The first snapshot may take some time to create.

Question 26

When creating a snapshot of a root volume, should you stop the instance first?

Answer 26

Yes. If you don't, it can create latency

Question 27

Can you create a snapshot of the root volume while the instance is on?

Answer 27

Yes. However, it is best practice to stop the instance.

Question 28

True or False: Snapshots of encrypted volumes are encrypted automatically?

Answer 28

True

Question 29

True or false: Volumes restored from encrypted snapshots are encrypted automatically?

Answer 29

True

Question 30

True or False: Encrypted snapshots can be shared with the public, or other AWS accounts?

Answer 30

False. Snapshots must be decrypted to share.