EC2 Instance Storage

Question 1

What is an EBS Volume?

Answer 1

Network drive that can be attached to a single EC2 instance

Question 2

How many instances can an EBS volume be mounted to in a given time frame?

Answer 2

One

Question 3

How many availability zones can an EBS Volume be bound to?

Answer 3

One

Question 4

What is an advantage of using EBS volumes?

Answer 4

Allows data to persist even after instance has been terminated

Question 5

What is an EBS Snapshot?

Answer 5

EBS Volume backup

Question 6

What is an advantage of using an EBS Snapshot?

Answer 6

Snapshots can be copied to different Availability Zones and regions

Question 7

What is an AMI (AWS Machine Image)?

Answer 7

Customized EC2 instance configuration

Question 8

What are the advantages of using an AMI?

Answer 8

Faster boot time and can be used and copied across different availability zones and regions

Question 9

What are the types of AMIs in AWS?

Answer 9

Public
Personal
AWS marketplace

Question 10

What is an EC2 Instance Store?

Answer 10

High performance hardware disk that act as alternatives to EBS volumes for temporary data

Question 11

Why use an Instance Store?

Answer 11

For better I/O Performance

Question 12

Instance Store use cases?

Answer 12

Caching

Temporary/scratch data

Question 13

What are the disadvantages to using an Instance Store?

Answer 13

risk of data loss when hardware fails

Question 14

List the EBS Volumes Types

Answer 14

gp2 and gp3
io1 and io2
st1
sc1

Question 15

What volume(s) are the best for general purpose and balances price and performance for a wide variety of workloads?

Answer 15

gp2 and gp3

Question 16

What volume(s) are best for highest-performance mission-critical low-latency or high-throughput workloads?

Answer 16

io1 and io2

Question 17

What volume(s) are best for frequent accessed, throughput-intensive workloads?

Answer 17

st1

Question 18

What volume(s) are best for less frequently accessed workloads?

Answer 18

sc1

Question 19

What volume(s) are best for I/O-intensive database workloads?

Answer 19

Provisioned IOPS SSD

Question 20

What volume(s) can be attached to multiple instances?

Answer 20

io1 / io2

Question 21

Which type of HDD volume(s) are the lowest costing?

Answer 21

sc1

Question 22

Which volume types are HDD?

Answer 22

st1 and sc1

Question 23

Which volume types are SSD?

Answer 23

gp2 and gp3

io1 and io2

Question 24

Which volumes are cost effective and have low-latency?

Answer 24

gp2 and gp3

Question 25

Which volumes are high performing and have low-latency?

Answer 25

io1 and io2

Question 26

What is the difference between gp2 volume and a gp3 volume?

Answer 26

IOPS and throughput are linked together in gp2 volume whereas they are independently set in a gp3 volume

Question 27

What is an advantage of using an EBS RAID?

Answer 27

Increased IOPS performance

Question 28

What are the two main EBS RAID options?

Answer 28

RAID 0 and RAID 1

Question 29

What is one disadvantage from using RAID 0?

Answer 29

If one disk fails all of the data is lost

Question 30

What is one advantage from using RAID 1?

Answer 30

If one disk fails the logical volume is still working

Question 31

What is a characteristic from using RAID 0?

Answer 31

Data is written to each volume subsequently

Question 32

What is a characteristic from using RAID 1?

Answer 32

Data is written to each EBS volume at the same time

Question 33

What is one disadvantage from using RAID 1?

Answer 33

More network is needed if more than one volume is used

Question 34

What is EFS?

Answer 34

Elastic File System is a network file share that can be mounted on multiple EC2 instances

Question 35

What is an advantage of using EFS?

Answer 35

Highly available, scalable and "pay for what you use"

Question 36

What is an disadvantage of using EFS?

Answer 36

It's expensive

Question 37

What applications types are advantageous for EFS?

Answer 37

CMS, wordpress, data sharing etc.

Question 38

How is access controlled for an EFS?

Answer 38

Security group

Question 39

What AMI's are compatible with EFS?

Answer 39

Linux