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AWS Associate Solutions Architect Exam > EC2 Instance Storage > Flashcards

EC2 Instance Storage Flashcards

1
Q

What is an EBS Volume?

A

Network drive that can be attached to a single EC2 instance

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2
Q

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

A

One

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3
Q

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

A

One

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4
Q

What is an advantage of using EBS volumes?

A

Allows data to persist even after instance has been terminated

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5
Q

What is an EBS Snapshot?

A

EBS Volume backup

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6
Q

What is an advantage of using an EBS Snapshot?

A

Snapshots can be copied to different Availability Zones and regions

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7
Q

What is an AMI (AWS Machine Image)?

A

Customized EC2 instance configuration

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8
Q

What are the advantages of using an AMI?

A

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

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9
Q

What are the types of AMIs in AWS?

A

Public
Personal
AWS marketplace

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10
Q

What is an EC2 Instance Store?

A

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

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11
Q

Why use an Instance Store?

A

For better I/O Performance

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12
Q

Instance Store use cases?

A

Caching

Temporary/scratch data

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13
Q

What are the disadvantages to using an Instance Store?

A

risk of data loss when hardware fails

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14
Q

List the EBS Volumes Types

A

gp2 and gp3
io1 and io2
st1
sc1

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15
Q

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

A

gp2 and gp3

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16
Q

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

A

io1 and io2

17
Q

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

A

st1

18
Q

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

A

sc1

19
Q

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

A

Provisioned IOPS SSD

20
Q

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

A

io1 / io2

21
Q

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

A

sc1

22
Q

Which volume types are HDD?

A

st1 and sc1

23
Q

Which volume types are SSD?

A

gp2 and gp3

io1 and io2

24
Q

Which volumes are cost effective and have low-latency?

A

gp2 and gp3

25
Q

Which volumes are high performing and have low-latency?

A

io1 and io2

26
Q

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

A

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

27
Q

What is an advantage of using an EBS RAID?

A

Increased IOPS performance

28
Q

What are the two main EBS RAID options?

A

RAID 0 and RAID 1

29
Q

What is one disadvantage from using RAID 0?

A

If one disk fails all of the data is lost

30
Q

What is one advantage from using RAID 1?

A

If one disk fails the logical volume is still working

31
Q

What is a characteristic from using RAID 0?

A

Data is written to each volume subsequently

32
Q

What is a characteristic from using RAID 1?

A

Data is written to each EBS volume at the same time

33
Q

What is one disadvantage from using RAID 1?

A

More network is needed if more than one volume is used

34
Q

What is EFS?

A

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

35
Q

What is an advantage of using EFS?

A

Highly available, scalable and “pay for what you use”

36
Q

What is an disadvantage of using EFS?

A

It’s expensive

37
Q

What applications types are advantageous for EFS?

A

CMS, wordpress, data sharing etc.

38
Q

How is access controlled for an EFS?

A

Security group

39
Q

What AMI’s are compatible with EFS?

A

Linux

AWS Associate Solutions Architect Exam (4 decks)

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