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AWS Exam Study > EC2 Instance Storage > Flashcards

EC2 Instance Storage Flashcards

1
Q

What does EBS stand for?

A

Elastic Block Store

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2
Q

A network drive you can attach to your instances while they run

A

EBS Volume

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3
Q

What is the EBS Volume’s purpose?

A

It allows your instance to persist data, even after termination

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4
Q

How many instances can a EBS Volume be mounted to at a time?

A

One

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5
Q

Are EBS volume’s bounded to specific AZ?

A

Yes

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6
Q

How should you think of an EBS Volume?

A

A network USB stick

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7
Q

Are EBS volume’s a physical or network drive?

A

Network drive

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8
Q

How can you move an EBS Volume across AZ?

A

Snapshot it

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9
Q

How would you preserve a root volume when an instance is terminated?

A

Disable delete on termination

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10
Q

A point-in-time copy of your data, and can be used to enable disaster recovery, migrate data across regions and accounts, and improve backup compliance.

A

EBS Snapshots

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11
Q

Is it necessary for you to detach a volume to do a snapshot?

A

No but it is recommended

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12
Q

You can copy snapshots across what? (2)

A

AZ or Region

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13
Q

What powers an EC2 instance?

A

An AMI

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14
Q

What does AMI stand for?

A

Amazon Machine Image

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15
Q

What are AMIs?

A

A customisation of an EC2 instance

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16
Q

Name three types of AMIs.

A
  • Public AMI
  • Your Own AMI
  • AWS Marketplace AMI
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17
Q

If you need a high-performance hardware disk, what should you use?

A

EC2 Instance Store

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18
Q

If you do use an EC2 Instance Store what is your responsibility?

A

Backups and replication

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19
Q

What are the downsides of using EC2 Instance Store?

A
  • If EC2 Instance Store is stopped it’ll lose its storage (ephemeral)
  • Risk of data loss if hardware fails
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20
Q

What is EC2 Instance good for?

A
  • Better I/O performance

* Buffer/cache/scratch data/temporary content

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21
Q

The place where your browser stores images, code, and other files to avoid re-downloading them repeatedly.

A

Cache

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22
Q

Name 6 types of EBS Volumes

A

gp2/gp3 (SSD)
io1/io2 (SSD)
st1 (HDD)
sc1 (HDD)

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23
Q

Cost effective storage & low latency

What EBS Volume type is this?

A

gp2/gp3

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24
Q

Independently set the IOPS and throughput

A

gp3 (newer version)

25
Q

IOPS & throughput are linked together

A

gp2 (older version)

26
Q
  • Critical business applications with sustained IOPS performance
  • For applications that need more than 16,000 IOPS
  • Great for databases workloads

Which EBS Volume type is this?

A

io1/io2

27
Q

io2 has more (blank) and more (blank)

A

Durability and IOPS per GiB

28
Q

Sub-millisecond latency

What EBS Volume type is this?

A

io2 Block Express

29
Q

If you want over 32,000 IOPS what do you need?

A

EC2 Nitro io1/io2

30
Q
  • Big data
  • Data warehouses
  • Log processing

What EBS volume type is this?

A

st1

31
Q

Throughput-oriented storage for data that is infrequently accessed

What EBS volume type is this?

A

sc1

32
Q

What is EBS Multi Attach?

A

Attach the same EBS volume
to multiple EC2 instances
in the same AZ

33
Q
  • Achieve higher application availability in clustered Linux applications (Ex.Teradata)
  • Applications must manage concurrent write operations
  • Must use a file system that’s cluster-aware
A

EBS Multi-Attach - io1/io2 family

34
Q

What are read permissions?

A

You can view the contents of a file

35
Q

What are write permissions?

A

You can modify the contents of a file

i.e add new content or delete existing content

36
Q

What type of impact does encryption have on latency?

A

Minimal

37
Q

EBS Encryption leverages keys from where?

A

KMS (AES-256)

38
Q

Snapshots of encrypted volumes are what?

A

Encrypted

39
Q

Copying an unencrypted snapshot allows what?

A

Encryption

40
Q

What does AES stand for?

A

Advanced Encryption Standard

41
Q

A symmetrical block cipher (code) used by the American government to encrypt sensitive data

A

AES

42
Q

Used by individuals and corporations alike to lock away classified or otherwise valuable information.

A

AES

43
Q

What does KMS stand for?

A

Key Management Service

44
Q
  1. Create an EBS snapshot of the volume
  2. Encrypt the EBS snapshot
  3. Create new EBS volume from the snapshot
  4. Attach the encrypted volume to the original instance.

What is this process called?

A

Encrypting an unencrypted EBS volume

45
Q

What does EFS stand for?

A

Elastic File System

46
Q

Managed NFS (network file system) that can be mounted on many EC2 instances

A

EFS

47
Q

EFS works with EC2 instances in multi or single AZ?

A

Multi

48
Q

EFS only works with what type of AMI?

A

Linux based AMI

49
Q

(Blank) is for a network file system to be mounted across multiple instances

A

EFS

50
Q

(Blank) is for a network volume that’s to be mounted only on one instance and it’s locked to one AZ

A

EBS

51
Q

(Blank) is to get the maximum amount of IO onto an EC2 instance but it is something you’ll lose if you lose that instance (ephemeral drive)

A

Instance Store

52
Q

Which is more expensive EFS or EBS?

A

EFS

53
Q

EFS-IA (infrequent access) does what?

A

Enhances cost savings

54
Q

How would you migrate EBS Volume to a different AZ?

A

EBS Snapshots

55
Q

Which is deleted by default, the Root Volume type or the EBS Volume type?

A

Root Volume Type

56
Q

(Blank) are built for specific AWS Region

A

AMIs

57
Q

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

A

gp2/gp3

io1/io2

58
Q

What storage mechanism provides the best disk I/O performance?

A

EC2 Instance Store

59
Q

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

A

Use an EC2 Instance Store

AWS Exam Study (15 decks)

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