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AWS - Certified Solutions Architect - Associate (SAA-C03) > EBS, EFS, FSx, and Instance stores > Flashcards

EBS, EFS, FSx, and Instance stores Flashcards

1
Q

What are EBS Volumes?

A

Elastic Block Store. Storage volumes you can attach to your EC2 instances. Essential a virtual hard disk.

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2
Q

What is a GP2 EBS volume good for?

A

For Boot volumes or development and test environments not latency sensitive.

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3
Q

What is IO2 EBS volumes good for?

A

If you have a high performance application such as large Databases

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4
Q

What is ST1 EBS Volume good for?

A

Frequently accessed and throughput intensive workloads. Such as big data, data warehouse, ETL, and log processing

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5
Q

Can an ST1 be used as a boot volume?

A

No

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6
Q

What is an SC1 EBS Volume good for?

A

For cold storage. Low cost low performance.

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7
Q

What is IOPS?

A

Measures the number of read and write operations per second.

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8
Q

What is Throughtput?

A

Measures the number of bits read or written per second

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9
Q

Which EBS volume is better for 16,000 IOPS or lower?

A

GP2 - General Purpose

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10
Q

Which EBS volume is better for over 16,000 IOPS?

A

IO2 - Provisioned IOPS

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11
Q

What is the lowest cost EBS Volume?

A

SC1 - Cold Storage

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12
Q

What is the root device volume?

A

The required EBS volume on an EC2 instance

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13
Q

What is an EBS Snapshot?

A

Point in time copy of a volume

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14
Q

What do you need to do to make sure an EBS Snapshot is consistent?

A

Stop the EC2 Instance since some things might still be in RAM

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15
Q

Does an Encrypted EBS Volumes snapshot become encrypted automatically?

A

Yes

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16
Q

Can you share an EBS snapshot across regions?

A

No - They will only be shared in the region it was created by default

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17
Q

Can you copy an EBS snapshot to another region?

A

Yes

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18
Q

Are EBS volumes in the same AZ as your EC2 Instance?

A

Yes

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19
Q

Can you resize EBS volumes while an EC2 instance is still running?

A

Yes

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20
Q

Can you switch EBS volume types while an EC2 instance is still running?

A

Yes

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21
Q

Where are EBS Snapshots stored?

A

S3

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22
Q

Are EBS Snapshots incremental?

A

Yes

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23
Q

Can you encrypt an EBS volume when you copy it if it was not encrypted before?

A

Yes

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24
Q

When encrypting an EBS volume. Is data at rest encrypted?

A

Yes

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25
Q

When encrypting an EBS volume. Is data in flight not encrypted?

A

No, its encrypted

26
Q

When encrypting an EBS volume, are the future snapshots encrypted?

A

Yes

27
Q

When making a volume from an EBS snapshot, where the EBS volume was encrypted, are the volumes encrypted?

A

Yes

28
Q

If you were just hired by a company and you found out their EC2 instances were not encrypted what would be the steps to encrypting them?

A

1) Create a snapshot of the unencrypted root device volume

2) Create a copy of the snapshot and select the encrypted option

3) Create an AMI from the Encrypted snapshot

4) Use that AMI to launch new encrypted instances.

29
Q

What is EC2 Hibernation?

A

A way to shut down your EC2 instance and preserve the RAM on its system by writing it to the EBS volume.

30
Q

Why would you use EC2 Hibernation?

A

Since it saves the contents of the RAM to disk then it boots up much faster and continues where the instance left off since you do not need to reload the operating system.

31
Q

Can you hibernate an instance with 150GB of RAM?

A

No, it has to be less than 150GB

32
Q

What EC2 instance families can you hibernate?

A

C, R, and M

33
Q

What operating systems can you perform an EC2 Hibernation on?

A

Windows, Amazon Linux 2, and Ubuntu

34
Q

What is the max time you can have an EC2 instance hibernated?

A

60 days

35
Q

Are on-demand and Reserved instances the only types you can hibernate?

A

Yes

36
Q

What is EFS?

A

Amazon Elastic File System. It is shared storage amongst multiple EC2 instances.

37
Q

What are some good use cases for EFS?

A

1) Content management, like a WP blog
2) Server farms

38
Q

Can EFS be used on Windows?

A

No, only Linux

39
Q

What Network File System does EFS support?

A

NFSv4

40
Q

Do you have to pre provision storage for EFS?

A

No, you only pay for what you use.

41
Q

Can EFS scale up to petabytes?

A

Yes

42
Q

True or False. EFS can not support thousands of concurrent connections.

A

False

43
Q

True or False. EFS Data is stored across multiple AZ’s within a region.

A

True

44
Q

True or False. EFS does not have read-after-write consistency.

A

False

45
Q

What would you use to have highly scalable shared storage using NFS?

A

EFS

46
Q

What is FSx for Windows?

A

Fully managed native Microsoft Windows file system

47
Q

If you have to migrate a Windows application on a shared file service what service would you use?

A

FSx for Windows

48
Q

What is Amazon FSx for Lustre?

A

A fully managed file system that is optimized for compute intensive workloads.

49
Q

What is Amazon FSx for Lustre used for mainly?

A

AI and Machine Learning

50
Q

Can Amazon FSx for Lustre store data directly to S3?

A

yes

51
Q

What are the two different AMI’s?

A

EBS and Instance store volumes

52
Q

What are instance store volumes sometimes called?

A

Ephemeral storage

53
Q

If an EC2 instance using instance store data is stopped what happens?

A

You lose your data

54
Q

If anything happens to an EC2 instance using Instance Store that causes it to stop what happens?

A

you lose your data

55
Q

Can you reboot an instance store volume and keep your data?

A

Yes

56
Q

What is AWS Backup?

A

A way of backing up the different AWS services.

57
Q

Can you use AWS Backup with Organizations?

A

Yes

58
Q

True or False? You can create an unencrypted EBS volume from an encrypted snapshot by unselecting the “encryption” check box when restoring it.

A

False

59
Q

True or False? EBS volumes are encrypted by default.

A

False

60
Q

True or False? Amazon Machine Images are Region specific. To use one in another Region, it needs to be explicitly copied there.

A

True

61
Q

Why would you consider hibernating an EC2 instance over stopping and starting it?

A

You have an application that takes a long time to load. Hibernating the instance prevents you from having to reload it.

AWS - Certified Solutions Architect - Associate (SAA-C03) (17 decks)

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