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AWS Certified Solutions Architect Associate > Elastic Block Storage (EBS) and Elastic File System (EFS) > Flashcards

Elastic Block Storage (EBS) and Elastic File System (EFS) Flashcards

1
Q

Snapshots are incremental. What does this mean?

A

They only store the data that has changed since the last snapshot.

This makes the snapshot process more efficient and reduces storage costs.

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2
Q

TRUE or FALSE?
Snapshots can be taken for both the root volume (where the operating system is installed) and any additional attached EBS volumes.

A

TRUE
However, the root volume must be an EBS volume to create a snapshot.

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3
Q

How many AZs are EBS volumes replicated over?

A

1

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4
Q

TRUE or FALSE?
You can increase capacity and change the EBS volume type with no downtime.

A

TRUE

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5
Q

What EBS volume types are there?

A

General purpose SSD (gp2 & gp3)
Provisioned IOPS SSD (io1& io2)
Throughput Optimized HDD
Cold HDD

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6
Q

What are 2 use cases for gp2 volumes?

A

Boot volumes
Dev and test applications that aren’t latency sensitive

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7
Q

What’s the default volume you would use when provisioning an EC2 instance?

A

EBS gp2 or gp3

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8
Q

What’s the pricing difference between io1 and io2?

A

They are the same.

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9
Q

In the exam, when you hear anything to do with:
Big data
Data warehouses
ELT
Log processing

think of…

A

EBS Throughput Optimized

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10
Q

What are Throughput Optimized HDDs used for?

A

A cost-effective way to store mountains of data.

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11
Q

TRUE or FALSE?
Throughput Optimized HDDs can be used as a boot volume.

A

FALSE

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12
Q

What is the lowest cost EBS volume?

A

Cold HDD (SC1)

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13
Q

What is Cold HDD good for?

A
  • Data requiring fewer scans per day
  • Applications where performance is not a factor
  • When you need the lowest cost
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14
Q

For a transactional database, would you use IOPS or Throughput?

A

IOPS

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15
Q

TRUE or FALSE?
You can reboot both EBS and Instance Store Volumes and you won’t lose your data.

A

TRUE

However Instance Store Volumes cannot be stopped.

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16
Q

TRUE or FALSE?
By default, root volumes are not deleted on termination.

A

FALSE

Both EBS and Instance store volumes are deleted on termination. However with EBS you can specify to keep the root device volume.

17
Q

TRUE or FALSE?
With encrypted volumes, all snapshots are encrypted, as well as volumes created from the snapshots.

A

TRUE

18
Q

TRUE or FALSE?
With encrypted volumes, the data at rest is encrypted, but not data in flight between the instance and the volume.

A

FALSE

Data in flight is also encrypted.

19
Q

What are the 4 steps to encrypt volumes?

A
  • Create a snapshot of the unencrypted root device volume.
  • Create a copy of the snapshot and select the encrypt option.
  • Create an AMI from the encrypted snapshot.
  • Use that AMI to launch new encrypted instances.
20
Q

What’s the maximum amount of time an EC2 instance can be hibernated for?

A

60 days

21
Q

What can you use to automate the creation, retention, and deletion of EBS snapshots?

A

Amazon Data Lifecycle Manager (DLM)

22
Q

TRUE or FALSE?
EBS multi-attach means you can attach the volume to multiple instances in different AZs.

A

FALSE

Only within one AZ.

23
Q

TRUE or FALSE?
EFS works with instances in multiple AZs.

A

TRUE

24
Q

What is more expensive? EBS or EFS?

A

EFS

25
Q

Which operating systems is EFS compatible with?

A

Only Linux, not Windows

26
Q

How do you scale EFS?

A

It scales automatically

27
Q

What is the pricing model of EFS?

A

Pay per use
(Expensive)

28
Q

What are the two EFS storage tiers?

A

Standard
Infrequently Accessed

29
Q

TRUE or FALSE?
You can pre-provision storage with EFS.

A

FALSE
It scales automatically and is pay per use, so no pre-provisioning is required.

30
Q

How many connections can EFS support?

A

Thousands

31
Q

What is Amazon FSx for Lustre?

A

A fully managed file system optimized for compute-intensive workloads.

32
Q

What is a typical use case for Amazon FSx for Lustre?

A

AI or machine learning

33
Q

For questions that ask for centralized storage for SharePoint or Workspaces, think of…

A

Amazon FSx for Windows

34
Q

When you need high speed, high performance distributed storage, e.g. high performace computing (HPC) or financial modelling, think of…

A

Amazon FSx for Lustre

35
Q

What are the two performance modes of EFS?

A

General Purpose
Max I/O

36
Q

A Content Management System (CMS) is a typical use case for…

A

EFS

AWS Certified Solutions Architect Associate (22 decks)

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