EC2 - Solutions Architect Associate Level

Question 1

Networking has two sorts of IPs.

What are they?

Answer 1

IPv4

IPv6

Question 2

Which network is the most common format used online?

Answer 2

IPv4

Question 3

Which network is newer and solves problems for the Internet of Things (IoT)?

Answer 3

IPv6

Question 4

How many different addresses does this network allow in the public space?

Answer 4

3.7 billion/IPv4

Question 5

If you need to have a fixed public IP for your instance, what do you need?

Answer 5

Elastic IP

Question 6

When you stop and start an EC2 instance, can it change its public IP?

Answer 6

Yes

Question 7

What is an Elastic IP?

Answer 7

A public IPv4 you own, as long as you don’t delete it

Question 8

How many instances can you attach an elastic IP to at a time?

Answer 8

One

Question 9

How many elastic IPs can be in your account at a time?

Answer 9

Five

Question 10

Why should you try avoid using elastic IP?

Answer 10

They often reflect poor architectural decisions

Question 11

What is the first thing you should try using before an Elastic IP?

Answer 11

A random IP and register a DNS name to it

Question 12

What is the second thing you should try using before an Elastic IP?

Answer 12

A Load Balancer and don’t use a public IP

Question 13

When do you use placement groups?

Answer 13

When you want control over the EC2 Instance placement strategy

Question 14

What are the 3 types of placement groups?

Answer 14

• Cluster
• Spread
• Partition

Question 15

• Same Rack Same AZ
• Low Latency
• 10Gbps bandwidth between instances
• If the rack fails, all instances fails at the same time

What placement group is this?

Answer 15

Cluster Placement Group

Question 16

A computer network that is optimized to process a very high volume of data messages with minimal delay.

Answer 16

Low Latency

Question 17

What does Gbps stand for?

Answer 17

Gigabits per second

Question 18

This is a Big Data job that needs to complete fast and an application that needs extremely low latency and high network throughput

What placement group should you use?

Answer 18

Cluster

Question 19

• Each EC2 instance is on a different hardware
• Can span across AZ
• Reduced risk of simultaneous failure because EC2 Instances are on different physical hardware
• Limited to 7 instances per AZ per placement group

Which placement group is this?

Answer 19

Spread Placement Group

Question 20

This application will need to maximize high availability and each instance must be isolated from failure from each other
Critical Applications

What placement group should you use?

Answer 20

Spread

Question 21

• Up to 7 per (blank) AZ
• Can span across multiple AZs in the same region
• Up to 100s of EC2 instances
• The instances in a (blank) do not share racks with the instances in the other (blank)
• A (blank) failure can affect many EC2 but won’t affect other (blank)
• EC2 instances get access to the (blank) information as metadata

What type of placement group is this?

Answer 21

Partition Placement Group

Question 22

Big Data applications such as HDFS, HBase, Cassandra & Kafka

What placement group should you use?

Answer 22

Partition

Question 23

What does IP stand for?

Answer 23

Internet Protocol

Question 24

What does GBps stand for?

Answer 24

Gigabytes per second

Question 25

What does DNS stand for?

Answer 25

Domain Name System

Question 26

A logical component in a Virtual Private Cloud that represents a virtual network card

Answer 26

Elastic Network Interface (ENI)

Question 27

The in-memory (RAM) state is preserved

Answer 27

EC2 Hibernate

Question 28

After EC2 Hibernate, the instance boot is what?

Answer 28

Much faster

Question 29

The EC2 Hibernate instance RAM size must be less than what?

Answer 29

150 GB

Question 30

How long can an instance be hibernated?

Answer 30

Up to 60 days

Question 31

What does RAM stand for?

Answer 31

Random Access Memory

Question 32

What is RAM?

Answer 32

The computer’s short term memory, which it uses to handle all active task and apps

Question 33

The more RAM a computing device has, the what?

Answer 33

Faster it runs

Question 34

What does OS stand for?

Answer 34

Operating system

Question 35

What is the most important type of system software in a computer system?

Answer 35

OS

Question 36

Without an OS what can’t a user do?

Answer 36

A user cannot run an application program on their computer

Question 37

EC2 Nitro is necessary for how many EBS IOPS?

Answer 37

64,000

Question 38

What does IOPS stand for?

Answer 38

Input/Output Operations Per Second

Question 39

What does IOPS do?

Answer 39

Measures server performance

Question 40

If you need a higher speed EBS volume | what should you use?

Answer 40

EC2 Nitro type of instance to leverage the increased level of IOPS

Question 41

EC2 instances comes with a combination of what?

Answer 41

RAM and vCPU

Question 42

What does vCPU stand for?

Answer 42

Virtual Centralised Processing Unit

Question 43

Represents a portion or share of the underlying, physical CPU that is assigned to a particular virtual machine (VM)

Answer 43

vCPU

Question 44

Can you optimise CPU options? | Licensing Cost

Answer 44

Yes

Question 45

What is EC2 Capacity Reservations?

Answer 45

It ensures you have EC2 Capacity when needed

Question 46

* Manual or planned end-date for the reservation * No need for 1 or 3 year commitment * Capacity access is immediate, you get billed as soon as it starts

Answer 46

EC2 Capacity Reservations

Question 47

By using Spot Block Instances, you reserve a set of Spot EC2 instances for how long?

Answer 47

1 to 6 hours without interruption

Question 48

Cluster Placement Groups place your EC2 instances next to each other which gives you what?

Answer 48

High performance computing (HPC) and networking

Question 49

ENIs are bounded to a what?

Answer 49

Specific AZ

Question 50

Can you attach an ENI to an EC2 instance in a different AZ? Why?

Answer 50

No because ENIs are bounded to a specific AZ

Question 51

To enable EC2 Hibernate, what must the EC2 Instance Root Volume be? And also what?

Answer 51

An EBS volume Encrypted to ensure the protection of sensitive content