EC2

Question 1

What is AMI?

Answer 1

Amazon Machine Image

An image / template that contains the OS you want for an EC2 instance

Question 2

There are 4 kinds of AMI, what are they?

Answer 2

Amazon Quick Start AMI

AWS Marketplace AMI

Community AMI

Private AMI

Question 3

What is an Amazoin Quick Start AMI?

Answer 3

Popular OS templates

Linux & Windows

Up to date

Officially supported

Question 4

What is an AWS Marketplace AMI?

Answer 4

AMI provided by industry vendors like SAP and Cisco

Question 5

What is a community AMI?

Answer 5

AMI created and maintained by people, independent vendors

Question 6

What is a private AMI and what is one potential use case?

Answer 6

An AMI created from your own instance deployment

Have own tested, patched instance

Used for auto scaling potentially

Could be imported from an on-prem VM that you want to move to cloud

Question 7

If you create a private AMI in a region, will it be available in another AWS region?

Answer 7

No

Question 8

What are the 5 EC2 instance types?

Answer 8

1. General Purpose
2. Compute Optimized
3. Memory Optimized
4. Accelerated Computing
5. Storage Optimized

Question 9

T2, T3, M4 & M5 are all EC2 instances of which type?

Answer 9

General Purpose

Question 10

T2 EC2 general purpose images are burstable. What does this mean?

Answer 10

Accumulate CPU credits in time of low utilization and can be applied during high demand periods

Question 11

If you have demanding web servers or high end machine learning workflows, what EC2 instance type would you choose?

Answer 11

Compute Optimized

Question 12

If you have intensive database, data analysis or caching operation then what type of EC2 instance type would you choose?

Answer 12

Memory Optimized

Question 13

C4 and C5 are example of which type of EC2 instance?

Answer 13

Compute Optimized

Question 14

X1, X1e and R4 are EC2 types of which instance family?

Answer 14

Memory Optimized

Question 15

If you have a very demading workload like 3D visualisation or financial analysis then which instance type family would you choose?

Answer 15

Accelerated Computing

Question 16

P3, P2, G3 & F1 are types from which instance family?

Answer 16

Accelerated Computing

Question 17

H1, I3 and D2 are types from which instance family?

Answer 17

Storage Optimized

Question 18

What does tenancy mean in relation to EC2?

Answer 18

Shared Tenancy - default, instance runs on shared hardware

Dedicated Tenancy - dedicated hardware for EC2 instance, a lot more expensive

Question 19

What is bootstrapping in EC2?

Answer 19

Execute commands on instance as it boots

Could be simple commands to install web server or a lot more complex

Question 20

What are placement groups and what are the 3 types?

Answer 20

Spread EC2 instances accross AWS infrastructure that is optimal for your use case

Cluster Groups

Spread Groups

Partition Groups

Question 21

What is an EC2 Cluster placement group?

Answer 21

Each instance in group launched within same availability zone and close proximity physically

Good for low latency

Question 22

What is an EC2 Spread placement group?

Answer 22

Seperate instance physically accross disctinct hardware even different availability zones

Similar to VMWare DRS

Can’t tolerate physical failure bringing down multiple instances

Question 23

What is an EC2 Partition placement group?

Answer 23

Associate some instances with each other, placing them in a single partition

Physical seperation from other instances running in other partitions

Question 24

What is the difference between a spread placement group and a partition placement group?

Answer 24

Spread group separates all instances accross different hardware

Partition group means instances in the group can run on the same hardware but other placements groups will run on other hardware