EC2

Question 1

How many pricing models there is in EC2

Answer 1

4 ! On demand, Sport, Reserved, Dedicated Host

Question 2

What happen cost wise if I terminate my EC2 spot instance after 2,30 hours

Answer 2

I will pay for 3 hours

Question 3

What happen cost wise if Amazon terminate my EC2 spot instance after 2,30 hours

Answer 3

I will pay for 2 hours

Question 4

What’s the acronyme to remember the different EC2 Instance Types

Answer 4

DR MC GIFT PX

Question 5

What EC2 D2 mean and what’s use case ?

Answer 5

Dense storage - Usage : Fileservers/Data Warehousing/Hadoop

Question 6

What EC2 R4 mean and what’s use case ?

Answer 6

(RAM) Memory optimised - Usage : Memoy Intensive Apps/DBs

Question 7

What EC2 M4 mean and what’s use case ?

Answer 7

(Main) General Purpose - Usage : Applications servers

Question 8

What EC2 C4 mean and what’s use case ?

Answer 8

Compute Optimized - Usage : CPU Intensive Apps/DBs

Question 9

What EC2 G2 mean and what’s use case ?

Answer 9

Graphique Intensive - Usage : Video Encoding/ 3D Application Streaming

Question 10

What EC2 I2 mean and what’s use case ?

Answer 10

(Io) High Speed storage - Usage : NoSql, DBs, Data whareousing

Question 11

What EC2 M4 mean and what’s use case ?

Answer 11

(Main) General Purpose - Usage : Applications servers

Question 12

What EC2 T2 mean and what’s use case ?

Answer 12

Lowest Code - Usage : General purpose

Question 13

What EC2 P2 mean and what’s use case ?

Answer 13

Graphics - General purpose - Usage : Machine learning, Bitcoin Mining etc

Question 14

What EC2 X1 mean and what’s use case ?

Answer 14

Memory Optimise - Usage : SAP HANA, Apache Spart etc

Question 15

What EC2 T2 mean and what’s use case ?

Answer 15

Lowest Code - Usage : General purpose - (Good for dev, M4 would be use for production).

Question 16

What EC2 X1 mean and what’s use case ?

Answer 16

(Xtreme RAM) Memory Optimise - Usage : SAP HANA, Apache Spart etc

Question 17

What EC2 X1 mean and what’s use case ?

Answer 17

(Xtreme RAM) Memory Optimise - Usage : SAP HANA, Apache Spart etc

Question 18

What EBS mean , what it is ?

Answer 18

Amazon Elastic Block Store (Amazon EBS) provides persistent block storage volumes for use with Amazon EC2 instances in the AWS Cloud. Each Amazon EBS volume is automatically replicated within its Availability Zone to protect you from component failure, offering high availability and durability.

Question 19

How many different EBS type there is ? What are they ?

Answer 19

5 - SSD GP2 - SSD IOPS - HDD ST1 - HDD COLD SC1 - HDD Magnetic Standard.

Question 20

What is EBS SSD GP2

Answer 20

General purpose SSD

Question 21

What is EBS SSD IOPS IO1

Answer 21

High IOperation

Question 22

WHat is EBS HDD ST1

Answer 22

Classic HDD Frequently accessed workload (cannot be bootable)

Question 23

What is HDD Cold SC1

Answer 23

Less frequently accessed data (cannot be bootable)

Question 24

What is HDD Magnetic

Answer 24

Standanrd HDD cheap, infrequent access (can be bootable)

Question 25

Can EBS mount on different EC2 ?

Answer 25

No, Use EFS for this (Elastic File System)

Question 26

Can EBS mount on different EC2 ?

Answer 26

No, Use EFS for this (Elastic File System)

Question 27

By default is termination Protection on EC2 enable ?

Answer 27

No, need to enable it manually

Question 28

By defaut what happen when terminating EC2 with the root EBS Volume ?

Answer 28

By default the root EBS volume will be deleted

Question 29

Can Root volume can be encrypted ?

Answer 29

No except if using third party tool, but other EBS not (root) can be encrypted.

Question 30

Where a EBS Snapshot is stored ?

Answer 30

S3

Question 31

Are EBS Snapshot incremental ?

Answer 31

Yes

Question 32

Are snapshot of EBS encrypted volume encrypted ?

Answer 32

Yes

Question 33

Restore volume form encrypted snapshot is encrypted ?

Answer 33

yes

Question 34

Can you share an encrypted snapshot ?

Answer 34

No

Question 35

Where can you share a snapshot ?

Answer 35

Amazon Public Market place or other amazon account

Question 36

Do you need to stop instance to take snapshot of root volume ?

Answer 36

Yes

Question 37

What is Instance Store Volume ?

Answer 37

Call Ephemeral Storage, an instance store volume cannot be stop, if the host (baremetal) fail, data will be lost.

Question 38

How to take a snapshot of a RAID Array ?

Answer 38

Stop Application from writing to disk and flush cache to the disk. Three way to do 1-Freeze file system, 2-Unmout RAID Array, 3-Shutting down EC2 instance

Question 39

What is AMI

Answer 39

Amazon Machine Image

Question 40

What the AMI context

Answer 40

regional, can launch only with the region where it's stored, but can be copy crossed region.

Question 41

What the default time of monitoring from cloud watch

Answer 41

5 m

Question 42

What happen if I enable EC2 cloud watch detail monitoring

Answer 42

Monitoring time go down to 1 mn but is paid service

Question 43

What Cloud watch is monitoring

Answer 43

Ressources and performance only

Question 44

What is the difference between Cloud Watch and Cloud Trail ?

Answer 44

Cloud Trail is to monitor AWS activities while Cloud watch is to watch EC2 ressources and performance.

Question 45

How can you add extra ressources watcher for RAM for exemple with cloud watch ?

Answer 45

Need to install a special deamon on EC2 instance.

Question 46

What is an Alarm with Cloud watch

Answer 46

Use to notify when a threshold is hit

Question 47

What is an Event with cloud watch

Answer 47

An event can be use to respond to a state change in AWS ressources

Question 48

What is a Role in AWS ?

Answer 48

n IAM role is similar to a user, in that it is an AWS identity with permission policies that determine what the identity can and cannot do in AWS. However, instead of being uniquely associated with one person, a role is intended to be assumable by anyone who needs it. Also, a role does not have standard long-term credentials (password or access keys) associated with it. Instead, if a user assumes a role, temporary security credentials are created dynamically and provided to the user.

Question 49

Can a role be assign after an EC2 instance After it has been provisionning ?

Answer 49

Yes. (before cannot).

Question 50

Can a role being update anytime ?

Answer 50

Yes

Question 51

What is a context of a IAM Role ?

Answer 51

Global

Question 52

How to fetch Instance Metadata ?

Answer 52

Curl the IP http://169.254.169.254/latest/meta-data

Question 53

What is EFS ?

Answer 53

Elastic File System

Question 54

How pricing of EFS working ?

Answer 54

Pay for the usage storage

Question 55

What the maximum size of EFS

Answer 55

Up to Petabytes

Question 56

What EFS protocol is supported ?

Answer 56

Network File System Version 4 (NFSv4)

Question 57

How many concurent NFS an EFS can handle ?

Answer 57

thousand concurent connection

Question 58

What the context of the data storage of EFS ?

Answer 58

Availalbe in region only bu in all the Availibity zone of that region

Question 59

What model EFS is based on data constistency ?

Answer 59

Read After Write (same as S3)

Question 60

What is Lambda ?

Answer 60

AWS Lambda is an event-driven, serverless computing platform provided by Amazon as a part of the Amazon Web Services. It is a compute service that runs code in response to events and automatically manages the compute resources required by that code.

Question 61

What is the list on compatible event to trigg lambda (20) ?

Answer 61

``` Amazon S3 Amazon DynamoDB Amazon Kinesis Streams Amazon Simple Notification Service Amazon Simple Email Service Amazon Cognito AWS CloudFormation Amazon CloudWatch Logs Amazon CloudWatch Events AWS CodeCommit Scheduled Events (powered by Amazon CloudWatch Events) AWS Config Amazon Alexa Amazon Lex Amazon API Gateway AWS IoT Button Amazon CloudFront Amazon Kinesis Firehose ```

Question 62

Can I move a reserved instance from one region to another?

Answer 62

No

Question 63

Reserved instances are available for multi-AZ deployments ?

Answer 63

True

Question 64

If an Amazon EBS volume is an additional partition (ie not the root volume) , can I detach it without stopping the instance?

Answer 64

Yes but it will take some times

Question 65

What is mandatory for cloudformation template ?

Answer 65

Ressources (specify the stack ressources and their properties)

Question 66

What service is used to import existing VM into AWS ?

Answer 66

VM import/export

Question 67

What the URL format for a static website service made on S3 ?

Answer 67

.s3-website-.amazonaws.com/

Question 68

What kind of AMI image is needed to launch a T2.medium instance ?

Answer 68

An Amazon EBS-Backed Hardware Virtual Machine AMI.