EC2

Question 1

What does EC2 stand for, and what does it mean?

Answer 1

EC2 stands for Elastic Cloud Computing and it’s basically a virtual server in the cloud

Question 2

What are the 4 types of pricing models in EC2?

Answer 2

On-Demand
Reserved
Spot
Dedicated Hosts

Question 3

What’s the purpose of on-demand EC2?

Answer 3

Allows you to pay hourly or by the second without any commitments

Question 4

What’s the purpose of Reserved EC2?

Answer 4

It reserves (blocks) a server capacity that offers you a high discount, although you do need to sign a contract from 1 year up to 2 years

Question 5

What’s the Spot Ec2 pricing?

Answer 5

It’s an instance that you bid on the price.

Question 6

What are the downsides of EC2 spot pricing?

Answer 6

Amazon can terminate the instance whenever it feels necessary but you will not be charged by the partial hour of usage

Question 7

What’s the occasion when an EC2 Spot is terminated that the client needs to pay for any partial hourly usage?

Answer 7

When the client itself terminate an instance

Question 8

What are Dedicated-Server hosts?

Answer 8

Physical EC2 instances dedicated for your usage (isolated at hardware level). It can help you remove costs by allowing you to use your own software licenses.

Question 9

To whom it’s recommended the Spot Pricing model of EC2?

Answer 9

1. Applications that are feasible with low compute needs
2. Applications that have flexible end-start times
3. Users with very urgent compute needs

Question 10

To whom it’s recommended the Dedicated Pricing model of EC2?

Answer 10

1. Regulatory requirements that don’t allow multi-tenancy virtualization
2. Great for licensing which doesn’t support multi-tenancy or cloud deployments.
3. Can be purchased on-demand (hourly)
4. Can be purchased as a reservation for up to 70% of the price

Question 11

What is Amazon EBS?

Answer 11

EBS stands for Elastic Block Storage and it’s basically a virtual disk on the cloud

Question 12

How EBS interact with EC2?

Answer 12

EBS creates virtual disks that can be attached to EC2 instances. Once attached you can create a file system, run a database, etc…

Question 13

What are the types of EBS?

Answer 13

SSD and Magnetic

Question 14

What are the two types of SSD EBS?

Answer 14

General Purpose SSD (GP2)

Provisioned IPOS SSD (IO1)

Question 15

What’s the purpose of the General Purpose SSD in EBS?

Answer 15

Balances price and performance for a wide variety of workloads.

Question 16

What is the purpose of the Provisioned IPOS SSD in EBS?

Answer 16

Highest performance SSD for mission-critical/low-latency or high-throughput workloads

Question 17

What are the three types of Magnetic EBS?

Answer 17

Throughput Optimized (ST1)
Cold HDD (SC1)
Magnetic (Previous generation)

Question 18

What’s the purpose of Throughput Optimized (ST1) Magnetic EBS?

Answer 18

Low-cost HDD volume designed for frequently accessed throughput intensive workloads

Question 19

What’s the purpose of Cold HDD (SC1) Magnetic EBS?

Answer 19

lowest cost HDD volume designed for less frequently accessed data (file servers)

Question 20

What are the three types of Reserved Pricing Types?

Answer 20

1. Standard Reserved Instance
2. Convertible Reserved Instance
3. Scheduled Reserved Instance

Question 21

What are the two types of security networks for your EC2 instances?

Answer 21

Security Groups

VPC ACL

Question 22

What are security groups?

Answer 22

Individuals firewalls for your instances. It defines what goes in and out of your instances

Question 23

What are VPC ACL?

Answer 23

Individuals firewalls for your network (subnets). You control what goes in and out of your network