Technology Compute

Question 1

Answer 1

Elastic Compute Cloud

EC2

Allows you to rent and manage virtual servers in the cloud

Question 2

What are EC2 instances?

Answer 2

The virtual servers running on physical servers

Question 3

Are instances considered serverless?

Answer 3

NO

Question 4

EC2 is a foundational service used for managing your _________ _____________

Answer 4

virtual

instances

Question 5

What are Amazon Machine Image

AMI

Answer 5

A preconfigured template to launch your instance

Question 6

Can you deploy your applications directly to EC2 instances ?

Answer 6

Yes

Question 7

EC2

Free Tier plan includes

Answer 7

750 compute hours per month

Question 8

EC2 in the real world

Mention 2 real world uses

Answer 8

1.-Deploy a Database

(Deploying a database to EC2 gives you full control over the database )

2.- Deploy a Web Application

(Deploy to multiple AZs to make the web application highly available )

Question 9

Methods to Access an EC2 Instance

Answer 9

1.- AWS Mgmt Console

Config and manage your instances via a web browser

2.- EC2 Instance Connect (EIC)

EIC allow you to use IAM policies to control SSH access to your instances, removing the need to manage SSH keys

3.- Secure Shell (SSH)

SSH allows to establish a secure connection to your instance from your local laptop

4.- AWS Systems Manager

Systems Manager allows you to manage your EC2 instances via web browser or the AWS CLI

Question 10

Most common vay to connect to Linux EC2 instances

Answer 10

Secure Shell SSH

1. • Generate a key pair
2. -Connect via SSH

Question 11

What is a key pair

Answer 11

Consists of a private key ( SSH Cliente on laptop )

and

a public key ( EC2 instances )

proves your identity when connecting to an EC2 instance

Question 12

EC2 Pricing Options

Answer 12

1. • On-Demand
2. • Spot
3. • Reserved Instances
4. • Dedicated Hosts
5. • Saving Plans

Question 13

On Demand

Answer 13

Fix prices, billed down to the second based on instance type. No contract and you pay only for what you use

Fun fact

You can reserve capacity using On Demand Capacity Reservations. EC2 capacity is held whether or not you run the instance

Question 14

When to use on demand instances

Answer 14

1. • Care about low cost without any upfront payment or long term commitment
2. • Your apps have unpredictable workloads that can´t be interrupted
3. -Your applications are under development
4. • Workloads will not run longer than a year

Question 15

Spot

Answer 15

Let you take advantage of unused EC2 capacity. Your request is fulfilled only if capacity is available

Fun facts

• You can save up to 90% off On Demand prices
• You pay the spot price that´s in effect at the beginning of each hour

CHEAPEST OF OPTION

Question 16

When to use Spot

Answer 16

1. • You are not concerned about the start or stop time of your application
2. • Your workloads can be interrupted
3. • Your application is only feasible at very low compute prices

Question 17

Reserved Instances (RIs)

Answer 17

RIs allow you to commit to a specific instance type in a particular Region for 1 or 3 years

Fun facts

• Save up to 75% off On Demand Prices
• Required to sign a contract
• Reserve capacity in an Availability Zone for any duration
• Can pay All Upfront, Partial Upfront, or No Upfront. All Upfront for max term = highest discount
• Provides convertible types at 54% discount

Question 18

When to use Reserved Instances

Answer 18

1. • Application has steady state usage, and you can commit to 1 or 3 years
2. • You can pay money upfront to receive more discount
3. • You app requieres a capacity reservation

Question 19

Dedicated Hosts

Answer 19

Allo you to pay for a physical server that is fully dedicated to running your instances

Fun facts

• Save up to 70% off On Demand Prices
• You bring your existing per-socket, per-core, or per-VM SW license
• There is no multi-tenancy, server is not shared with other customers
• Dedicated host is a physical server, whereas a Dedicated Instance runs on the host

Question 20

When to use Dedicated Host

Answer 20

1. • You want to bring your own server-bound SW license from vendors like Microsoft or Oracle
2. • You have regulatory or corporate compliance requierements arond tenancy model

Question 21

Savings Plan

Answer 21

Allows you to commit to compute usage ( measured per hour ) for 1 or 3 years

Fun facts

1. • Save up to 72% off On Demand prices
2. • You are not making a commitment to a dedicated host, just compute usage
3. • Saving can be shared across various compute services like EC2, Fargate, and Lambda
4. • Does not provide a capacity reservation

Question 22

When to use Savings Plans

Answer 22

1. • Want to lower your bill across multiple compute services
2. • Want the flexibility to change compute services, instance types, operating systems or Regions

Question 23

EC2 Features

Answer 23

1. • Elastic Load Balancing. automatically distributes your incoming application traffic across multiple EC2 instances
2. • Auto Scaling.- adds or replaces EC2 instances automatically across AZs, based on need and changing demand. Horizontal scaling or scaling out ( reduces the impact of system failures and improves the availability of your applications )

NOTE: Not to confuse Scale out with Scaling up which upgrades an EC2 instance by adding more power (CPU, RAM) to an existing server

Question 24

Types of load balancers

Answer 24

Classic

Application

Gateway

Network

Question 25

Answer 25

AWS Lambda Serverless compute service that lets you run code without managing servers - You author application code called **functions**, using many popular. languages - Scales automatically - Serverless means you don´t worry about managing servers like with EC2

Question 26

Lambda in the Real World

Answer 26

1. - Real time file processing 2. - Sending email notifications 3. - Backend business logic

Question 27

Real time file processing

Answer 27

Question 28

Sending email notifications

Answer 28

Question 29

Backend business logic

Answer 29

Question 30

Lambda features

Answer 30

1. - Supports programming languages like Java, Go, PowerShell, Node.js, C#, Python, and Ruby 2. - You author cose using your favorite dev enviornment or via the console 3. - Lambda can execute your code in response to events 4. - Lambda functions have a 15 minute timeout

Question 31

Lambda Pricing Model

Answer 31

Charged based on the duration and number of requests 1. - Compute time.- Pay only for compute time used - there is no charge if your code is not running 2. - Request count.- A request is counted each time it starts execution. Test invokes in the console count as well 3. - Always free.- The free usage tier includes **1 million free request per month**

Question 32

Lambda Your responsibility ?

Answer 32

Only for application code AWS manages servers, coding environment, and language support

Question 33

Guess the service

Answer 33

AWS Fargate Serverless compute engine for containers - Fargate allows you to manage containers, like Docker - Scales automatically - Serverless means you don´t worry about provisioning, configuring, or scaling servers

Question 34

Guess the service

Answer 34

Lightsail Lightsail allows you to quickly launch all the resources you need for small projects - Deployed preconfigured apps like WordPress websites, at the click of a button - Simple screens for people with no cloud experience - Includes a VM, SSD based storage, data transfer, DNS mgmt and a static IP - Provides a low, predictable monthly fee, as los as $3.50

Question 35

Guess the service

Answer 35

AWS Outposts Run cloud services in your internal data center - Supports workloads that need to remain on prem due to latency or data processing needs - AWS delivers and installs servers in your internal data center - Used for a hybrid experience - Have access to the cloud services and APIs to develop apps on premises

Question 36

Guess the service

Answer 36

AWS Batch Allow you to process large workloads in smaller chunks ( or batches) - Runs hundreds and thousands of smaller batch processing jobs - Dynamically provisions instances based on volume