Lesson 1 - Introduction and Basics

Question 1

what is EC2

Answer 1

Amazon Elastic Cloud compute

Question 2

what are instant families in EC2

Answer 2

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

Question 2

Amazon EC2 Purchase Options

Answer 2

1. On Demand - To test and work on basics and to analyse
2. Savings Plan (Upto 72%) - Average hours of usage prized in USD for 2-3 years
3. Reserved Instance - For Predictable usaged, used for known work (Upto 75%)
4. Spot Instance - Upto 90%. Aplications that can withstand interruptions like batch processing etc..
5. Dedicated Host - Dedicated resources

Question 3

Scaling of EC2

Answer 3

Beginning with few resources and designing architecture to automatically respond to changing demands by scaling in/out

Question 4

Amazon Ec2 Auto-scaling Types

Answer 4

1. Dynamic Scaling - respond to changing demands
2. Predictive scaling - scheduling right no of instances for predictable usage

Question 5

Elastic Load Balanceing (ELB)

Answer 5

Regional Construct: If more traffic, autoscaling tech, lets the elastic load balancer knows that it is ready to handle @ ELBs sends request to them

Question 6

ELB

Answer 6

refer a diagram

Question 7

Messaging and Queuing

Answer 7

1. Amazon Simple Queue Service (ASQS)
   Just sends message to queues and Receiver receives (No Subscriber Publisher)
2. Amazon Simple Notification Service (ASNS) Publisher and subscriber Model.. Receives Notifications and messages

Question 8

what is serverless in AWS

Answer 8

Cannot see/access the underlying infra or instances that are hosting our application

Question 9

what are different types of Serverless

Answer 9

1. AWS Lambda - For loads with runtime <15
2. Amazon Elastic Container service ECS -Docker based container orchestration
3. Amz Elastic Kubernates Service EKS- Kubernates based

Question 10

Differences between serverless and EC2

Answer 10

EC2- Host Traditional service. Fusll
access to Host
AWS Lambda - For short app, service
oriented app or event driven app.
No access to host
ECS,EKS - Docker or container based
workload

Question 11

what to use for server access and serverless access

Answer 11

If server access needed - EC2
Else - Fargate

Question 12

What is Fargate

Answer 12

Serverless Cloud service. For Docker or Kubernates Service