Compute

Question 1

What does Lightsail provide?

Answer 1

Quick and easy to setup of instances, containers, storage, and managed databases

Question 2

Lightsail is best for?

Answer 2

small websites, blogs, low usage workloads

Question 3

EKS integrates with …?

Answer 3

ECR for containers images
Elastic Load Balancing for load distribution
IAM for authentication
vpc for isolation

Question 4

How EKS provides high availability and scalability

Answer 4

Master nodes are regionally resilient( put accross multiple AZs
Worker nodes can be spread across multiple was account and vpcs
uses ELB to distribute traffic, Auto scaling to adjust number of nodes

Question 5

EKS Deployment Options

Answer 5

Standard - managed by aws, workers on ec2 or fargate
EKS on AWS Outposts - on-premises and cloud ( on aws compute)
EKS Anywhere - eks on any hardware in you data center

Question 6

EKS Monitoring

Answer 6

eks control plane provides logs to amazon cloudWatch logs, api calls recorded in CLoudTrail as events

Question 7

ECS is global service?

Answer 7

False, is regional

Question 8

What is required to start using ECS?

Answer 8

Need to create ECS cluster with VPC

Question 9

What ECS provides?

Answer 9

container management service to run, stop and manage containers on a cluster

Question 10

Is ECS self-managed?

Answer 10

Yes in cluster mode, serverless with Fargate

Question 11

Where are docker volumes stored?

Answer 11

local instance store volume, EBS volume, or EFS volume,Fsx lustre

Question 12

ESC modes

Answer 12

ec2 - cheaper, best for constant, big workloads, net to maintain
fargate - pay as you go, best for small,burst, batch workloads

Question 13

ESC service definition

Answer 13

how many copies, HA, restarts etc

Question 14

ECS task definition

Answer 14

represents an application, what steps are needed for that app

Question 15

ECS container definition

Answer 15

specify which image to use, how much CPU and memory the container is allocated, and many more options.

Question 16

ECS integrates with..

Answer 16

ECR - for docker images
ELB for load balancing
CloudWatch for Logs

Question 17

AWS Batch allows…

Answer 17

to run batch jobs across multiple az in region

Question 18

AWS Batch is a regional service

Answer 18

true

Question 19

Elastic Beanstalk is X aaService

Answer 19

Platform as a service, like Cloud Foundry

Question 20

What provides Beanstalk?

Answer 20

automatically handles the details of capacity provisioning, load balancing, scaling, and application health monitoring

Question 21

What is fargate?

Answer 21

Serverless container engine, works with EKS and ECS

Question 22

Is Fargate public or private service?

Answer 22

It is private, elastic network interface with private IP is assigned. Public IP can be assigned or NAT gateway attached

Question 23

Is Lambda public service?

Answer 23

Yes, by default

Question 24

Limits for Lambada

Answer 24

execution max 15 minutes, size 512mb - 10GB

Question 25

How Lambda scales?

Answer 25

scales autmatically when code is executed

Question 26

How Lambda preserve state?

Answer 26

Lambda is stateless service

Question 27

lambda synchronous invocation - (services)

Answer 27

API Gateway, Cognito, DAta firehose, cloudfront

Question 28

lambda asynchronous invocation - (services)

Answer 28

API Gateway, s3, cloudwatch logs, event bridge, codecommit, cloudformation, Config

Question 29

Event Source Mapping

Answer 29

lambda reads event from queue or stream and invokes lambda function on that event

Question 30

Lambda support event source mappings for..

Answer 30

kinesis, dynamodb,sqs,mq,managed streaming for kafka

Question 31

lambda provisioned concurrency

Answer 31

allocate lambda resources and hold it on standby

Question 32

how lambda can be used with cloudFront?

Answer 32

you can use lambda function or request to and from CloudFront (and origin)

Question 33

Lambda SnapStart

Answer 33

speeds up your Java applications by reusing a single initialized snapshot

Question 34

How to coordinate multiple lambda functions

Answer 34

aws step functions

Question 35

x-ray for lambda

Answer 35

distributed tracing

Question 36

How to inject user data to ec2 instance?

Answer 36

using User Data in UI/ or in cloud formation template, defining cloudinit

Question 37

What is metadata service ip?

Answer 37

169.254.169.254

Question 38

ec2 launch types

Answer 38

on-demand- short workload,predictable pricing
Reserved (1/3 years) - long workloads, pay upfront, 75% cheaper, region locked,or az locked
spot -90% savings, can be interupted

Question 39

dedicated host vs dedicated instance

Answer 39

pay for a physical host that is fully dedicated to running your instances vs you are not sharing instance with anyone, but instance might change

Question 40

ec2 placement groups

Answer 40

Cluster- same rack, low latency, single az
Spread - distributed across AZs, HA,
Partition - set o partitions per AZ, each partition has multiple instances

Question 41

ENI

Answer 41

Elastic Network Interface - logical networking component, represents network card, bound to AZ

Question 42

How to get detailed logs and metrics from ec2?

Answer 42

Install cloudWatch Agent

Question 43

What is a target group

Answer 43

group of resources (ec2) to use with Elastic load balancers

Question 44

what is a launch template?

Answer 44

specify ami, instance typ, key pair, security group, block device mapping for Auto scaling group