What are the Types of EC2 instances?
Difference between dedicated host and dedicated Instance?
What is the risk using Spot instance?
What are the types of Reserved instance and why its different?
What capacity Reservations do?

What is AMI in EC2?
Why Keypair required in EC2?
What is the purpose of Security groups?
If EC2 windows instances not lanuching or not opening what are the check points?
What is EBS?

What is the difference between Physical,virtual and Gloabl infra?
What is Region in AWS?
What is Availablity Zones in AWS?
What is Region Pair in AWS?
What is NIC ?

Difference between Scalabilty and Elasticity

Why we need to use the Cloud computing more that onprem?