AWS Auto Scaling Group - POST MIDTERM

Question 1

What are the two major differentiating features of clouds compared with on-prem datacentres?

Answer 1

Elasticity and Availability on Demand.

Question 2

What is an Auto Scaling group?

Answer 2

A collection of EC2 instances that are treated as a logical unit.

Question 3

How are Auto Scaling Groups scaled?

Answer 3

Horizontally.

Question 4

Can the administrator manually add more identical EC2 instances if the demand for service is higher?

Answer 4

Yes, a dynamic approach is also available.

Question 5

Is a maximum size specified?

Answer 5

Yes.

Question 6

What do Spot Instances do?

Answer 6

Specify the percentage of capacity to be filled by on-demand instances.

Question 7

What does elasticity do?

Answer 7

Enables the provisioning of resources on demand.

Question 8

What is high availability?

Answer 8

An application running across identical instances.

Question 9

What is a load balancer?

Answer 9

A load balancer manages the traffic distribution load across the instances.

Question 10

What does the Elastic Load Balancer do?

Answer 10

The Elastic Load Balancer distributes the sessions to the servers and performs health checks on the cluster servers. If the check fails, the server is dynamically replaced.