CS Cloud Computing & Services 4

Question 1

A cloud region experiences a full outage, but an application stays online because it runs in two separate regions. What design principle does this illustrate?

Accepted Answer

Geographic redundancy for high availability

Answer

Deploying across multiple regions provides redundancy so a single regional failure does not cause downtime.

Question 2

What is the key difference between vertical and horizontal scaling in the cloud?

Accepted Answer

Vertical adds resources to one machine; horizontal adds more machines

Answer

Vertical scaling (scale up) increases a single instance's resources while horizontal scaling (scale out) adds instances.

Question 3

Which tool category lets teams define cloud infrastructure in declarative configuration files, such as Terraform or CloudFormation?

Accepted Answer

Infrastructure as Code (IaC)

Answer

IaC tools describe infrastructure declaratively so environments can be versioned, reviewed, and reproduced automatically.

Question 4

A workload runs on-premises normally but overflows into a public cloud during peak demand. What is this pattern called?

Accepted Answer

Cloud bursting

Answer

Cloud bursting sends overflow traffic to public cloud capacity only when private resources are saturated.

Question 5

Which cloud pricing option offers the largest discount in exchange for the risk that the provider can reclaim the instance at any time?

Accepted Answer

Spot (preemptible) instances

Answer

Spot instances use spare capacity at deep discounts but can be interrupted when the provider needs the capacity back.

(CS) Computer Science Practice Test

(CS) Computer Science Practice Test

CS Cloud Computing & Services 4