CS Cloud Computing & Services 3

Question 1

An e-commerce site experiences traffic spikes during sales. Which cloud feature adds or removes VM instances automatically based on CPU utilization?

Accepted Answer

Auto-scaling groups

Answer

Auto-scaling groups monitor metrics like CPU and adjust the number of instances automatically.

Question 2

Which term describes the risk of becoming dependent on one cloud provider's proprietary services, making migration difficult?

Accepted Answer

Vendor lock-in

Answer

Vendor lock-in occurs when proprietary APIs and services make switching providers costly and complex.

Question 3

A developer deploys an app to a service that handles the OS, runtime, and scaling, requiring only the application code. Which service model is this?

Accepted Answer

Platform as a Service (PaaS)

Answer

PaaS provides a managed platform including OS and runtime so developers focus solely on code.

Question 4

What does 'multi-tenancy' mean in a public cloud environment?

Accepted Answer

Multiple customers share the same physical infrastructure with logical isolation

Answer

Multi-tenancy lets many customers securely share pooled hardware through virtualization and logical isolation.

Question 5

Which cloud storage type is best suited for storing large amounts of unstructured data like images and backups, accessed via HTTP APIs?

Accepted Answer

Object storage

Answer

Object storage like Amazon S3 stores unstructured data as objects with metadata, accessed via REST APIs.

(CS) Computer Science Practice Test