Cloud computing basics in Intro to Computing - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is cloud computing?

Cloud computing means using the internet to access and store data and programs on remote servers instead of your own computer. It's like renting a storage unit instead of keeping everything at home.

beginner

Name three main types of cloud services.

The three main types are:<br>1. Infrastructure as a Service (IaaS) - renting virtual machines and storage.<br>2. Platform as a Service (PaaS) - renting a platform to build and run apps.<br>3. Software as a Service (SaaS) - using software over the internet like email or office apps.

beginner

What is a public cloud?

A public cloud is a cloud service offered to anyone over the internet. It's like a public library where many people share the same resources.

intermediate

Explain the benefit of scalability in cloud computing.

Scalability means you can easily increase or decrease your computing resources based on need. Like adding more seats at a party when more guests arrive, and removing them when fewer guests stay.

beginner

What does 'pay-as-you-go' mean in cloud computing?

It means you only pay for the cloud resources you actually use, like paying for electricity based on how much you consume, not a fixed amount.

Which of the following is NOT a cloud service model?

A Platform as a Service (PaaS)

B Hardware as a Service (HaaS)

C Software as a Service (SaaS)

D Infrastructure as a Service (IaaS)

Hardware as a Service (HaaS) is not a standard cloud service model. The main models are IaaS, PaaS, and SaaS.

What is an example of SaaS?

A Google Docs

B Amazon EC2 virtual machine

C Microsoft Azure platform

D Your personal laptop

Google Docs is software accessed over the internet, making it a Software as a Service (SaaS).

Which cloud type is shared by many users over the internet?

A Community cloud

B Private cloud

C Hybrid cloud

D Public cloud

Public cloud services are shared by many users and accessible over the internet.

What does scalability allow you to do in cloud computing?

A Increase or decrease resources as needed

B Avoid using the internet

C Only use free resources

D Fix your resources permanently

Scalability means adjusting resources up or down based on demand.

What is a key advantage of 'pay-as-you-go' pricing?

A You pay a fixed monthly fee

B You pay upfront for all resources

C You pay only for what you use

D You never pay for anything

'Pay-as-you-go' means paying only for the cloud resources you actually use.

Describe what cloud computing is and give a real-life analogy to explain it.

Think about how you use services without owning them.

Explain the difference between IaaS, PaaS, and SaaS with simple examples.

Consider what you get to manage or use in each service.