Cloud service models (IaaS, PaaS, SaaS) in AWS - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Identify the correct cloud service model for managing virtual machines

You want to rent virtual machines where you control the operating system and software but do not manage the physical hardware. Which cloud service model fits this scenario?

A Software as a Service (SaaS)

B Platform as a Service (PaaS)

C Infrastructure as a Service (IaaS)

D Function as a Service (FaaS)

💡 Hint

Think about which model gives you control over the OS but not the hardware.

IaaS provides virtual machines and hardware resources, letting you manage OS and software. SaaS delivers ready-to-use applications. PaaS offers a platform to develop apps without managing OS. FaaS is event-driven code execution.

❓ service_behavior

intermediate

Which cloud service model automatically handles software updates and infrastructure?

You use a cloud email service where you only use the application and do not worry about updates or servers. Which service model is this?

A Container as a Service (CaaS)

B Platform as a Service (PaaS)

C Infrastructure as a Service (IaaS)

D Software as a Service (SaaS)

💡 Hint

Consider which model delivers fully managed applications.

SaaS delivers fully managed software applications accessible over the internet. Users do not manage infrastructure or updates. IaaS and PaaS require more user management. CaaS is about container management.

❓ Architecture

advanced

Choose the best cloud service model for developing and deploying custom web applications without managing servers

Your team wants to build a web app and focus only on code and data without handling server setup or OS maintenance. Which cloud service model should you choose?

A Database as a Service (DBaaS)

B Platform as a Service (PaaS)

C Software as a Service (SaaS)

D Infrastructure as a Service (IaaS)

💡 Hint

Think about which model provides a ready platform for app development and deployment.

PaaS offers a platform with tools and environment to develop, test, and deploy applications without managing servers or OS. IaaS requires managing servers. SaaS is for ready apps. DBaaS is only for databases.

❓ security

advanced

In which cloud service model does the customer have the most responsibility for security configuration?

Consider the shared responsibility model. In which cloud service model does the customer need to secure the operating system, applications, and data?

A Infrastructure as a Service (IaaS)

B Software as a Service (SaaS)

C Network as a Service (NaaS)

D Platform as a Service (PaaS)

💡 Hint

Think about which model gives you control over OS and apps.

In IaaS, the cloud provider secures hardware and network, but customers secure OS, applications, and data. In SaaS and PaaS, providers handle more security layers. NaaS focuses on network services.

✅ Best Practice

expert

Which cloud service model is best suited for rapid scaling of stateless applications with minimal infrastructure management?

You need to deploy a stateless app that can quickly scale up and down based on demand, minimizing infrastructure setup and maintenance. Which cloud service model aligns best?

A Function as a Service (FaaS)

B Infrastructure as a Service (IaaS)

C Software as a Service (SaaS)

D Platform as a Service (PaaS)

💡 Hint

Consider serverless options that run code on demand without managing servers.

FaaS (serverless) runs code in response to events, automatically scaling without server management. IaaS and PaaS require more infrastructure setup. SaaS is for ready apps, not custom code scaling.