Which pairing correctly matches cloud service models with examples?

Which pairing correctly matches cloud service models with examples?

• A. IaaS (Google Compute Engine); PaaS (Azure App Service); SaaS (Gmail)
• B. IaaS (AWS EC2); PaaS (Heroku); SaaS (Office 365)
• C. PaaS (Heroku); IaaS (AWS EC2); SaaS (Office 365)
• D. IaaS (AWS EC2); SaaS (Office 365); PaaS (Heroku)

Answer: (B)

Understanding cloud service models means recognizing how much control you have over the underlying technology and what the provider manages for you. IaaS gives you raw infrastructure—virtual machines, networks, and storage—and you handle the operating system, middleware, and applications. PaaS provides a platform to develop, run, and manage applications without worrying about the underlying hardware or OS. SaaS delivers software applications themselves over the internet, managed entirely by the provider. AWS EC2 is IaaS because it offers virtual machines and basic computing resources that you configure and manage at the OS and software level. Heroku is PaaS because it supplies a deployment platform and runtime, letting you focus on writing code rather than handling servers. Office 365 is SaaS because it provides ready-to-use software applications accessed over the web, with maintenance and updates handled by the provider. This combination clearly demonstrates the mapping: infrastructure you control, platform for development, and software you use.

Understanding cloud service models means recognizing how much control you have over the underlying technology and what the provider manages for you. IaaS gives you raw infrastructure—virtual machines, networks, and storage—and you handle the operating system, middleware, and applications. PaaS provides a platform to develop, run, and manage applications without worrying about the underlying hardware or OS. SaaS delivers software applications themselves over the internet, managed entirely by the provider.

AWS EC2 is IaaS because it offers virtual machines and basic computing resources that you configure and manage at the OS and software level. Heroku is PaaS because it supplies a deployment platform and runtime, letting you focus on writing code rather than handling servers. Office 365 is SaaS because it provides ready-to-use software applications accessed over the web, with maintenance and updates handled by the provider.

This combination clearly demonstrates the mapping: infrastructure you control, platform for development, and software you use.