Which statement correctly describes IaaS, PaaS, and SaaS with examples?

Which statement correctly describes IaaS, PaaS, and SaaS with examples?

• A. SaaS provides ready-made software (Salesforce).
• B. IaaS provides virtualized hardware (VMs).
• C. IaaS provides virtualized hardware (VMs); PaaS provides platform to deploy apps (Heroku); SaaS provides ready-made software (Salesforce).
• D. IaaS provides cloud storage only; PaaS provides database; SaaS provides email.

Answer: (C)

Understanding cloud service models: IaaS provides the building blocks of computing—virtual machines, storage, and networking—so you can install and manage your own operating systems and applications. PaaS sits on top of that and offers a ready-made platform for developing, deploying, and scaling applications, handling runtime, middleware, and development tools so you can focus on coding. SaaS delivers complete software applications managed by the provider, accessible over the internet with no installation required on your side. For example, IaaS is shown by virtual machines like Amazon EC2 or Azure VMs; PaaS by platforms such as Heroku or Google App Engine; SaaS by ready-made apps like Salesforce or Gmail. This statement correctly maps each service model to its capability and a representative example. The other options either mention only one model or give an incomplete or inaccurate description of what each layer provides.

Understanding cloud service models: IaaS provides the building blocks of computing—virtual machines, storage, and networking—so you can install and manage your own operating systems and applications. PaaS sits on top of that and offers a ready-made platform for developing, deploying, and scaling applications, handling runtime, middleware, and development tools so you can focus on coding. SaaS delivers complete software applications managed by the provider, accessible over the internet with no installation required on your side. For example, IaaS is shown by virtual machines like Amazon EC2 or Azure VMs; PaaS by platforms such as Heroku or Google App Engine; SaaS by ready-made apps like Salesforce or Gmail.

This statement correctly maps each service model to its capability and a representative example. The other options either mention only one model or give an incomplete or inaccurate description of what each layer provides.