Microsoft Azure Fundamentals AZ-900 Practice Exam 2025 – Complete Study Resource

The correct answer is PaaS, which stands for Platform as a Service. PaaS provides a comprehensive environment for developers to build, deploy, and manage applications without the complexity of maintaining the underlying infrastructure. This service model includes not only the hardware and operating systems but also development tools, middleware, database management systems, and services needed for application development.

With PaaS, developers can focus on writing code, testing, and deploying applications while the platform manages the necessary runtime, storage, networking, and server resources. This abstraction allows for faster development cycles and scalability, as users can easily scale resources up or down based on demand.

In comparison, other models like SaaS (Software as a Service) provide end-user applications and services over the internet while abstracting away the underlying platform, thus not allowing for custom application development. DaaS (Desktop as a Service) focuses on delivering virtual desktops to users, and IaaS (Infrastructure as a Service) provides raw computing resources, leaving more management responsibilities on the user side. Therefore, PaaS stands out as the most suitable option for a comprehensive development and deployment environment in the cloud tailored for delivering applications.