Guide: Understand and Answer Questions on Platform as a Service (PaaS)

Understanding Platform as a Service (PaaS)
PaaS is a cloud computing model that provides users with a platform to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and deploying an app. PaaS can be delivered in three ways: as a public, private or hybrid service.

Importance of PaaS
1. Efficiency: It helps in increasing the efficiency as there's no need to worry about resource allocation, capacity planning, or software maintenance.
2. Cost-effective: Reduces the expense of hardware acquisition, provisioning and maintenance.
3. Speed: Facilitates rapid development and deployment of apps.

How PaaS Works
PaaS doesn't replace a business's entire IT infrastructure. It's based on a virtualization, whereby the PaaS provider simulates several computing environments within a single physical environment. As a result, PaaS creates an environment where users can build and deliver applications. In doing this, customers can focus on creating and running their applications, rather than managing infrastructure components.

Exam Tips: Answering Questions on PaaS
Understand the key concepts and the functioning of PaaS. Be able to compare and contrast between PaaS, SaaS, and IaaS. Understand the advantages and implications of using a PaaS service. Remember the practical applications of PaaS. Answering questions typically involves application of your theoretical knowledge, so be sure to comprehend the underlying principles as opposed to memorizing facts.