Solution: Cloud computing is a paradigm of distributed computing to provide the customers with on-demand, utility based computing services. Cloud users can provide more reliable, available and updated services to their clients in turn.

Solution: The statement is true. There are three types of users often called as cloud stakeholders.

Solution: There are three types of stakeholders cloud providers, cloud users and the end users.

Solution: The cloud users use these services pay-as-you-go model. The cloud users develop their product using these services and deliver the product to the end users.

Solution: There is no protected cloud. There are three types of cloud-private, public and hybrid.

Solution: This happens in public cloud. Services are provided to the users using utility computing model.

Solution: The hybrid cloud is composed of multiple internal or external clouds. This is the scenario when an organization moves to public cloud computing domain from its internal private cloud.

Solution: Virtualization enables the migration of the virtual image from one physical machine to another. This feature is useful for cloud as by data locality lots of optimization is possible.

Solution: Most of the cloud architectures are built on Grid architecture. Grid is a type of distributed computing architecture where organizations owning data centers collaborate with each other to have common benefits.

Solution: SAAS is Software as a service. It delivers a single application through the web browser to thousands of customers using a multitenant architecture.