Cloud Computing is technology which accesses to share the tools and files between systems from one to another without physical contact. There are other modes of transferring files with physical contact. It reduced the physical touch between the systems. it appeared in the early of 1996 in Compaq internal document, later it popularized with Amazon by releasing the elastic cloud computing product. The components of the cloud Computing front end, back end, and a network. combined of the above components makes the cloud computing.
Software as a Service(Saas) is the provider, installing and maintaining the servicing through the other end and user utilizing from the client end to ensure updates. It Has four common Approaches that are single-instance, multi-instance, multi-tenant, and flexy tenancy. flexy tenancy is the most adaptive approach in the current era. Development as a Service(Daas) is based on non-cloud computing tools to share the locally developed and installed tools. Data as a Service(DaaS) is the place where cloud tools can be accessed through some API layer. Platform as a Service(PaaS) is the service which provides with application platforms and database services.