are two very basic data structure we need to understand, array and map. Cloud Computing is all about the delivery of on-demand computing services like server, storage, database, networking, software, analytics and more over the internet on a pay-for-user basis. The System Integration Architecture provide a bridge between the heterogeneous operational applications and platforms. The Operating system is the foundational piece of software on which all other software is built. Data science is a vast field & it can not be learn in a short period of time.