A Data structures organises the group of data element in an efficient way to store and retrieve the data from computer. Most commonly used data structures are arrays, linked list,stack,queue,hash tables. Why do we need Data Structure ? As applications becomes complex and demands for the huge data handling then processor slows down, data searching would become difficult and multiple requests to the server may slow down the system to overcome all this drawbacks we use data structure in an efficient and reusable way. Data Structure Classification Primitive Data Structure - it contains primary datatypes byte , short , int , long , char , Boolean , float and double. Non-Primitive Data Structure - it is derived from primary datatypes such as array, list, files etc (contains of collection of similar type of datatype) Arrays - array is a collection...