6.Single Linked List in C adding a Node at the Beginning.
A data structure is a specialized format for organizing and storing data. General data structure types include the array, the file, the record, the table, the tree, and so on. Any data structure is designed to organize data to suit a specific purpose so that it can be accessed and worked with in appropriate ways. In computer programming, a data structure may be selected or designed to store data for the purpose of working on it with various algorithms.
In layman's terms a data structure is an object that is made up of individual variables/properties that hold data to be used by an application. A file system will probably use a data structure to read in the data into your application. A file is made up of records which can be broken down to fields. A data structured would have a variable for each field and held in an object (like an array or structure) that holds the data for the record. A file system could be a text file (flat file), spreadsheet or database. It is some sort of coordinated system to hold information. A data structure holds information, but it doesn't necessarily have to be information from a file system.