This is the second semester diploma engineering course please study well, do practice well at home and watch given videos. If you have confused you can asked me personally as well. 

Object-oriented programming is a programming paradigm based on the concept of "objects", which can contain data, in the form of fields, and code, in the form of procedures. A feature of objects is an object's procedures that can access and often modify the data fields of the object with which they are associated.