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The parts of the computer that can be touched are called hardware.This include all the electronic,electrical and mechanical components of the computer.They may be present outside or inside the computer.

Computer work at both analog and digital computers.They operate by both counting and measuring.

Analog computers are faster than digital computers.They are physical quantities to show calculations.They are used in hospital,aircraft and other places.

Digital computers represent physical quantities with the help of digits or numbers.They are used in commercial and control systems. 

The act or process of defining an object in many forms represented by the  same name is known as Polymorphism.

The act or process of acquiring the properties from an existing class by another class is known as inheritance.

The act or way in which the data and methods/functions (that operate on the data) are combined together in the form of a single unit is known as encapsulation.

This is one of the essential feature of object oriented programming.For example: while using a bike a common concern is only its use and not that a bike assemble thousands of individual component we just think that it is well-defined object and ignore other details such as assembly of engine,transmission,how Braking System work and electrical component etc., instead we use it as an object i.e.just riding the bike. Defination:The act of representing the essential feature of an object without knowing its background and detail is known as abstraction or data abstraction.

1.Abstraction. 2.Encapsulation 3.Inheritance. 4.Polymorphism.

An identifiable entity with some characteristics, a state and behaviour is known as an object, an object is self-contained entity that contain attribute and behaviour.

The programming language which contains step by step procedure to execute is known as procedure oriented programming (POP).

The object oriented programming (oop) is a programming methodology that help organize set of instructions in a proper sequence to develop program or software.

A person who writes a programs is referred  to as programmer.

To produce used to write the commands and statement of programming language to find the solution of a problem is known as programming.

The sequences of set of instructions of any programming language used to find the solution of a problem is known as programming language or computer language.