Q1.What is constructor? Q2What is encapsulation? Q3Which r parameter abstraction?

Question

Accepted Answer

A constructor is a special method used to initialize objects in a class.

Constructors have the same name as the class they belong to.
They are automatically called when an object is created.
Constructors can have parameters to initialize object properties.
They can be overloaded to provide multiple ways of object initialization.

Accepted Answer

1.ans->
Constructor is initization of instance variable construction name of class name must be same constructor did not have a return type constructed with p execute automatically when we creative object of class
There are two main types of constructor 
default 
parametarised

2.ans->
If he is looking there we can group variables and methods into a single unit class as class is a best example of encapsulation in capsulation class method variables are there purpose hide data for security purpose

3.ans->
The process of handling in implementation detail for the user only there is an real functionality will be provided to the user the user will have information on what the objects in how it does way of achieving abstract are two ways to Extractor in Java 
abstractclass 
interface