Answer 1

Inheritance is the ability of a class to inherit the attributes and methods of another class.

example

class A {
public int sum(int a, int b){
return a + b;
}

class B extends A {
int i = 2;

public static void main (String[] args){
B obj = new B();
int c = obj.sum(1,2);
}
}

Inheritance allows for reuseablity of code in your program