Answer Posted / manoj kumar

abstract class is a class which may or may not contain
abstract method.
abstract class can,t be instantiated i.e. we can,t
create object of an abstract class.
abstract class can be subclasses .
abstract class is a class which is declared abstract.
if any class contain abstract method then it can be
declared abstract.
example
abstract class{

abstract public void display();//abstract method
}
abstract method is method which is declared but not
implemented i.e. without braces followed by semicolon.

What is the important feature of inheritance?

1111

---

Who invented oop?

1115

---

What is polymorphism oop?

1049

---

What is abstraction in oops?

1022

---

What is ambiguity in inheritance?

1095

---

What is solid in oops?

1107

---

What is the advantage of oop over procedural language?

1064

---

2. Give the different notations for the class.\

2140

---

What is Difference Between Inheritance and creating object and getting data? means Class A extends B{ B.getMethod();} (OR) Class A{ b obj=new B(); obj.getMethod(); }

2579

---

write a program to find 2^n+1 ?

2048

---

What is the difference between abstraction and polymorphism?

1080

---

Which is better struts or spring?

1041

---

What is abstraction oop?

1067

---

Why do we use oop?

1080

---

What does oop mean in snapchat?

1218

---