Abstraction

The process of providing necessary information and hiding unnecessary information is ____

• Inheritance

• Polymorphism

• Abstraction

• Encapsulation

Abstract Method is___

• the method which is having body

• block of statement in one unit

• A method that has no body

• static method

Abstract methods cannot be

• final

• static

• private

• All of these

An interface is a collection

• Public static methods

• public static final variables

• public abstract methods

• both 2 & 3

Interface can be inherited into a class by using____word

• extends

• implements

• abstract

• static

Abstract class is____

• a class that cannot be instantiated.

• a class which has no methods

• a class which has only abstract methods

• a class which has only overridden methods

Which of the following is valid syntax for abstract class

• abstract class A

  {

  void show(){}

  void print(){}

  }

• abstract class A

  {

  void show();

  void print();

  }

• abstract class A

  {

  abstract void show();

  abstract void print();

  void print(){}

  }

• None