UGC NET CSE | August 2016 | Part 3 | Question: 40

Question

Which of the following is not a correct statement ?

• A. Every class containing abstract method must be declared abstract.
• B. Abstract class can directly be initiated with ‘new’ operator.
• C. Abstract class can be initiated.
• D. Abstract class does not contain any definition of implementation.

Comments

answer is B

An abstract class cannot be directly instantiated with new operator.

ref : https://stackoverflow.com/questions/24806959/instantiating-an-abstract-class-in-java

Answer 1

ans should be  B it is surely not correct

In general an abstract class is used to define an implementation and is intended to be inherited from by concrete classes. It's a way of forcing a contract between the class designer and the users of that class. If we wish to create a concrete class (a class that can be instantiated) from an abstract class we must declare and define a matching member function for each abstract member function of the base class. Otherwise, if any member function of the base class is left undefined, we will create a new abstract class (this could be useful sometimes).