Can you instantiate an abstract class in Java?

• A. Yes, it can be instantiated
• B. No, it cannot be instantiated
• C. Only in a subclass
• D. Only if it has concrete methods

Answer: (B)

In Java, abstract classes serve as a blueprint for other classes. They can contain abstract methods (which are declared without an implementation) as well as concrete methods (which are fully implemented). The key characteristic of an abstract class is that it cannot be instantiated directly. This means you cannot create an object of an abstract class using the new keyword.

The purpose of abstract classes is to provide a foundation for other classes through inheritance. A subclass that extends an abstract class is required to implement any abstract methods, effectively providing concrete behavior. On the contrary, if an abstract class could be instantiated, it would defeat its purpose because there would be no way to ensure that all abstract methods are implemented.

Therefore, the assertion that an abstract class cannot be instantiated aligns with the design principles of Java and reinforces the importance of defining behavior in subclasses.