University of Central Florida (UCF) COP3330 Object Oriented Programming Final Practice Exam

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What happens to an object of an abstract class?

It can be instantiated directly

It can be instantiated if it contains concrete methods only

It cannot be instantiated directly

An abstract class serves as a blueprint for other classes and is designed to provide a common base for derived classes. It may contain abstract methods, which are methods that are declared without an implementation, and concrete methods that have defined behavior.

Because an abstract class is not complete on its own, it cannot be instantiated directly. Instead, it must be subclassed, and only concrete subclasses that implement all abstract methods can be instantiated. This design encourages a clear separation of interface and implementation, ensuring that a derived class provides specific implementations for the abstract methods defined in the abstract class. This characteristic is fundamental in achieving polymorphism and code reusability in object-oriented programming, thus enhancing the flexibility of the software architecture.

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It can only inherit from an interface

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