An abstract class is a class that contains at least one abstract method. An abstract method is a method that is declared, but not implemented in the code.

Related MCQs

• Interface are similar to abstract classes. The difference between interfaces and abstract classes are Interfaces cannot have properties, while abstract classes can have.
• Abstract classes and methods are when the parent class has a named method, but need its child class(es) to fill out the tasks.
• When inheriting from an abstract class, the child class method must be defined with the same name, and the same or a less restricted access modifier.
• Which of the following statements are true is/are true about constructors in PHP? (i) PHP 4 introduced class constructors. (ii) Constructors can accept parameters. (iii) Constructors can call class methods or other functions (iv) Class constructors can call on other constructors.
• _______ A class that inherits from another class. This is also called a subclass or derived class.
• Interfaces are declared with the ________ keyword:
• Which keyword allows class members (methods and properties) to be used without needing to instantiate a new instance of the class?
• A class property used by another class is called ______.
• Which keyword allows class members (methods and properties) to be used without needing to instantiate a new instance of the class?
• A class that is inherited from by another class. This is also called a ____