How can we ensure a method is not overridden by a subclass?   a. Making a method private will make it so the subclass cannot see the method, and it will not be able to override it and change its functionality. b. The protected keyword will protect the method from being overridden. c. The purpose of inheritance is to allow a sub-class to change any implementation of the parent class, so we cannot stop a method from being overridden. d. If the method does not appear in the interface we implement, the sub-class will not override it.

Question 30 Which of the following description is TRUE?     Inheritance allows us to define a class based on another class. Child classes receive all the features from the parent class but can NOT have their own additional features.     Abstraction means that a method in a parent class can have a number of different implementations in child classes.       An interface is a completely abstract class, which contains abstract properties, methods, and variables.      The private access modifier makes members accessible only from within the class and hides them from the outside.