Why do you need to implement all the methods of an interface in class which implements an interface?

You have to implement program that compares graduate students based on their ranks. The design of the program is given in the following UML diagram:   • Student class: Base class that GradStudent extends. • GradStudent class: The objects from this class will be used for comparisons. • Rankable interface: Defines the implementation needed for  comparison. GradStudent implements this interface. • Test class will be used to get student information from the user and demonstrate the comparison of students.

Write a class named IceCreamCup that implements the Customizable interface. The class should have the following private instance variables. Do NOT give any method implementations for this question, but only declare the instance variables. Do NOT initialize the instance variables -- except nCups below. A String variable name describing the ice cream name • A List of Flavor s added to the cup. Name it flist Additionally, define the following static variable: • An int nCups describing the total number of ice cream cups instantiated. Initialize this variable

Given: interface B void methodA(); class C implements B { void methodB(){ } } everything is fine methodA should be overriden in class C O class C should be abstract O either b or c

Interfaces are used to define stronger is-a relationships because one class can inherit multiple interfaces.  Ture or false

QUESTION 5 All methods in an abstract class must also be declared abstract. True False QUESTION 6 All fields declared in an interface are treated as final and static have protected access must be initialized in the class implementing the interface have private access

What happens if you try to override a non-virtual or final method in a derived class?

Please see attached.

To what use does it serve for a class to have its own destructor?

Both abstract classes and interfaces may be used to specify the behavior of common objects.Which factors should you examine when deciding between an interface and an abstract class?