Object Oriented Programming (Java): True or False Statements with one line reasoning: 1. The implementation of inheritance always involves writing a few less lines. 2. The following class declaration is incorrect: public final class Class extends OtherClass {...} 3. Inheritance is only useful if specialization is used. In fact, specializing we inherit in the subclass (or subclasses) members of the superclass that we must not rewrite. Instead with the generalization we create an extra class, and then we write more code. 4. The super keyword allows you to call superclass methods and constructors. The keyword this allows you to call methods and constructors of the same class. 5. Multiple inheritance does not exist in Java because it does not exist in reality.

Overview Construct a hierarchy of classes representing savings and checking accounts as well as a means to ‘filter’ account objects. Account Classes Your solution will consist of 4 account classes as described below. It is your responsibility to define the exact relationship among those classes and translate that relationship into source code structure. There is a correct structure; the skeleton must be modified to reflect the correct relationships.  Account – represents a general account with basic operations such as deposit, withdraw, etc.  Savings – represents a savings account that must maintain a minimum balance.  Checking – represents a checking account that has no minimum balance (this means a zero balance).  CappedChecking – represents a checking account that disallows a balance above a particular maximum value. Linking Accounts A bank or credit typically allows a user the ability to link accounts together. That is, I might wish to link my checking account with my savings…

Draw a class inheritance diagram for the following set of classes: • Class Goat extends Object and adds an instance variable tail and methods milk() and jump(). • Class Pig extends Object and adds an instance variable nose and methods eat(food) and wallow(). • Class Horse extends Object and adds instance variables height and color, and methods run() and jump(). • Class Racer extends Horse and adds a method race(). • Class Equestrian extends Horse and adds instance variable weight and isTrained, and methods trot() and isTrained().

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.