MCIT 591 Final Exam Questions with

MCIT 591 Final Exam | Questions with 100% Correct Answers | Verified | Latest Update

Question : Select all that are correct. Why don't we just upcast

everything to Objects?

• You lose the methods and properties that give Object-

Oriented Programming its power

• No reason, I am going to do this in all of my code now!
• You then need to worry about ClassCastExceptions when

downcasting D)You need to downcast to regain these methods and properties

Correct answer: A,C,D

Question : What is the method signature for the main method

of a Java program?

Correct answer: main(String[] args)

Question : What is overloading?

Correct answer: two methods that have the same name but

different method signatures

Question : What is overriding?

Correct answer: Declaring a method in a sub class which is

already present in the parent class in order to make the method more specialized to that sub class

Question : True or False, assertEquals uses .Equals()

Correct answer: True

Question : If you have a child class that is extended a parent

class, and that parent class has a protected method, can the child class utilize that method?

Correct answer: Yes! the only time it couldn't ( as far as I

know) is when the method is private

Question : What is cohesion?

Correct answer: similar tasks should be in the same class

Question : What is coupling?

Correct answer: interaction between two classes should be

kept low

Question : What does DRY mean?

Correct answer: Do not repeat yourself !

Question : Method Signature

Correct answer: name of the method and the method

parameters along with their data types

Question : Polymorphism

Correct answer: principle that allows the same method to exist

in different forms

Question : Why do we utilize polymorphism?

Correct answer: -Because it allows us to provide similar code

in two or more similar forms -It is important to make code DRY

Question : What is an Interface?

Correct answer: a collection of methods

Question : Why would you use an interface?

Correct answer: -you write an interface when you want

classes of various types to all have a certain set of capabilities -it helps keep your code DRY

Question : What is Inheritance?

Correct answer: -When a subclass receives its methods and

instance variables from a larger parent class -This results in the code being even more DRY

Question : What is the syntax of Inheritance?

Correct answer: class extends

Question : Liskov Substitution Principle