Question

1-Suppose you write an application in which one class contains code that keeps track of the state of a board game, a separate class sets up a GUI to display the board, and a CSS is used to control the stylistic details of the GUI (for example, the color of the board.) This is an example of

a.Duck Typing
b.Separation of Concerns
c.Functional Programming
d.Polymorphism
e.Enumerated Values

2-JUnit assertions should be designed so that they

a.Fail (ie, are false) if the code being tested is incorrect
b.Fail (ie, are false) if the code being tested is correct
c.Succeed (ie, are true) if the code being tested is incorrect
d.Always succeed
e.Succeed (ie, are true) if the code being tested is correct

3-Suppose your program converts from Celsius to Fahrenheit, but all the Fahrenheit values are incorrect by 32 degrees. This is a:

a.IOException
b.Syntax error
c.Runtime error
d.Checked Exception
e.Logic error

4-Suppose we are writing an application to list monsters by species. There are two types of monster, Bogeyman and Chupacabra. Each individual monster has a name and a hometown (String), as well as getters and setters. Each *type* of monster has a different method of attack and a different method of choosing victims. What is the best approach?

a.Write unrelated Boogieman and Chupacabra classes
b.Write a Boogieman interface and extend it with a Chupacabra class
c.Write an abstract Monster class and extend it with concrete Boogieman and Chupacabra classes
d.Use a single, concrete Monster class
e.Write a Monster interface and implement it with Boogieman and Chupacabra classes

5-Consider these two statements:

a) It is possible for an instance method to use a static variable

b) It is possible for a static method to use an instance variable without creating an object

Which of the following is correct?

a.Statements a and b are both true
b.Statements a and b are both false
c.Statement a is true and statement b is false
d.Statement a is false and statement b is true

6-Consider this code:

public class SpanishInquisitionAttack {
   public void announce() {
       System.out.println("Nobody Expects the Spanish Inquisition!");
   }
}

Can we create a SpanishInquisitionAttack with code in another class this way:

public SpanishInquisitionAttack a = new SpanishInquisitionAttack();

a.No, because no constructor appears in the code
b.Yes, because SpanishInquisitionAttack does not need any kind of constructor
c.No, because main() is static
d.Yes, because SpanishInquisitionAttack will have an implicit constructor
e.Yes, because main() is static

7-Consider this code:

   j.addEventHandler(MouseEvent.MOUSE_EXITED, e->{

            // [ lines omitted ]
});

This code contains a(n)

a.Static declaration
b.Native method
c.Immutable data structure
d.Lambda expression
e.Recursive call

8-A Java interface can contain

a.Method headers that require implementing classes to provide corresponding methods
b.Instance Variables
c.Code to implement methods
d.Final values (constants)

9-Consider the JavaFX methods addEventHandler() and Application.launch() (the method you call if your JavaFX Application contains a main()) Which of the following is correct?

a.addEventHandler() is a static method and Application.launch() is an instance method
b.addEventHandler() and Application.launch() are both static methods
c.addEventHandler() is an instance method and Application.launch() is a static method
d.addEventHandler() and Application.launch() are both instance methods

10-Suppose Gizmo is a Java interface, PlasmaGizmo is an abstract class that implements Gizmo, and TypeBPlasmaGizmo is a concrete class that extends PlasmaGizmo. Which of the following is/are correct?

a.It is possible to instantiate an ArrayList parameterized by Gizmo
b.It is possible to instantiate an ArrayList parameterized by PlasmaGizmo
c.It is possible to instantiate an ArrayList parameterized by TypeBPlasmaGizmo
d.It is possible to instantiate an object of class Gizmo
e.It is possible to instantiate an obejct of class PlasmaGizmo

11-Suppose Sheep exhibit different behavior according to the number of Sheep that have been instantiated in the application. One Sheep wanders around at random, two Sheep face in opposite directions to watch for predators, and three or more Sheep organize themselves in a circular herd with the larger animals towards the outside and the juveniles on the inside. All of this behavior is coded in the Sheep class. What is the best way to keep track of the number of Sheep in the application?

a.Use a lambda expression
b.Instantiate the Sheep using an implicit constructor
c.Use a static variable
d.Use an instance variable
e.Save each Sheep to a file using text I/O and read the files when the Sheep need to decide what to do

12-Suppose you are writing an application that will model bank accounts. The two types of account, SavingsAccount and CheckingAccount, each have balances, account owners, and account numbers as well as getters and setters for these values. SavingsAccount also has a method, run daily, that calculates interest on the account. Which of the following is the best alternative?

a.Override the calcInterest() method from String
b.Use a single class, include the calcInterest() method, and just don’t use it with checking accounts
c.Both CheckingAccount and SavingsAccount are concrete classes that extend the abstract class Account
d.Both CheckingAccount and SavingsAccount are abstract classes, which are extended by the concrete classes ConcreteCheckingAccount and Concrete SavingsAccount
e.Both CheckingAccount and SavingsAccount implement the interface Account

13-Suppose Bar is a Java interface and BigBar and GinormousBar are concrete classes that implement Bar. Our application contains this line of code:

List<Bar> barList = new ArrayList <Bar>();

Which of the following is/are possible?

a.Instantiate a Bar and add it to the list
b.Instantiate a BigBar and add it to the list
c.Instantiate a GinormousBar and add it to the list
d.Create a class that extends both BigBar and GinormousBar

14-Which of the following statements about binary file I/O is FALSE?

a.It allows an application to read and write entire objects to and from files
b.It uses a plain text file format
c.It requires casting objects when they are read from files
d.It makes parsing code unnecessary
e.The Java code to implement it is platform-independent

15-Consider this code:

EventHandler<InputEvent> mouseHandler = new EventHandler<InputEvent>() {
    boolean wall = false;

    @Override
    public void handle(InputEvent event) {
     wall = toggleWall(j, wall, row, col);
    }
   };

This code contains a(n)

a.Lambda expression
b.Anonymous class
c.Recursive method call
d.Static method

16-Consider this diagram:

Person Address Street City State Postal Code Country Validate Output As Label Name Phone Number Email Address 0..1 lives at Purchase Parking Pass Student Professor Salary Student Number Average Mark s Eligible To Enrol Get Seminars Taken

This is a

a.Class Diagram
b.State Diagram
c.State diagram
d.Interaction Diagram
e.Sequence Diagram

Answer 1

Hi Friend,

I have answered first 6 Questions.

Please repost others in separate post.

Q1. b.Separation of Concerns
Q2. a.Fail (ie, are false) if the code being tested is incorrect
Q3. e.Logic error
Q4. c.Write an abstract Monster class and extend it with concrete Boogieman and Chupacabra classes
Q5. c.Statement a is true and statement b is false
Q6. d.Yes, because SpanishInquisitionAttack will have an implicit constructor