MIDTERM 01

Section 2

1. In computing, a textual storyboard is called a source code: a list of actions to perform a task or solve a problem. True or false? Mark for Review
(1) Points

True

False (*)

[Incorrect] Incorrect. Refer to Section 2 Lesson 1.

2. In Alice, which of the following programming statements moves the cat backward, half the distance to the bird? Mark for Review
(1) Points

this.Cat move backward {this.Bird getDistanceTo this.Cat / 2}

this.Cat move forward {this.Bird getDistanceTo this.Cat / 2}

this.Bird move forward {this.Bird getDistanceTo this.Cat / 2}

this.Cat move backward {this.Cat getDistanceTo this.Bird / 2} (*)

[Correct] Correct

3.

Expressions with relational operators produce true and false values. True or false?

Mark for Review
(1) Points
True (*)
False

[Correct] Correct

4. A typical application uses various values and these values continuously change while the program is running. True or false? Mark for Review
(1) Points

True (*)

False

[Correct] Correct

5. In Alice, which of the following are benefits of separating out motions into their own procedures? Mark for Review
(1) Points

(Choose all correct answers)

It makes the animation easier to run.

It makes the scene easier to view.

It simplifies code and makes it easier to read. (*)

It allows many objects of a class to use the same procedure. (*)

It can allow subclasses of a superclass to use a procedure. (*)

[Correct] Correct
Section 2

6. In Alice, procedural abstraction is the concept of making code easier to understand and reuse. True or false? Mark for Review
(1) Points

True (*)

False

[Correct] Correct

7. In Alice, when a new procedure is declared, all subclasses of the superclass will inherit the procedure. True or false? Mark for Review
(1) Points

True (*)

False

[Correct] Correct

8. From your Alice lessons, variables are fixed and cannot be changed. True or false? Mark for Review
(1) Points

True

False (*)

[Correct] Correct

9. From your Alice lessons, what can be used as a guideline to ensure your animation fulfills animation principles? Mark for Review
(1) Points

The Internet

Animation checklist (*)

A close friend

None of the above

[Correct] Correct

10. From your Alice lessons, number, boolean, String and object are all examples of variable types. True or false? Mark for Review
(1) Points

True (*)

False


Section 2

11. Which of the following is not an example of the logic of an IF control structure? Mark for Review
(1) Points

Play the video three times. (*)

If the play button is pressed, then play the video one time.

If the doorbell rings, then the door opens.

If the bird rings the bell, a treat is dispensed.

[Correct] Correct

12. Main is an example of what in the following code?
public static void main (String[] args) {
System.out.println{"Hello World!");
} Mark for Review
(1) Points

An instance

A method (*)

A class

A variable


13. A complete Alice instruction includes which of the following components? Mark for Review
(1) Points


Image

Class

Procedure (*)

Direction (*)

Amount (*)


14. In Alice, which of the following instructions roll the Blue Tang fish left 1 meter? Mark for Review
(1) Points

this.blueTang roll Left 1.0 (*)

this.blueTang Left 1.0

this.blueTang Left 1

this.blueTang roll Left 1

[Correct] Correct

15. From your Alice lessons, random numbers are set in the distance and duration arguments in a procedure. True or false? Mark for Review
(1) Points

True (*)

False

[Correct] Correct

Section 2

16. From your Alice lessons, what is a one-shot procedural method? Mark for Review
(1) Points

A procedure that is invoked when the Run button is clicked.

A procedure that is used to make a scene adjustment. (*)

A procedure that is dragged into the code editor.

A procedure that is used to launch the program.

[Correct] Correct

17. From your Alice lessons, an instance's properties cannot be modified. True or false? Mark for Review
(1) Points

True

False (*)


18. From your Alice lessons, saving multiple versions of an Alice animation scene is unimportant, because it does not save time. It actually wastes time. True or false? Mark for Review
(1) Points

True

False (*)

[Correct] Correct

19. What Alice tool can be used to diagram the If conditional execution statement? Mark for Review
(1) Points

Cause and effect diagram

Process flow diagram (*)

Conditional flow diagram


20. From your Alice lessons, the If control structure can process one true and one false response. True or false? Mark for Review
(1) Points

True (*)

False

[Correct] Correct

Section 2

21. The Alice If control structure requires the false statement to be populated. True or false? Mark for Review
(1) Points

True

False (*)

[Correct] Correct

22. In Alice, which of the following arguments are available to further refine an object's movements? Mark for Review
(1) Points


Object

Distance (*)

Duration (*)

Delay


23. From your Alice lessons, where should comments be placed? Mark for Review
(1) Points

Above each set of programming statements. (*)

At the end of the program.

In the scene editor.

In their own procedure.

[Correct] Correct

24. In Alice, once procedures are added to a control statement, they cannot be changed. True or false? Mark for Review
(1) Points

True

False (*)

[Correct] Correct

25. In Alice, functions are dragged into the control statement, not the procedure. True or false? Mark for Review
(1) Points

True

False (*)

[Correct] Correct

Section 3

26. Which of the following demonstrates a Greenfoot subclass/superclass relationship? Mark for Review
(1) Points

A dog is a subclass of the cat superclass.

A rose is a subclass of the flower superclass. (*)

A computer is a subclass of a video game superclass.

A single person is a superclass of the human subclass.

[Correct] Correct

27. In Greenfoot, which of the following are execution controls? Mark for Review
(1) Points


Run (*)

Act (*)

Speed (*)

Move

Turn

[Correct] Correct

28. In a Greenfoot if-else statement, if the condition is true, the if-statement is executed, and then the else-statement is executed. True or false? Mark for Review
(1) Points

True

False (*)

[Correct] Correct

29. From your Greenfoot lessons, which type of constructor can be used to automate creation of Actor instances? Mark for Review
(1) Points

Animal

World (*)

Actor

Vector


30. From your Greenfoot lessons, classes can only use the methods they have inherited. They cannot use methods from other classes. True or false? Mark for Review
(1) Points

True

False (*)

[Correct] Correct

Test: Java Fundamentals Mid Term Exam

Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer.
Section 3

31. From your Greenfoot lessons, how do you test that your code does not contain bugs? Mark for Review
(1) Points

Write the code.

Inspect the instances.

Review the documentation.

Compile the code. (*)

[Correct] Correct

32. From your Greenfoot lessons, which line of code is missing something?

Mark for Review
(1) Points

1

3 (*)

4

5

6

[Correct] Correct

33. In Greenfoot, you may perform the programming tasks of create and test many times. True or false? Mark for Review
(1) Points

True (*)

False

[Correct] Correct

34. Greenfoot does not have tools to record sound. True or false? Mark for Review
(1) Points

True

False (*)

[Correct] Correct

35. In Greenfoot, which method checks if a key on the keyboard has been pressed? Mark for Review
(1) Points

keyPress method

keyUp method

keyDown method (*)

keyClick method


Section 3

36. In Greenfoot, actor constructors can be used to create images or values and assign them to the variables. True or false? Mark for Review
(1) Points

True (*)

False

[Correct] Correct

37. When you re-initialize a scenario, Greenfoot automatically displays an instance of the World subclass in the scenario. True or false? Mark for Review
(1) Points

True (*)

False


38. In Greenfoot, an if-statement is used to alternate between displaying two images in an instance. True or false? Mark for Review
(1) Points

True

False (*)


39. In Greenfoot, a local variable is declared at the beginning of a class. True or false? Mark for Review
(1) Points

True

False (*)


40. In Greenfoot, what is a common letter used for the loop variable? Mark for Review
(1) Points

A

I (*)

X

Y

[Correct] Correct

Section 3

41. In Greenfoot, which of the following statements could prevent an infinite loop from occurring? Mark for Review
(1) Points

I = 100 + i

i=1

i = i

i = i + 1 (*)

[Correct] Correct

42. Use your Greenfoot knowledge to answer the question. One reason to write a defined method in a class is to change the behavior of the class. True or false? Mark for Review
(1) Points

True (*)

False

[Correct] Correct

43. To execute a method in your Greenfoot game, where is it called from? Mark for Review
(1) Points

The world

The act method (*)

The actor class

The gallery


44. In Greenfoot, defined methods must be used immediately. True or false? Mark for Review
(1) Points

True

False (*)

[Correct] Correct

45. In the Greenfoot IDE, which of the following is not a property of an instance? Mark for Review
(1) Points

Position

Inherited methods

Scenario name (*)

Defined methods

Section 3

46. What does the following Greenfoot programming statement do?

turn(18); Mark for Review
(1) Points

Turn the object 36 degrees.

Turn the object 18 degrees. (*)

Turn the object 18 steps forward.

Move the object 18 steps forward.

[Correct] Correct

47. What type of Greenfoot method would be used to turn an object? Mark for Review
(1) Points

orientTo( );

turnAround( );

move ( );

turn( ); (*)

[Correct] Correct

48. From your Greenfoot lessons, abstraction techniques can only be used once in a class's source code. True or false? Mark for Review
(1) Points

True

False (*)


49. Use your Greenfoot knowldege: Abstraction occurs in many different ways in programming. True or false? Mark for Review
(1) Points

True (*)

False

[Correct] Correct

50. In Greenfoot, what happens if the condition is false in an if-statement? Mark for Review
(1) Points

The programming statements are executed.

The if-statement is executed.

The act method is deleted.

The programming statements are not executed. (*)

[Correct] Correct
1. What Alice tool can be used to diagram the If conditional execution statement?
Cause and effect diagram
Process flow diagram (*)
Conditional flow diagram

2. A conditional loop is a loop that will continue forever. True or false?
True False (*)

3. From your Alice lessons, the If control structure can process one true and one false response. True or false
True (*)

4. From your Alice lessons, a textual storyboard provides a detailed, ordered list of the actions each object performs in each scene of the animation. True or false?
True (*) False

5. Identify an example of an Alice expression.
"I feel happy."
If or Where
3x3=9 (*)
None of the above

6. In Alice, Do In Order and Do Together:
Are move statements
Are control statements (*)
Are complex statements
None of the above

7. In Alice, the vehicle property will associate one object to another. True or false?
True (*) False

8. In Alice, functions are dragged into the control statement, not the procedure. True or false?
True False (*)

9. Do In Order and Do Together are the only control statements available in Alice. True or false?
True False (*)

10. In Alice, objects inherit the characteristics of their:
Code
Project
Class (*)
Program

11. In Alice, when a new procedure is declared, its motions are coded in a separate tab. True or false?
True (*) False

12. In Alice, a person object inherits its procedures, functions, and properties from which of the following classes? (Choose all correct answers)
Object subclass
Biped class (*)
Quadruped class
Person subclass (*)

13. From your Alice lessons, variables are fixed and cannot be changed. True or false?
True False (*)

14. Define the value of the variable LapCount based on the following math calculation: LapCount + 10 = 15
2
4
5 (*)
15
10

15. A variable is a named location inside the computer's memory; once there, the information can be retrieved and changed. True or false?
True (*) False

16. Which of the following does not describe variables?
A place in memory where data of a specific type can be stored for later retrieval and use.
Has a unique name.
Has a type associated with it.
Arranged in rows and columns. (*)

17. A typical application uses various values and these values continuously change while the program is running. True or false?
True (*) False

18. Which of the following is a procedure to precisely position an Alice object?
Move
Turn
Roll
MoveToward
All of the above (*)

19. All objects in Alice have three dimensional coordinates on which axes? (Choose all correct answers)
x (*)
y (*)
z (*)
w
All of the above

20. From your Alice lessons, how do you add an instance to a scene in Alice?
Select the instance from your computer's network.
Write code that places the instance in the scene.
Select the class, then drag the object into the scene. (*)
Call the addObject method.

21. Which of the following is not an example of the logic of an IF control structure?

22. Each parameter is listed with its name first, then its data type. True or false?
True False (*)

23. Which Alice execution task corresponds with the following storyboard statement?
Cat turns to face mouse.

this.mouse turnToFace this.cat
mouse turnTo cat
this.cat turnToFace this.mouse (*)
cat TurnTo mouse

24. In Alice, which of the following procedures make an object say something?
talk
speak
say (*)
audible

25. From your Alice lessons, random numbers are set in the distance and duration arguments in a procedure. True or false?
True (*) False

26. In Greenfoot, what type of parameter does the keyDown method expect?

String (*)
Boolean
Integer
Method

27. From your Greenfoot lessons, the keyDown method is located in which class?
Actor
Greenfoot (*)
GreenfootImage
World

28. From your Greenfoot lessons, if the condition in an if-statement is true, the first code segment is executed. True or false?
True (*) False

29. Use your Greenfoot knowldege: Abstraction occurs in many different ways in programming. True or false?
True (*) False

30. From your Greenfoot lessons, abstraction techniques can only be used once in a class's source code. True or false?
True False (*)

31. In Greenfoot, you must first create an instance before you create a class. True or false?
True False (*)

32. From your Greenfoot lessons, an instance inherits all of the characteristics of the class, and those characteristics
cannot be changed. True or false?
True False (*)

33. From your Greenfoot lessons, how do you call a defined method?

Call the method from the act method. (*)
Call the method from the defined method.
Write the method in the World superclass.
Write the method in the instance.
Write the method in the source code.

34. Use your Greenfoot knowledge to answer the question. One reason to write a defined method in a class is to change the behavior
of the class. True or false?

True (*) False

35. From your Greenfoot lessons, to save space in the act method, you can write an entirely new method below it, called a _____________.
Class method
Instance method
Defined method (*)
World method
Code method

36. In Greenfoot, which of the following statements could prevent an infinite loop from occurring?
I = 100 + i
i=1
i = i
i = i + 1 (*)

37. In Greenfoot, which statement is a correct example of string concatenation?

Duke duke = new Duke(keyNames[i], soundNames[i]);
Duke duke = (keyNames[i], soundNames[i] + ".wav");
Duke duke = new Duke(keyNames[i], soundNames[i] + ".wav"); (*)
Duke duke = (soundNames[i] + ".wav");

38. From your Greenfoot lessons, which of the following logic operators represents "and"?

&
&& (*)
=
!

39. We can use the Actor constructor to automatically create Actor instances when the Greenfoot world is initialized. True or false?
True False (*)

40. Use your Greenfoot knowledge to answer the question: Where are defined variables typically entered in a class's source code?

In the defined method in the source code.
Between the constructors and methods in the source code.
After the constructors and methods in the source code.
At the top of the source code, before the constructors and methods. (*)

41. Using the Greenfoot IDE, when is a constructor automatically executed?

When source code is written.
When a new image is added to the class.
When a new instance of the class is created. (*)
When the act method is executed.

42. From your Greenfoot lessons, which axes define an object's position in a world?

x (*)
z
y (*)
w

43. When a Greenfoot code segment is executed in an if-statement, each line of code is executed in sequential order. True or false?

True (*) False

44. From your Greenfoot lessons, which of the following comparison operators represents "greater than"?

> (*)
<
= =
! =

45. In Greenfoot, you will not receive an error message if your code is incorrect. It will simply not work, and you will have to determine why the code doesn't work. True or false?

True False (*)

46. In the Greenfoot IDE, which of the following is not a property of an instance?

Position
Inherited methods
Scenario name (*)
Defined methods


turn(18);


48. In the Greenfoot IDE, which of the following are components of a parameter?

Parameter type (*)
Parameter return
Parameter name (*)
Parameter method
Parameter void

49. From your Greenfoot lessons, what is incorrect in this code example:
setLocation(getX(), (int) (altitude);

Spacing
Capitalization
Parenthesis (*)
Comma

50. In Greenfoot, in which programming task are the objects identified?

Define the problem.
Design the solution.
Program the solution. (*)
Test the solution.

Section 2

1. Which of the following is not a step in the Alice animation development process? Mark for Review
(1) Points

Sell the animation (*)

Define the scenario

Run the animation

Design a storyboard

Program the animation

Correct

2. In Alice, which of the following programming statements moves the butterfly forward, double the distance to the tree? Mark for Review
(1) Points

this.Butterfly move forward {this.Butterfly getDistanceTo this.Tree * 2} (*)

this.Butterfly move backward {this.Butterfly getDistanceTo this.Tree * 2}

this.Butterfly move backward {this.Butterfly getDistanceTo this.Tree / 2}

this.Butterfly move forward {this.Butterfly getDistanceTo this.Tree / 2}

Correct

3. From your Alice lessons, the If control structure can process one true and one false response. True or false? Mark for Review
(1) Points

True (*)

False

Correct

4. In Alice, we use the While control statement to implement the conditional loop. True or false? Mark for Review
(1) Points

True (*)

False

Correct

5. A loop can be infinite (continue forever) or conditional (stops upon a condition). True or false? Mark for Review
(1) Points

True (*)

False

Section 2

6. In Alice, procedural abstraction is the concept of making code easier to understand and reuse. True or false? Mark for Review
(1) Points

True (*)

False

Correct

7. In Alice, if a procedure is declared for MyClownFish, which classes can use the procedure? Mark for Review
(1) Points

MyClownFish class and MySwimmer class

MyClownFish class (*)

MyPajamaFish class, MyClownFish class, and MySwimmer class

Any class with "Fish" in the class name

Incorrect. Refer to Section 2 Lesson 4.

8. In Alice, which of the following are benefits of separating out motions into their own procedures? Mark for Review
(1) Points


It makes the animation easier to run.

It makes the scene easier to view.

It simplifies code and makes it easier to read. (*)

It allows many objects of a class to use the same procedure. (*)

It can allow subclasses of a superclass to use a procedure. (*)


9. In Alice, which of the following instructions move the Blue Tang fish forward 2 meters? Mark for Review
(1) Points

this.blueTang move Forward 0.2

this.blueTang move Forward 2

this.blueTang move Backward 2

this.blueTang move Forward 2.0 (*)

Correct

10. From your Alice lessons, the Do In Order control statement is also referred to by what other name? Mark for Review
(1) Points

Sequence control

Sequential control (*)

Control order

Order control


Section 2

11. In Alice, which of the following procedures play a sound? Mark for Review
(1) Points

playSound

playAudio (*)

playSoundFile

playFile


12. From your Alice lessons, the "Checklist for Animation Completion" does not ask questions about the scenario and storyboards, because these are not valid parts of the animation creation process. True or false? Mark for Review
(1) Points

True

False (*)

Correct

13. From your Alice lessons, when coding for keyboard control, the programmer's job is to consider at least 70% of every key stroke the user could take. True or false? Mark for Review
(1) Points

True

False (*)


14. From your Alice lessons, you can run the animation to test that it works properly. True or false? Mark for Review
(1) Points

True (*)

False


15. Expressions with relational operators produce true and false values. True or false?
Mark for Review
(1) Points
True (*)
False

Correct

16. Which of the following does not describe variables? Mark for Review
(1) Points

A place in memory where data of a specific type can be stored for later retrieval and use.

Has a unique name.

Has a type associated with it.

Arranged in rows and columns. (*)

Correct

17. From your Alice lessons, a Do Together statement embedded with two move statements is an example of what? Mark for Review
(1) Points

Harmony

Compilation

Forward thinking

Nesting (*)


18. In Alice, once procedures are added to a control statement, they cannot be changed. True or false? Mark for Review
(1) Points

True

False (*)


19. Do In Order and Do Together are the only control statements available in Alice. True or false? Mark for Review
(1) Points

True

False (*)


20. From your Alice lessons, built-in functions provide precise property details for the following areas: Mark for Review
(1) Points

Proximity and size

Distance to and nesting

Proximity, size, spatial relation, and point of view (*)

Proximity and point of view

Correct

21. Which of the following is not an example of the logic of an IF control structure? Mark for Review
(1) Points





Correct

22. Which of the following statements about methods is false? Mark for Review
(1) Points

Classes must be defined directly within a method definition. (*)

Methods whose return type is not void are required to include a return statement specifying what to return.

The order in which methods are listed within the class is not important.

Java does not permit nesting one method definition within another method's definition.


23. From your Alice lessons, how do you add an instance to a scene in Alice? Mark for Review
(1) Points

Select the instance from your computer's network.

Write code that places the instance in the scene.

Select the class, then drag the object into the scene. (*)

Call the addObject method.

Correct

24. All objects in Alice have three dimensional coordinates on which axes? Mark for Review
(1) Points


x (*)

y (*)

z (*)

w

All of the above


25. From your Alice lessons, what is a one-shot procedural method? Mark for Review
(1) Points

A procedure that is invoked when the Run button is clicked.

A procedure that is used to make a scene adjustment. (*)

A procedure that is dragged into the code editor.

A procedure that is used to launch the program.

Correct

Section 3

26. Which of the following Java syntax is used to correctly create a Duke subclass? Mark for Review
(1) Points

private Dog extends World

public class Dog extends World

public class Duke extends Animal (*)

private class extends Actor

private class extends Duke

Correct

27. In Greenfoot, a subclass is a specialization of a superclass. True or false? Mark for Review
(1) Points

True (*)

False

Correct

28. From your Greenfoot lessons, source code is written in the code editor. True or false? Mark for Review
(1) Points

True (*)

False

Correct

29. In Greenfoot, a variable can be saved and accessed later, even if the instance no longer exists. True or false? Mark for Review
(1) Points

True

False (*)

Correct


turn(18); Mark for Review
(1) Points





Correct

Section 3

31. In the Greenfoot IDE, which of the following are components of a parameter? Mark for Review
(1) Points


Parameter type (*)

Parameter return

Parameter name (*)

Parameter method

Parameter void


32. From your Greenfoot lessons, abstraction techniques can only be used once in a class's source code. True or false? Mark for Review
(1) Points

True

False (*)

Correct

33. From your Greenfoot lessons, which of the following are examples of abstraction? Mark for Review
(1) Points


Playing a range of sounds when keyboard keys are pressed. (*)

A single instance displays a single image.

Assigning a different keyboard key to each instance. (*)

Programming a single movement for a single instance.

Assigning a different image file to each instance. (*)


34. Greenfoot does not have tools to record sound. True or false? Mark for Review
(1) Points

True

False (*)

Correct

35. What type of parameter does the Greenfoot playSound method expect? Mark for Review
(1) Points

name of a sound file (as String) (*)

name of an integer (as int)

name of a keyboard key (as String)

name of the class (as String)


Section 3

36. From your Greenfoot lessons, which line of code is missing something?

Mark for Review
(1) Points

1

3 (*)

4

5

6


37. From your Greenfoot lessons, which of the following is an example of changing test data during a Q/A test cycle? Mark for Review
(1) Points

Use a different operating system.

Use the mouse instead of the keyboard.

Use symbols instead of numbers. (*)

All of the above.


38. From your Greenfoot lessons, dot notation allows you to use a method from a different class, if the class you are programming does not possess the method. True or false? Mark for Review
(1) Points

True (*)

False

Correct

39. Use you Greenfoot knowledge: What range of numbers does the following method return?

Greenfoot.getRandomNumber(30) Mark for Review
(1) Points

A random number between 1 and 30.


A random number between 0 and 29. (*)



40. From your Greenfoot lessons, classes can only use the methods they have inherited. They cannot use methods from other classes. True or false? Mark for Review
(1) Points

True

False (*)

Correct

Section 3

41. From your Greenfoot lessons, a problem statement defines the purpose for your game. True or false? Mark for Review
(1) Points

True (*)

False

Correct

42. Use your Greenfoot knowledge: An array object holds a single variable. True or false? Mark for Review
(1) Points

True

False (*)

Correct

43. In Greenfoot, a local variable is declared at the beginning of a class. True or false? Mark for Review
(1) Points

True

False (*)


44. From your Greenfoot lessons, which of the following logic operators represents "and"? Mark for Review
(1) Points

&

&& (*)

=

!

Correct

45. Use your Greenfoot knowledge to answer the question. One reason to write a defined method in a class is to change the behavior of the class. True or false? Mark for Review
(1) Points

True (*)

False

Correct

Section 3

46. To execute a method in your Greenfoot game, where is it called from? Mark for Review
(1) Points

The world

The act method (*)

The actor class

The gallery

Correct

47. In Greenfoot, a way to have all subclasses of a superclass inherit a method is by adding the method to the superclass. True or false? Mark for Review
(1) Points

True (*)

False

Correct

48. We can use the Actor constructor to automatically create Actor instances when the Greenfoot world is initialized. True or false? Mark for Review
(1) Points

True

False (*)


49. Use your Greenfoot knowledge to answer the question: Where are defined variables typically entered in a class's source code? Mark for Review
(1) Points

In the defined method in the source code.

Between the constructors and methods in the source code.

After the constructors and methods in the source code.

At the top of the source code, before the constructors and methods. (*)

Correct

50. In Greenfoot, we can use the act method in the class to automatically create the Actor instances when the world is initialized. True or false? Mark for Review
(1) Points

True

False (*)

Correct

MIDTERM

1. Examinethefollowing code. What are thevariables?

args

n (*)

i (*)

t

2. In Java, whichsymbolisusedtoassignonevaluetoanother?

<

>

= (*)

//

3. Alice usesbuilt-inmathoperators; they are:

Addandsubtract

Multiplyand divide

All of theabove (*)

None of theabove

4. In Alice, functions are draggedintothe control statement, nottheprocedure. True or false?
True False (*)

5. Fromyour Alice lessons, whereshouldcommentsbeplaced?

Aboveeach set of programmingstatements. (*)

At the end of the program.

In the scene editor.

In theirownprocedure.

6. An Alice objectcanmove in fourdirections. True or false?

True False (*)

7. Fromyour Alice lessons, comments do notaffectthefunctionality or behavior of objects. True or false?
True (*) False

8. In Alice, inheritancemeansthatthesuperclassinheritsitstraitsfromthesubclass. True or false?
True False (*)

9. In Alice, declaring a newproceduretoshorten code andmake it easiertoreadis a procedural abstractiontechnique. True or false

True (*) False

10. In Alice, a personobjectinheritsitsprocedures, functions, andpropertiesfromwhich of thefollowingclasses
Objectsubclass

Biped class (*)

Quadrupedclass

Personsubclass (*)

11. A scenariogivesthe Alice animation a purpose. True or false
True (*) False

12. Fromyour Alice lessons, randomnumbers are set in thedistanceanddurationarguments in a procedure. True or false
True (*) False

13. In Alice, which of thefollowinginstructions turn the Blue Tangfishrightone half of a meter?

this.blueTang turn Right 5

this.blueTang turn Right 0.5 (*)

blueTang turn Right 5

blueTang turn Right 0.5

14. The moveproceduremoves an object in howmanydifferentpossibledirections

1

4

3

6 (*)

15. A loopcanbe infinite (continue forever) or conditional (stopsupon a condition). True or false?
True (*) False

16. In Alice, weusetheWhile control statementtoimplementtheconditionalloop. True or false?
True (*) False

17. A conditionalloopis a loopthatwill continue forever. True or false?
True False (*)

18. The valuethat a variableholds must be a wholenumber, not a decimal. True or false?
True False (*)

19. Fromyour Alice lessons, whatcanbeused as a guidelinetoensureyouranimationfulfillsanimationprinciples
The Internet

Animationchecklist (*)

A closefriend

None of theabove

20. An Alice event isconsideredwhat?

A party with at least 20 people

An object'sorientation

Errorhandling

A keystroke or mouse click (*)
21. Besidesinvoking a procedure, anotherwaytopreciselyposition an Alice objectistoentervalues in the x, y, and z coordinates in thePositionproperty. True or false
True (*) False

22. Fromyour Alice lessons, whatis a one-shot procedural method?

A procedurethatisinvokedwhentheRunbuttonisclicked.

A procedurethatisusedtomake a scene adjustment. (*)

A procedurethatisdraggedintothe code editor.

A procedurethatisusedtolaunchthe program.

23. Fromyour Alice lessons, how do youadd an instanceto a scene in Alice?
Select theinstancefromyourcomputer'snetwork.

Write code thatplacestheinstance in the scene.

Select theclass, then drag theobjectintothe scene. (*)

CalltheaddObjectmethod.

24. Whenyouwant specific code tobeexecutedonlyifcertainconditions are met, whattype of Java construct wouldyouuse
whileloop

if (*)

array

boolean

25. What do lines 7, 10 and 13 do in thefollowing code?

Export filescalled A, B, and num3.

Create a single file containing A, B, andthevalue of num3.

Print "A", "B" andthevalue of num3 on thescreen. (*)

None of theabove.

26. FromyourGreenfootlessons, abstractiontechniquescanonlybeusedonce in a class'ssource code. True or false?
True False (*)

27. FromyourGreenfootlessons, which of thefollowing are examples of abstraction?

Playing a range of soundswhenkeyboardkeys are pressed. (*)

A single instancedisplays a single image.

Assigning a differentkeyboardkeytoeachinstance. (*)

Programming a single movement for a single instance.

Assigning a differentimage file toeachinstance. (*)

28. In Greenfoot, a constructor has a voidreturntype. True or false
True False (*)

29. FromyourGreenfootlessons, whatistheparameter of thefollowing constructor thatcreates a newimage, anddesignates it tothe Actor class?

setImage (newGreenfootImage("duke100.png

setImage

GreenfootImage

duke100.png (*)

new

30. UseyourGreenfootknowledgetoanswerthequestion: Where are definedvariablestypicallyentered in a class'ssource code
In thedefinedmethod in thesource code.

Betweentheconstructorsandmethods in thesource code.

Aftertheconstructorsandmethods in thesource code.

At the top of thesource code, beforetheconstructorsandmethods. (*)
31. In Greenfoot, a variablecanbesavedandaccessedlater, eveniftheinstance no longerexists. True or false ?
True False (*)

32. FromyourGreenfootlessons, when a methodneedsadditional data toperform a task, this data comesfromparameters. True or false?
True (*) False

33. In theGreenfoot IDE, whichtype of variableallowsinstancestostoreinformation

Methodvariable

Instancevariable (*)

Classvariable

World variable

34. FromyourGreenfootlessons, how do youcall a definedmethod?
Callthemethodfromthe act method. (*)

Callthemethodfromthedefinedmethod.

Writethemethod in the World superclass.

Writethemethod in theinstance.

Writethemethod in thesource code.

35. To execute a method in yourGreenfoot game, whereis it calledfrom?
The world

The act method (*)

The actor class

The gallery

36. FromyourGreenfootlessons, tosavespace in the act method, youcanwrite an entirelynewmethodbelow it, called a _____________.
Classmethod

Instancemethod

Definedmethod (*)

World method

Code method

37. Whichmethodisusedto play sound in yourGreenfoot game

getSoundmethod

findSoundmethod

playSoundmethod (*)

importSoundmethod

38. In Greenfoot, whichmethodchecksif a key on thekeyboardhasbeenpressed
keyPressmethod

keyUpmethod

keyDownmethod (*)

keyClickmethod

39. In theGreenfoot IDE, whatsymbols indicate thatthevariableis an array?
Square brackets [ ] (*)

Curlybrackets { }

Semicolon ;

Colon :

40. In Greenfoot, which of thefollowingstatementscouldprevent an infinite loopfromoccurring?
I = 100 + i

i=1

i = i

i = i + 1 (*)

41. In Greenfoot, whathappensifthe end to a whileloopisn'testablished?
The code willkeepexecutingandwillnever stop. (*)

The code will execute onceandthen stop, duetocontrols in Greenfoot.

The code will prompt youtoenter a loopcounter.

The code willnot execute.

42. In Greenfoot, in whichprogramming task are theobjectsidentified
Definethe problem.

Design thesolution.

Program thesolution. (*)

Test thesolution.

43. UseyourGreenfootskillstoanswerthequestion. Whatisincorrect in this code?

Spacingmissing

Curly brace missing

Parenthesismissing (*)

Commamissing

44. FromyourGreenfootlessons, a problem statementdefinesthepurpose for your game. True or false
True (*) False

45. FromyourGreenfootlessons, where do youreview a class'sinheritedmethods

Act method

Documentation (*)

Inspector

If-statement

46. FromyourGreenfootlessons, theresetbuttonresetsthescenario back toitsinitialposition. True or false?

True (*) False

47. Which of thefollowing Java syntaxisusedtocorrectly create a Duke subclass

private Dog extends World

public class Dog extends World

public class Duke extends Animal (*)

private classextends Actor

private classextends Duke

48. When a Greenfoot code segment isexecuted in an if-statement, each line of code isexecuted in sequentialorder. True or false? True (*) False

49. In a Greenfootif-elsestatement, iftheconditionistrue, theif-statementisexecuted, andthentheelse-statementisexecuted. True or false
True False (*)

50. Readthefollowingmethodsignature. UsingyourGreenfootexperience, whatdoesthismethod do?

public static intgetRandomNumber (intlimit)
Returns a randomnumberlessthan 10.

Returns a random coordinate position in theworld.

Returns a randomnumberbetween zero andparameterlimit. (*)

Returns a randomnumber for instances in the animal classonly.

MIDTERM 01

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