Java Fundamentals Midterm Exam

Test: Java Fundamentals Midterm Exam

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

Top of Form

Section 2

(Answer all questions in this section)

1.
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

2.
In Alice, if a procedure is declared for a clownFish class, which classes can use the procedure?
Mark for Review
(1) Points

The clownFish class and Swimmer class

ClownFish class (*)

The pajamaFish class, clownFish class, and Swimmer class

Any class with "Fish" in the class name

Correct

3.
From your Alice lessons, which of the following is a tool to show the logic of an animation?
Mark for Review
(1) Points

Visual storyboard

Flowchart (*)

Pie chart

Scene editor

Class chart

Incorrect. Refer to Section 2 Lesson 5.

4.
In Alice, which function is used to move an object directly to the center point of another object?
Mark for Review
(1) Points

getObject

getDuration

getDepth

getDistance (*)


5.
Which of the following statements about what happens when the following code is executed is false?

Mark for Review
(1) Points

The message "Printing Some Text" will be printed until loopVal is no longer less than 5.

The variable loopVal is initialized to 0.

The condition loopVal < 5 is tested after the block is executed. (*)

The condition loopVal < 5 returns a boolean value.

None of the above.

Correct

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6.
If you want one message to display if a user is below the age of 18 and a different message to display if the user is 18 or older, what type of construct would you use?
Mark for Review
(1) Points

for all loop

do loop

while loop

if (*)


7.
The Alice IF control structure requires the false statement to be populated. True or false?
Mark for Review
(1) Points

True

False (*)

Correct

8.
In Alice, Do In Order and Do Together:
Mark for Review
(1) Points

Are move statements

Are control statements (*)

Are complex statements

None of the above

Correct

9.
In Alice, the setVehicle procedure will associate one object to another. True or false?
Mark for Review
(1) Points

True (*)

False


10.
Which of the following actions would require a control statement to control animation timing?
Mark for Review
(1) Points

(Choose all correct answers)

A biped object walking. (*)

A rock object turning.

A fish swimming. (*)

A bird flying. (*)

Incorrect. Refer to Section 2 Lesson 6

11.
In Alice, how is a one-shot procedure different from procedures in the Code editor?
Mark for Review
(1) Points

One-shot procedures are only available for acting objects, while procedures are available for all objects.

One-shot procedures are available in the Code editor, while procedures are available in the Scene editor.

A one-shot procedure executes only one time to re-position the object, while procedures in the Code editor execute every time the Run button is clicked. (*)

All of the above


12.
From your Alice lessons, variables are fixed and cannot be changed. True or false?
Mark for Review
(1) Points

True

False (*)

Correct

13.
Which of the following programming instructions commands the fish to continuously move forward a random speed between 0.5 and 1.0 meters, minus 0.25 meters, until it collides with the shark?
Mark for Review
(1) Points

(*)

Correct

14.
From your Alice lessons, what does the Count control statement do?
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(1) Points

Executes statements a random number of times.

Executes statements simultaneously.

Executes statements a specific number of times. (*)

Executes statements while a condition is true.

Correct

15.
From your Alice lessons, when testing your animation, you should test that comments were added below each sequence of instructions in the code. True or false?
Mark for Review
(1) Points

True

False (*)

Correct

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Section 2


16.
From your Alice lessons, at what point in the animation process do you confirm the items on the "Checklist for Animation Completion"?
Mark for Review
(1) Points

Before designing the animation.

During and after the animation process. (*)

At the beginning of the animation process.

After adding each procedure to the Code editor.

Correct

17.
Debugging and testing is the process of running the animation one time, and adjusting the control statements, procedures, and arguments.
Mark for Review
(1) Points

True

False (*)


18.
From your Alice lessons, complete the following sentence: When coded, an event triggers a ___________.
Mark for Review
(1) Points

Infinite loop

Gallery

Procedure (*)

Scene

Correct

19.
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

20.
In Alice, which of the following programming statements moves the fish forward, the distance to the rock, minus the depth of the rock?
Mark for Review
(1) Points

this.Fish move forward {this.Rock getDistanceTo this.Fish - this.Fish getDepth}

this.Fish move forward {this.Fish getDistanceTo this.Rock - this.Rock getDepth} (*)

this.Fish move forward {this.Rock getDistanceTo this.Fish - this.Fish - 2}

this.Rock move forward {this.Rock getDistanceTo this.Fish - this.Fish - 2}

Correct

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21.
Examine the following code. What are the variables?

Mark for Review
(1) Points


args

n (*)

i (*)

t


22.
Which of the following is not a valid arithmetic operator in Java?
Mark for Review
(1) Points

+

/

-

*

%

None of the above (*)

Correct

Section 3


23.
From your Greenfoot lessons, source code is written in the Code editor. True or false?
Mark for Review
(1) Points

True (*)

False

Correct

24.
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

25.
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 (*)

Incorrect. Refer to Section 3 Lesson 6

26.
From your Greenfoot lessons, how do you call a defined method?
Mark for Review
(1) Points

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.

Correct

27.
Which of the following type of audience should you ask to play your Greenfoot game during the testing phase?
Mark for Review
(1) Points

Testing

Target (*)

Primary

Programmer


28.
From your Greenfoot lessons, a problem statement defines the purpose for your game. True or false?
Mark for Review
(1) Points

True (*)

False

Correct

29.
Using Greenfoot, how do we change the size and resolution of the World instance?
Mark for Review
(1) Points

Edit the methods in the class.

Edit the values in the constructor. (*)

Delete the instance.

Edit the values in the class's act method.

Correct

30.
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 (*)

Correct

31.
Using the Greenfoot IDE, when is a constructor automatically executed?
Mark for Review
(1) Points

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.

Correct

32.
From your Greenfoot lessons, which of the following is an example of a type of data passed through a parameter?
Mark for Review
(1) Points

Methods

Classes

Integers (*)

Scenarios


33.
In Greenfoot, the properties of an instance can be modified in the documentation. True or false?
Mark for Review
(1) Points

True

False (*)


34.
From your Greenfoot lessons, which of the following are properties of an instance?
Mark for Review
(1) Points

Size

Color

Image file

Methods

All of the above (*)


35.
In the following Greenfoot method signature, which is the method name?

void turnLeft()
Mark for Review
(1) Points

()

void

turnLeft (*)

Left

Correct

36.
From your Greenfoot lessons, which of the following is not a characteristic of a static method?
Mark for Review
(1) Points

Belongs to a class itself

Belongs to an instance itself (*)

Available for other classes to use with dot notation

Signature contains the word static

Is a method


37.
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

38.
When a Greenfoot code segment is executed in an if-statement, each line of code is executed in sequential order. True or false?
Mark for Review
(1) Points

True (*)

False

Correct

39.
In Greenfoot, you can use comparison operators to compare a variable to a random number. True or false?
Mark for Review
(1) Points

True (*)

False

Correct

40.
From your Greenfoot lessons, the keyDown method is located in which class?
Mark for Review
(1) Points

Actor

Greenfoot (*)

GreenfootImage

World

Correct

41.
From your Greenfoot lessons, which of the following is not a step to creating a new subclass?
Mark for Review
(1) Points

Right-click on a superclass.

Click New subclass...

Name the class.

Select an image for the class.

Program the class to move forward. (*)


42.
From your Greenfoot lessons, a scenario is a game or simulation implemented in Greenfoot. True or false?
Mark for Review
(1) Points

True (*)

False

Correct

43.
How would the following sentence be written in Greenfoot source code? If Duke's leg is down, and the keyboard key "d" is down...
Mark for Review
(1) Points

if (&&isDown ! Greenfoot.isKeyDown("d") )

if (!isDown && Greenfoot.isKeyDown("d") )

if (isDown && Greenfoot.isKeyDown("d") ) (*)

if (!Greenfoot.isKeyDown && isDown("d") )

Correct

44.
From your Greenfoot lessons, what is a loop?
Mark for Review
(1) Points

A statement that executes one segment of code.

A statement that can execute a section of code multiple times. (*)

A statement that can execute a section of code one time.

A statement that can execute a method multiple times.


45.
From your Greenfoot lessons, when do infinite loops occur?
Mark for Review
(1) Points

When the loop is executed.

Only in while loops.

When the end to the code isn't established. (*)

When the end to the act method isn't established.


Section 3


46.
In the following Greenfoot array, what statement would you write to access the "a" key?

Keynames = {"a", "b", "c", "d"};
Mark for Review
(1) Points

keynames[2]

keynames["a"]

keynames[0] (*)

keynames["a" key]

Correct

47.
From your Greenfoot lessons, which line of code is missing something?

Mark for Review
(1) Points

1

3 (*)

4

5

6

Correct

48.
In Greenfoot, the image below is an example of what construct?

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(1) Points

Method

Comment

Constructor (*)

Class


49.
Use your Greenfoot skills to answer the question. What is incorrect in this code?

Mark for Review
(1) Points

Spacing missing

Curly brace missing

Parenthesis missing (*)

Comma missing

Correct

50.
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. (*)

Correct

Java Fundamentals Midterm Exam

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