(1) Points
move(2);
move(): (*)
turn(25);
turn(2);
2. In Greenfoot, the move method expects what type of information in its parameters? Mark for Review
(1) Points
Degrees to turn
True or false response
Integer of steps to move forward (*)
String statement
3. In Greenfoot, the body of the method is located in between which of the following characters? Mark for Review
(1) Points
Square brackets [ ]
Curly brackets { } (*)
Asterisks **
Parnetheses ( )
4. In Greenfoot, the turn method expects what type of information in its parameters? Mark for Review
(1) Points
String statement
Degrees to turn (*)
Parameter void
True or false response
Integer of steps to move forward
5. An instance variable can be saved and accessed later, even if the instance no longer exists. True or false? Mark for Review
(1) Points
True
False (*)
6. In Greenfoot, which of the following methods return the world that the instance lives in? Mark for Review
(1) Points
World getWorld() (*)
World getClass()
getXY()
getRotation()
7. An if-statement requires which type of information returned from the condition? Mark for Review
(1) Points
Method
Action
True or false (*)
Integer
8. In Greenfoot, the class holds the general attributes of an instance, such as the methods it inherits. True or false? Mark for Review
(1) Points
True (*)
False
9. In Greenfoot, after a subclass is created, what has to occur before instances can be added to the scenario? Mark for Review
(1) Points
Editing of source code
Compilation (*)
Creation of source code
Creation of an instance
10. In Greenfoot, a subclass is a specialization of a superclass. True or false? Mark for Review
(1) Points
True (*)
False
11. In Greenfoot, what happens to an instance when the Act button is clicked in the environment? Mark for Review
(1) Points
Only one instance moves until the pause button is clicked.
The instance executes all of the programming statements in their class's act method once. (*)
The class executes all of the programming statements in their instance's act method two times until the scenario is stopped.
The instance executes all of the programming statements in their class's act method two times until the scenario is stopped.
The instance executes all of the programming statements in their class's act method repeatedly until the scenario is stopped.
12. 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
13. 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
14. From your Greenfoot lessons, which type of constructor can be used to automate creation of Actor instances? Mark for Review
(1) Points
World (*)
Vector
Actor
Animal
15. The first step to executing an if-else statement is to:____________. Mark for Review
(1) Points
Evaluate the class
Evaluate the condition (*)
Execute the if statement
Execute the else statement
1. Which actor method is used to detect a simple collision? Mark for Review
(1) Points
isTouching() (*)
isCollision()
isInContactWith()
hasCollided()
hasTouched()
2. In Greenfoot, defined methods must be used immediately. True or false? Mark for Review
(1) Points
True
False (*)
3. Which one of the following can be used to detect when 2 actors collide? Mark for Review
(1) Points
isTouching() (*)
isCollision()
hasCollided()
isContact()
4. In Greenfoot when you use the method to retrieve input from the user, the scenario will continue to run in the background? Mark for Review
(1) Points
True
False (*)
5. Greenfoot has tools to record sound. True or false? Mark for Review
(1) Points
True (*)
False
6. What type of parameter does the keyDown method expect? Mark for Review
(1) Points
The name of the class that will use the key.
The name of the sound file to play when the key is pressed.
The password that will protect the class.
The name of the key to press on the keyboard. (*)
7. In Greenfoot the showText() method belongs to which class? Mark for Review
(1) Points
There is no such method.
Actor
Greenfoot
World (*)
8. 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
After the constructors and methods in the source code.
At the top of the source code, before the constructors and methods. (*)
Between the constructors and methods in the source code.
In the defined method in the source code.
9. Where can we review the available classes and methods in Greenfoot, including the stop method? Mark for Review
(1) Points
Greenfoot Application Programmers' Interface (API) (*)
Class menu
Object menu
Class Application Programmers' Interface (API)
10. In Java what is casting? Mark for Review
(1) Points
Casting is when we remove an object from the world
Casting is when we want to tell the java compiler that a class we are accessing is really another type of class (*)
Casting is when we reset the state of an instance.
Casting is when we change the coordinates of an actor
11. Use your Greenfoot knowldege: If an Actor class Fly has a variable defined to store the current speed, which of the following statements would successfully add a Fly and define the current speed as 2? Mark for Review
(1) Points
addObject (new Fly(), 2, 150, 150);
addObject (new Fly(), 150, 150);
addObject (new Fly(2, 90), 150, 150);
addObject (new Fly(2), 150, 150); (*)
12. Use your Greenfoot knowldege: Abstraction occurs in many different ways in programming. True or false? Mark for Review
(1) Points
True (*)
False
13. In Greenfoot, which statement is a correct example of string concatenation? Mark for Review
(1) Points
bee.setImage("bee" + i + ".png"); (*)
bee.setImage("bee.png");
Bee bee = new Bee(image1);
bee.setImage("bee" - "I" - ".png");
14. From your Greenfoot lessons, which symbol represents string concatenation? Mark for Review
(1) Points
Symbol =
Symbol &
Symbol + (*)
Symbol <
15. From your Greenfoot lessons, when do infinite loops occur? Mark for Review
(1) Points
When the end to the act method isn't established.
Only in while loops.
When the end to the code isn't established. (*)
When the loop is executed.
1. From your Greenfoot lessons, how do you call a defined method? Mark for Review
(1) Points
Write the method in the Actor class.
Call the method from the act method. (*)
Write the method in the World superclass.
Write the method in the documentation.
Write the method in the instance.
2. Which one of the following can be used to detect when 2 actors collide? Mark for Review
(1) Points
isContact()
hasCollided()
isCollision()
isTouching() (*)
3. Which actor method is used to detect a simple collision? Mark for Review
(1) Points
hasTouched()
hasCollided()
isCollision()
isInContactWith()
isTouching() (*)
4. Greenfoot has tools to record sound. True or false? Mark for Review
(1) Points
True (*)
False
5. In Greenfoot, what type of parameter does the isKeyDown method expect? Mark for Review
(1) Points
Method
Integer
Boolean
String (*)
6. In Greenfoot when you use the method to retrieve input from the user, the scenario will continue to run in the background? Mark for Review
(1) Points
True
False (*)
7. In Greenfoot, a defined variable is a variable that is defined in an instance. True or false? Mark for Review
(1) Points
True
False (*)
8. 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
9. Which of the following answers have the correct syntax for declaring a class variable in Greenfoot? Mark for Review
(1) Points
(Choose all correct answers)
private variable-type variable-name; (*)
public variable-type variable-name; (*)
private variable-name, variable-type;
public variable-name variable type;
10. In Greenfoot modifying an actors constructor to accept an initial speed is a form of abstraction? Mark for Review
(1) Points
True (*)
False
11. In Greenfoot, you will never have to cast as we only ever use 2 classes - World and Actor. Mark for Review
(1) Points
True
False (*)
12. From your Greenfoot lessons, which one of the following is an example of when an abstraction technique is used? Mark for Review
(1) Points
Initialising a variable
Adding a property to an instance
Passing a paramater in a constructor to set an initial speed. (*)
Adding a property to a Class
13. Which of the following Greenfoot logic operators represents "not"? Mark for Review
(1) Points
&&
&
=
! (*)
14. In Greenfoot, which statement is a correct example of string concatenation? Mark for Review
(1) Points
bee.setImage("bee.png");
Bee bee = new Bee(image1);
bee.setImage("bee" + i + ".png"); (*)
bee.setImage("bee" - "I" - ".png");
15. How would the following sentence be written in Greenfoot source code? If Bee is turning, and the keyboard key "d" is down... Mark for Review
(1) Points
if (isTurning && Greenfoot.isKeyDown("d") ) (*)
if (!isTurning && Greenfoot.isKeyDown("d") )
if (&&isTurning ! Greenfoot.isKeyDown("d") )
if (!Greenfoot.isKeyDown && isTurning("d") )
1. In reference to Greenfoot, if the following method was defined in a superclass,
public void turnAtEdge(){
...
}
all subclasses of the superclass will inherit the method.
True or false? Mark for Review
(1) Points
True (*)
False
2. In Greenfoot a collision is when 2 actors touch? Mark for Review
(1) Points
True (*)
False
3. Defined methods are methods that are only created by the Greenfoot development team? Mark for Review
(1) Points
True
False (*)
4. Greenfoot has tools to record sound. True or false? Mark for Review
(1) Points
True (*)
False
5. In Greenfoot, which method checks if a key on the keyboard has been pressed? Mark for Review
(1) Points
keyPress method
isKeyDown method (*)
isKeyUp method
keyClick method
6. From your Greenfoot lessons, the isKeyDown method is located in which class? Mark for Review
(1) Points
Greenfoot (*)
GreenfootImage
World
Actor
7. In Greenfoot, the == operator is used to test if two values are equal. True or false? Mark for Review
(1) Points
True (*)
False
8. In Greenfoot, a constructor has a void return type. True or false? Mark for Review
(1) Points
True
False (*)
9. Which class holds the method that ends a Greenfoot game? Mark for Review
(1) Points
Greenfoot (*)
GreenfootImage
Class
Actor
10. Abstraction occurs in many different ways in programming. True or false? Mark for Review
(1) Points
True (*)
False
11. In Java what is casting? Mark for Review
(1) Points
When you remove an object instance.
When you reset an object instance.
When you take an Object of one particular type and turn it into another Object type. (*)
Casting is not possible in Java.
12. From your Greenfoot lessons, which one of the following is an example of when an abstraction technique is used? Mark for Review
(1) Points
Adding a property to an instance
Adding a property to a Class
Initialising a variable
Passing a paramater in a constructor to set an initial speed. (*)
13. In Greenfoot, what is a common letter used for the loop variable? Mark for Review
(1) Points
A
I (*)
X
Y
14. In the Greenfoot IDE, what does the AND operator (&&) do? Mark for Review
(1) Points
Compares two boolean variables or expressions and returns a result that is true if either of its operands are true.
Compares two boolean values, and returns a boolean value which is true if and only if both of its operands are true. (*)
Compares two boolean values, and returns a boolean value which is true if and only if one of its operands are true.
Compares two boolean values and returns a boolean value which is true if either one of the operands is true.
15. In Greenfoot, string concatenation reduces the number of redundant characters or phrases you need to type into each array. True or false? Mark for Review
(1) Points
True (*)
False
1. In Greenfoot, defined methods must be used immediately. True or false? Mark for Review
(1) Points
True
False (*)
2. Use your Greenfoot knowledge to answer the question. One reason to write a defined method in a class is to make it easier to read. True or false? Mark for Review
(1) Points
True (*)
False
3. 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
4. In Greenfoot, what type of parameter does the isKeyDown method expect? Mark for Review
(1) Points
Integer
String (*)
Method
Boolean
5. In Greenfoot, which method checks if a key on the keyboard has been pressed? Mark for Review
(1) Points
keyClick method
keyPress method
isKeyUp method
isKeyDown method (*)
6. What type of parameter does the keyDown method expect? Mark for Review
(1) Points
The name of the key to press on the keyboard. (*)
The password that will protect the class.
The name of the sound file to play when the key is pressed.
The name of the class that will use the key.
7. 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
8. The GreenfootImage class enables Greenfoot actors to maintain their visible image by holding an object of type GreenfootImage. True or false? Mark for Review
(1) Points
True (*)
False
9. In Greenfoot, what is the purpose of the variable type? Mark for Review
(1) Points
Defines the access specifier used with the variable.
Defines the instance that the variable is associated with.
Defines which class the variable is associated with.
Defines what kind of data to store in the variable. (*)
10. In Greenfoot, you will never have to cast as we only ever use 2 classes - World and Actor. Mark for Review
(1) Points
True
False (*)
11. In Java what is casting? Mark for Review
(1) Points
When you take an Object of one particular type and turn it into another Object type. (*)
Casting is not possible in Java.
When you remove an object instance.
When you reset an object instance.
12. Use your Greenfoot knowldege: If an Actor class Fly has a variable defined to store the current speed, which of the following statements would successfully add a Fly and define the current speed as 2? Mark for Review
(1) Points
addObject (new Fly(), 2, 150, 150);
addObject (new Fly(2, 90), 150, 150);
addObject (new Fly(2), 150, 150); (*)
addObject (new Fly(), 150, 150);
13. In Greenfoot, what happens if the end to a while loop isn't established? Mark for Review
(1) Points
The code will execute once and then stop, due to controls in Greenfoot.
The code will not execute.
The code will prompt you to enter a loop counter.
The code will keep executing and will never stop. (*)
14. In the Greenfoot IDE, what does the AND operator (&&) do? Mark for Review
(1) Points
Compares two boolean values and returns a boolean value which is true if either one of the operands is true.
Compares two boolean variables or expressions and returns a result that is true if either of its operands are true.
Compares two boolean values, and returns a boolean value which is true if and only if one of its operands are true.
Compares two boolean values, and returns a boolean value which is true if and only if both of its operands are true. (*)
15. If an end to a while loop is not established, what happens? Mark for Review
(1) Points
The code stops after 20 executions.
The code stops after 10 executions.
The condition becomes false after one minute of executions.
The code executes and does not stop. (*)
1. In the Greenfoot IDE, an instance's position is on the x and y coordinates. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
2. In Greenfoot, the body of the method is located in between which of the following characters? Mark for Review
(1) Points
Asterisks **
Parnetheses ( )
Square brackets [ ]
Curly brackets { } (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 2.
3. In Greenfoot, the instance has a source code editor. True or false? Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 2.
4. In Greenfoot, methods can be called in the act method. When the Act button is clicked in the environment, the methods in the method body of the act method are executed. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
5. In Greenfoot, which of the following methods display an object's orientation? Mark for Review
(1) Points
(Choose all correct answers)
int getRotation() (*)
void move()
void turn()
int getX() (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 3.
6. From your Greenfoot lessons, where do you review a class's inherited methods? Mark for Review
(1) Points
Act method
Inspector
If-statement
Documentation (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 3.
7. From your Greenfoot lessons, which of the following is not a step to creating a new subclass? Mark for Review
(1) Points
Click New subclass...
Name the class.
Program the class to move forward. (*)
Right-click on a superclass.
Select an image for the class.
[Incorrect] Incorrect. Refer to Section 3 Lesson 1.
8. An object is an instance of a class. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
9. 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 computer is a subclass of a video game superclass.
A rose is a subclass of the flower superclass. (*)
A single person is a superclass of the human subclass.
[Incorrect] Incorrect. Refer to Section 3 Lesson 1.
10. A subclass has what kind of relationship to a superclass? Mark for Review
(1) Points
"is-by"
"for-what"
"a-is"
"is-a" (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 1.
11. From your Greenfoot lessons, Which of the following statements is most correct? Mark for Review
(1) Points
My program is complete when I add images to it.
My program is complete when I add music to it.
My program is complete when it runs and I've tested the code. (*)
My program is complete when it compiles.
[Incorrect] Incorrect. Refer to Section 3 Lesson 4.
12. In Greenfoot, which keyword calls the World superclass? Mark for Review
(1) Points
constructor
addObject
super (*)
new
world
[Incorrect] Incorrect. Refer to Section 3 Lesson 5.
13. From your Greenfoot lessons, which axes define an object's position in a world? Mark for Review
(1) Points
(Choose all correct answers)
x (*)
w
y (*)
z
[Incorrect] Incorrect. Refer to Section 3 Lesson 5.
14. Which keyword indicates that Greenfoot needs to create a new object? Mark for Review
(1) Points
newClass
newObject
addObject
new (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 5.
15. The Greenfoot method getRandomNumber is used to create predictable behaviour in your scenario Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 5.
1. From your Greenfoot lessons, to save space in the act method, you can write an entirely new method below it, called a _____________. Mark for Review
(1) Points
Code method
Defined method (*)
World method
Class method
Instance method
[Incorrect] Incorrect. Refer to Section 3 Lesson 6.
2. In Greenfoot, defined methods must be used immediately. True or false? Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 6.
3. Which actor method is used to detect a simple collision? Mark for Review
(1) Points
isTouching() (*)
hasCollided()
isInContactWith()
hasTouched()
isCollision()
[Correct] Correct
4. In Greenfoot, what types of values cannot be stored in a local variable? Mark for Review
(1) Points
World name
Objects
Class name
Method (*)
Integers
[Incorrect] Incorrect. Refer to Section 3 Lesson 10.
5. Which of the following is an example of string concatenation? Mark for Review
(1) Points
Instead of entering ".png" after each image file name, add && ".png" after the imageName value in the programming statement.
Instead of entering ".png" after each image file name, add + ".png" after the imageName value in the programming statement. (*)
Instead of entering ".png" after each image file name, add ".png" after the imageName value in the programming statement.
Instead of entering ".png" after each image file name, add = ".png" after the imageName value in the programming statement.
[Incorrect] Incorrect. Refer to Section 3 Lesson 10.
6. In Greenfoot, string concatenation reduces the number of redundant characters or phrases you need to type into each array. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
7. In Greenfoot what command would you use to detect if a mouse has been clicked on an actor? Mark for Review
(1) Points
Greenfoot.mouseClicked(this) (*)
Greenfoot.pressed(this)
Actor.clicked(this)
Greenfoot.clicked(this)
[Correct] Correct
8. You cannot record unique sounds in Greenfoot. You can only use the sounds that are stored in the Greenfoot library. True or false? Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 7.
9. Greenfoot has tools to record sound. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
10. 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
11. What does the following programming statement mean?
image1 = new GreenfootImage("duke12.png"); Mark for Review
(1) Points
The variable, image1, cannot use the image file, duke12.png.
The image file, duke12.png, has just been drawn and imported into the scenario.
The image file, duke12.png, is assigned to the variable image1. (*)
Image files from 1-119 are associated with image1.
[Incorrect] Incorrect. Refer to Section 3 Lesson 8.
12. 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.
Delete the instance.
Edit the values in the class's act method.
Edit the values in the constructor. (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 8.
13. In Greenfoot, you will never have to cast as we only ever use 2 classes - World and Actor. Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 9.
14. Use your Greenfoot knowldege: Abstraction occurs in many different ways in programming. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
15. In Greenfoot you can only access the methods of the current class? Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 9.
1. In Greenfoot, which of the following methods display an object's orientation? Mark for Review
(1) Points
(Choose all correct answers)
void move()
int getRotation() (*)
int getX() (*)
void turn()
[Incorrect] Incorrect. Refer to Section 3 Lesson 3.
2. In Greenfoot, only 10 methods can be written for each class in the Code editor. True or false? Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 3.
3. The list below displays characteristics of a Greenfoot world constructor, except for one. Which one should be removed? Mark for Review
(1) Points
Has the same name as the name of the class.
Executed automatically when a new instance of the class is created.
Defines the instance's size and resolution.
Has no return type.
Has a void return type. (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 5.
4. From your Greenfoot lessons, which of the following comparison operators represents "greater than"? Mark for Review
(1) Points
<
= =
> (*)
! =
[Incorrect] Incorrect. Refer to Section 3 Lesson 5.
5. Which of the following comparison symbols represents equals? Mark for Review
(1) Points
= = (*)
! =
<
>
[Correct] Correct
6. 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] Correct
7. In Greenfoot, the turn method expects what type of information in its parameters? Mark for Review
(1) Points
Integer of steps to move forward
Degrees to turn (*)
Parameter void
String statement
True or false response
[Incorrect] Incorrect. Refer to Section 3 Lesson 2.
8. In Greenfoot, the body of the method is located in between which of the following characters? Mark for Review
(1) Points
Parnetheses ( )
Square brackets [ ]
Curly brackets { } (*)
Asterisks **
[Incorrect] Incorrect. Refer to Section 3 Lesson 2.
9. In Greenfoot, the move method expects what type of information in its parameters? Mark for Review
(1) Points
Integer of steps to move forward (*)
Degrees to turn
True or false response
String statement
[Correct] Correct
10. In Greenfoot, which of the following options are not possible when associating an image file with an instance? Mark for Review
(1) Points
Add a video (*)
Import an image
Draw an image
Select an image from the Greenfoot library
[Correct] Correct
11. When designing a game in Greenfoot, it helps to define the actions that will take place in a textual storyboard. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
12. A subclass has what kind of relationship to a superclass? Mark for Review
(1) Points
"a-is"
"is-by"
"is-a" (*)
"for-what"
[Incorrect] Incorrect. Refer to Section 3 Lesson 1.
13. In Greenfoot, after a subclass is created and compiled, you cannot edit the subclass's source code. True or false? Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 1.
14. From your Greenfoot lessons, the reset button resets the scenario back to its initial position. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
15. In Greenfoot, after a subclass is created, what has to occur before instances can be added to the scenario? Mark for Review
(1) Points
Creation of an instance
Editing of source code
Compilation (*)
Creation of source code
[Incorrect] Incorrect. Refer to Section 3 Lesson 1.
1. In Greenfoot, which method body correctly adds an instance of the World to a scenario, with size x = 300 y = 300 and a resolution of 2 pixels per cell? Mark for Review
(1) Points
super(300,300,2); (*)
Super(300,300,2);
world(300, 300, 2);
super(2,300,300);
[Correct] Correct
2. In Greenfoot, what is the purpose of the variable type? Mark for Review
(1) Points
Defines what kind of data to store in the variable. (*)
Defines which class the variable is associated with.
Defines the instance that the variable is associated with.
Defines the access specifier used with the variable.
[Correct] Correct
3. What does the following programming statement mean?
image1 = new GreenfootImage("duke12.png"); Mark for Review
(1) Points
The image file, duke12.png, has just been drawn and imported into the scenario.
The image file, duke12.png, is assigned to the variable image1. (*)
The variable, image1, cannot use the image file, duke12.png.
Image files from 1-119 are associated with image1.
[Incorrect] Incorrect. Refer to Section 3 Lesson 8.
4. In Greenfoot, what types of values cannot be stored in a local variable? Mark for Review
(1) Points
Method (*)
Class name
World name
Objects
Integers
[Correct] Correct
5. Which of the following is not a component of a while loop? Mark for Review
(1) Points
while keyword
if statement (*)
Control operator
Loop variable
Local variable
[Incorrect] Incorrect. Refer to Section 3 Lesson 10.
6. From your Greenfoot lessons, what types of values cannot be stored in a local variable? Mark for Review
(1) Points
(Choose all correct answers)
Integers
method (*)
Objects
Class name
World name
[Incorrect] Incorrect. Refer to Section 3 Lesson 10.
7. From your Greenfoot lessons, how do you call a defined method? Mark for Review
(1) Points
Write the method in the instance.
Call the method from the act method. (*)
Write the method in the World superclass.
Write the method in the documentation.
Write the method in the Actor class.
[Incorrect] Incorrect. Refer to Section 3 Lesson 6.
8. Which one of the following can be used to detect when 2 actors collide? Mark for Review
(1) Points
isTouching() (*)
hasCollided()
isCollision()
isContact()
[Correct] Correct
9. Use your Greenfoot knowledge to answer the question. One reason to write a defined method in a class is to make it easier to read. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
10. What type of parameter does the Greenfoot playSound method expect? Mark for Review
(1) Points
name of the class (as String)
name of an integer (as int)
name of a keyboard key (as String)
name of a sound file (as String) (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 7.
11. In Greenfoot, the sound file must be saved in the scenario and written in the source code for it to play. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
12. In Greenfoot, which method would you use to obtain input from the user? Mark for Review
(1) Points
getText()
ask() (*)
getInput()
input()
[Incorrect] Incorrect. Refer to Section 3 Lesson 7.
13. Use your Greenfoot knowldege: If an Actor class Fly has a variable defined to store the current speed, which of the following statements would successfully add a Fly and define the current speed as 2? Mark for Review
(1) Points
addObject (new Fly(), 150, 150);
addObject (new Fly(2, 90), 150, 150);
addObject (new Fly(), 2, 150, 150);
addObject (new Fly(2), 150, 150); (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 9.
14. From your Greenfoot lessons, which one of the following is an example of when an abstraction technique is used? Mark for Review
(1) Points
Adding a property to a Class
Adding a property to an instance
Passing a paramater in a constructor to set an initial speed. (*)
Initialising a variable
[Incorrect] Incorrect. Refer to Section 3 Lesson 9.
15. In Greenfoot, you can cast an Actor class to a World class? Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 9.
1. 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] Correct
2. Which of the following Java syntax is used to correctly create a Bee subclass? Mark for Review
(1) Points
private class extends Bee
public class Bee extends World
private class extends Actor
private Bee extends World
public class Bee extends Animal (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 1.
3. A subclass has what kind of relationship to a superclass? Mark for Review
(1) Points
"is-a" (*)
"is-by"
"a-is"
"for-what"
[Correct] Correct
4. Which of the following demonstrates a Greenfoot subclass/superclass relationship? Mark for Review
(1) Points
A rose is a subclass of the flower superclass. (*)
A computer is a subclass of a video game superclass.
A dog is a subclass of the cat superclass.
A single person is a superclass of the human subclass.
[Correct] Correct
5. From your Greenfoot lessons, what are the ways that you can view a class's methods? Mark for Review
(1) Points
(Choose all correct answers)
In the Greenfoot gallery
In the scenario
By right-clicking on an instance (*)
In the class's documentation (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 3.
6. The list below provides actions you can perform in the Greenfoot code editor except one. Which one should be removed? Mark for Review
(1) Points
Write and edit source code.
Review the online Java Library documentation. (*)
Write and edit comments.
Write source code to tell the class how to act in the scenario.
[Incorrect] Incorrect. Refer to Section 3 Lesson 3.
7. When a program is tested once and it works then testing is complete. Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 4.
8. In Greenfoot, methods can be called in the act method. When the Act button is clicked in the environment, the methods in the method body of the act method are executed. True or false? Mark for Review
(1) Points
True (*)
False
[Correct] Correct
9. In Greenfoot, the body of the method is located in between which of the following characters? Mark for Review
(1) Points
Asterisks **
Parnetheses ( )
Square brackets [ ]
Curly brackets { } (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 2.
10. In Greenfoot, the instance has a source code editor. True or false? Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 2.
11. In Greenfoot, which of the following options are not possible when associating an image file with an instance? Mark for Review
(1) Points
Import an image
Draw an image
Add a video (*)
Select an image from the Greenfoot library
[Incorrect] Incorrect. Refer to Section 3 Lesson 2.
12. Which of the following comparison operators represents "greater than or equal"? Mark for Review
(1) Points
! =
>= (*)
>
= =
[Incorrect] Incorrect. Refer to Section 3 Lesson 5.
13. The list below displays characteristics of a Greenfoot world constructor, except for one. Which one should be removed? Mark for Review
(1) Points
Has no return type.
Has a void return type. (*)
Defines the instance's size and resolution.
Has the same name as the name of the class.
Executed automatically when a new instance of the class is created.
[Incorrect] Incorrect. Refer to Section 3 Lesson 5.
14. In Greenfoot, a semicolon is not necessary at the end of a method that uses dot notation. True or false? Mark for Review
(1) Points
True
False (*)
[Incorrect] Incorrect. Refer to Section 3 Lesson 5.
15. From your Greenfoot lessons, which axes define an object's position in a world? Mark for Review
(1) Points
(Choose all correct answers)
y (*)
z
w
x (*)
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