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Test: Java Fundamentals Midterm ExamReview your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer.

Section 2(Answer all questions in this section)

1.

The first step to using a top-down approach to programming is to create a table to align the storyboard steps to the programming instructions. True or false?

Mark for Review (1) Points

True

False (*)

Incorrect. Refer to Section 2 Lesson 4.

2.

In Alice, the procedures' arguments allow the programmer to adjust the object, motion, distance amount, and time duration. True or false?


True (*)

False

Correct

3.

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


4.

In Alice, a computer program requires functions to tell it how to perform the procedure. True or false?


True

False (*)

Correct

5Which 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.


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6. When you want specific code to be executed only if certain conditions are met, what type of Java construct would you use?


while loop

if (*)

array

boolean

Correct

7. From your Alice lessons, if you examined a science process that had many steps, which of the following is a way that you could apply functional decomposition to this process?


1. Present the problem as an animation. 2. Further refine and define the tasks needed for each high level step. 3. Identify the high level steps for the science concept.1. Identify the detailed steps for the science concept. 2. Present the problem as an animation.1. Present the problem as an animation.

1. Identify the high level steps for the science concept.2. Further refine and define the tasks needed for each high level step.

3. Present the problem as an animation. (*)

Correct

8. From your Alice lessons, functional decomposition is the process of taking a complex problem or process and growing it into larger parts that are easier to manage. True or false?


True

False (*)

Correct

9. From your Alice lessons, inheritance means that the superclass inherits its traits from the subclass. True or false?


True

False (*)


10. In Alice, objects inherit the characteristics of their:Mark for Review

(1) Points

Code

Project

Class (*)

Program

Correct

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11. In Alice, procedural abstraction is the concept of making code easier to understand and reuse. True or false?


True (*)

False

Correct

12. An Alice event is considered what?Mark for Review

(1) Points

A party with at least 20 people.

An object's orientation.

Error handling.

A keystroke or mouse click. (*)

Correct

13. In Alice, functions are dragged into the control statement, not the procedure. True or false?


True

False (*)

Correct

14. Which of the following is not a relational operator?Mark for Review

(1) Points

<

// (*)

>

=

Correct

15. Which of the following is not a valid arithmetic operator in Java?


+

/

-

*

%

None of the above (*)

3x3=9 (*)

None of the above


20. In Alice, we can avoid object collision using what?Mark for Review

(1) Points

Slowing movements down.

Using math operators. (*)

Downloading the Alice 3 collision detector app.

Using object detection.

Correct

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21. 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

Correct

22. From your Alice lessons, variables are fixed and cannot be changed. True or false?


True

False (*)

Correct

Section 3

(Answer all questions in this section)

23. What type of parameter does the Greenfoot playSound method expect?


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)

Correct

24. Use your Greenfoot knowledge to answer the question: String concatenation is a way to avoid having to write additional characters in your source code. True or false?


True (*)

False

Correct

25. From your Greenfoot lessons, which symbol represents string concatenation?


Symbol &

Symbol <

Symbol =

Symbol + (*)

Correct

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


&

&& (*)

=

!

Correct

27. From your Greenfoot lessons, what types of values cannot be stored in a local variable?


(Choose all correct answers)

Class name

Objects

Integers

World name

method (*)

Correct

28. From your Greenfoot lessons, which of the following is not a step to creating a new subclass?


Right-click on a superclass.

Click New subclass...

Name the class.

Select an image for the class.

Program the class to move forward. (*)

Correct

29. In Greenfoot, you must first create an instance before you create a class. True or false?


True

False (*)


30. From your Greenfoot lessons, how do you test that your code does not contain bugs?


Write the code.

Inspect the instances.

Review the documentation.

Compile the code. (*)

Correct

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31. From your Greenfoot lessons, a problem statement defines the purpose for your game. True or false?


True (*)

False

Correct

32. From your Greenfoot lessons, what can methods belong to?Mark for Review

(1) Points


Galleries

Classes (*)

Scenarios

Objects (*)

All of the above

Correct

33. From your Greenfoot lessons, which programming statement creates a new Duke object, and places it at x = 120, y = 100 in the world?


addObject (new Duke( ), 120, 100); (*)

addClass (new Duke( ), 120, 100);

addWorld (new Duke( ), 120, 100);

Move(120,100);

Correct

34. 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?


True (*)

False

Correct

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

Greenfoot.getRandomNumber(30)


A random number between 1 and 30.


A random number between 0 and 29. (*)


Correct

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36. From your Greenfoot lessons, which of the following are examples of abstraction?



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. (*)


37. From your Greenfoot lessons, which of the following is an example of a type of data passed through a parameter?


Methods

Classes

Integers (*)

Scenarios

Correct

38. From your Greenfoot lessons, which of the following are properties of an instance?


Size

Color

Image file

Methods

All of the above (*)

Correct

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


Position

Inherited methods

Scenario name (*)

Defined methods

Correct

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

void turnLeft()


()

void

turnLeft (*)

Left


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41. From your Greenfoot lessons, if the condition in an if-statement is true, the first code segment is executed. True or false?


True (*)

False

Correct

42. From your Greenfoot lessons, which of the following methods return the current rotation of the object?


World getClass()

World getWorld()

int getRotation() (*)

getXY()

Correct

43. 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.

Correct

44. 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

Correct

45. In Greenfoot, a constructor has a void return type. True or false?


True

False (*)


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46.

In Greenfoot, which method is used to add a new instance to a scenario when the world is initialized?

Mark for Review

(1) Points

addClass

addWorld

addObject (*)

addInstance


47.

Greenfoot Actor instances get their images from which of the following?

Mark for Review

(1) Points

Their class (*)

Their source code

Their image editor

Their methods


48.

In Greenfoot, the image below is an example of what construct?Mark for Review

(1) Points

Method

Conditional (*)

Variable Assignment

Class

Correct

49.

In Greenfoot, dot notation is used to call a _____________ from another class.

Mark for Review

(1) Points

Method (*)

Class

Signature

Parameter

Correct

50.

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

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