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Question: question 1 an objects properties are also known as what...

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Question 1

An object's properties are also known as what?

methods
instance variables
orientations
messages
class variables

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Question 2

What is another name for an object?

a method
a variable
a data type
an instance of a class
a gadget

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Question 3

Which of the following is the name of an instance variable in the CSC142Point class provided in this week's samples?

private
double
x
xCoord
Point

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Question 4 

How many constructors are defined in the CSC142Point class provided in this week's examples?

3
2
1
0

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Question 5 

Which of the following is the name of a query method in the CSC142Point class in this week's examples?

Point
double
distance
diffX
public

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Question 6 

Which of the following is the name of a mutator (update) method in the CSC142Point class in this week's examples?

getX
setPoint
void
public
newX

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Question 7 

Which method in the CSC142Point class returns a reference to a new CSC142Point object?

setX()
getX()
setPoint()
midPoint()
toString()

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Question 8 

Which of the following statements is FALSE?

A private method may be called from anywhere within the class in which it is declared.
A public attribute may be examined from anywhere in the program, but may not be changed.
The keyword void indicates that a method does not return any value.

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Question 9 

Which of the following things does this statement do?

Color darkBrown = new Color( 120, 160, 0 );

declare a new variable
construct a new object
create a binding
All of the above
None of the above

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Question 10 

An object diagram represents what?

the makeup of a class
the state of memory at a particular point during the execution of a program
the collection of all possible objects
the same thing as a flowchart

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Question 11 

When drawing an object diagram, you evaluate a series of program statements to figure out how they change the contents of memory. Which of the following is a question you should ask as you evaluate each line of code?

Does the line of code declare a variable?
Does the line of code instantiate an object?
Does the line of code create a binding?
All of the above
None of the above

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Question 12 

Which of the following valid statements declares a variable?
/* 1 */ Oval dot = new Oval();
/* 2 */ dot.setColor( new Color( 0, 0, 255 ) );
/* 3 */ dot.setFilled();
/* 4 */ Oval circle;
/* 5 */ circle = dot;

1
1 and 2
1 and 4
1, 4 and 5
None of the above

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Question 13 

Which of the following valid statements creates (constructs) an object? [Read very carefully!]
/* 1 */ Oval dot = new Oval();
/* 2 */ dot.setColor( new Color( 0, 0, 255 ) );
/* 3 */ dot.setFilled();
/* 4 */ Oval circle;
/* 5 */ circle = dot;

1
1 and 2
1 and 4
1, 4 and 5
None of the above

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Question 14 

Which of the following valid statements creates a binding (assigns a value to a variable)?
/* 1 */ Oval dot = new Oval();
/* 2 */ dot.setColor( new Color( 0, 0, 255 ) );
/* 3 */ dot.setFilled();
/* 4 */ Oval circle;
/* 5 */ circle = dot;

1
1 and 4
1 and 5
1, 2, 3 and 5
None of the above

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Question 15 

Which of the following valid statements creates an alias?
/* 1 */ Oval dot = new Oval();
/* 2 */ dot.setColor( new Color( 0, 0, 255 ) );
/* 3 */ dot.setFilled();
/* 4 */ Oval circle;
/* 5 */ circle = dot;

1
2
3
4
5

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Question 16 

What is an orphaned object?

an object with no methods
an object which has no references to it
a temporary variable bound to an object
an object with no state

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Question 17 

What are the different views of a class?

  1. Source code
  2. UML Class Diagram
  3. Javadoc comments
I
I & II
II & III
I, II, & III

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Question 18 

What does the keyword 'this' refer to when used in a statement in code?

the program in which the statement exists
the class in which the statement is located
the particular object executing the statement
the method in which the statement is located
None of the above

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Question 19 

Which of the following is the name of the client class; in this code?

public class Marge {
 public Crayon favorite() {
 Crayon fav = new Crayon();
 return fav;
 }
}
public
Crayon
Marge
favorite
generateCrayon

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Question 20 

Which is an access modifier?

public
new
this
String
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