1.4 Game0110r review  (Page 3/3)

True or False?

Answer 29

What is the meaning of the following two images?

This image was inserted here simply to insert some space between the questions and the answers to keep them from being visible on the screen at thesame time.

This image was also inserted for the purpose of inserting space between the questions and the answers.

Answers

Answer 29

True

Back to Question 29

Answer 28

True. One example is the graphical addition of vectors using the tail-to-head placement.

Back to Question 28

Answer 27

True, because according to Kjell, a vector doesn't have a position. Hence, there is nothing in the underlying data for a GM2D02.Vector object that specifies a position.

Back to Question 27

Answer 26

False. The draw method of the GM2D02.Vector class requires two parameters:

• A reference to the off-screen graphics context
  • on which the visual manifestation of the vector will be drawn.
• A reference to an object of the class GM2D02.Point
  • that will be used to determine the position on the off-screen image in which the visual manifestation will appear.

Back to Question 26

Answer 25

True

Back to Question 25

Answer 24

False. An object of type Ellipse2D.Double represents an ellipse that is bounded by the four sides of a rectangle. If the rectangle is square, theellipse becomes a circle .

Back to Question 24

Answer 23

True

Back to Question 23

Answer 22

True

Back to Question 22

Answer 21

False. One of the hallmarks of object-oriented programming is that objects do know how to do useful things for themselves.

Back to Question 21

Answer 20

False. The Line2D.Double class is a member of the standard Java library, whereas the GM2D02.Line class is a member of the special game math library named GM2D02 .

Back to Question 20

Answer 19

True

Back to Question 19

Answer 18

False. A call to the draw method of the GM2D02.Line class causes an object of the standard Java Line2D.Double class to be rendered onto the specified graphics context.

Back to Question 18

Answer 17

True

Back to Question 17

Answer 16

True

Back to Question 16

Answer 15

True

Back to Question 15

Answer 14

False. The returned value of the createImage method is type Image .

Back to Question 14

Answer 13

True

Back to Question 13

Answer 12

True

Back to Question 12

Answer 11

True

Back to Question 11

Answer 10

H. All of the above

Back to Question 10

Answer 9

True

Back to Question 9

Answer 8

False. All Java parameters are passed to methods by value.

Back to Question 8

Answer 7

A. An underlying data object

Back to Question 7

Answer 6

False. GM2D02.Vector objects represent themselves as lines with small circles at their heads in a graphics context for the benefit of humanobservers.

Back to Question 6

Answer 5

False. GM2D02.Point objects represent themselves as small black circles in a graphics context for the benefit of human observers.

Back to Question 5

Answer 4

True

Back to Question 4

Answer 3

False. A point is simply a location in space. It has no width, depth, or height. Therefore, it cannot be seen by the human eye, which means that we can'tdraw a point on the computer screen. However, it is possible to draw an object on the computer screen that indicates the location of the point.

Back to Question 3

Answer 2

False. Points in space exist regardless of whether or not visual objects are created to mark the locations of the points.

Back to Question 2

Answer 1

True

Back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

-end-