Computer Science 455
Instructor: R. P. Burton
First Quiz
January 18-19, 2005

Name _________________________________________ Score ____________/28

1. In the early days of computer graphics, commercial applications typically were
a. low-end (graphs, charts, etc. ) and inexpensive
b. high-end (vehicle design and simulation) and expensive

(b)

2. Common applications of computer graphics to automobiles include all of the following EXCEPT
a. exterior design
b. mechanical component design
c. design for performance and handling
d. driver training
e. crash testing and simulation
f. (no exceptions here)

(f)

3. Computer graphics was used in architecture first of the design of
a. large, commercial structures
b. small, residential structures

(a)

4. The processing of CAT scans (to locate and identify abnormalities, for example) ____ an application of computer graphics.
a. is
b. is not

(b)

5. Following the completion of Sutherland's thesis in the early 1960s, computer graphics experienced widespread commercial adoption _____.
a. almost overnight
b. after approximately 2 years
c. only after several years

(c)

6. Which enjoys more commercial profitability?
a. a motorcycle operation simulator
b. a crane operation simulator

(b)

7. Computer graphics for graphs and charts has been developed to the point where such graphs and charts can be produced and understood by virtually everyone with a college degree.
a. true
b. false

(b)

8. In general, how did the "art" community (animators, designers, etc. ) react to the advent of computer graphics?
a. with awe
b. with indifference
c. with distain

(c)

9. Noninteractive computer animation is limited to the entertainment sector.
a. true
b. false

(b)

10. In terms of present phenomena, computer graphics is, of necessity, limited to
a. observable real-world phenomena
b. observable and abstract real-world phenomena
c. observable and abstract real-world phenomena and hypothesized phenomena

(c)

11. Computer graphics _______ image processing.
a. is a subset of
b. is a superset of
c. is a synonym for
d. is the opposite end of a spectrum from


(d)

12. What is the purpose of a control grid in a CRT?
a. to control the quantity of electrons
b. to focus the beam of electrons
c. to deflect the beam of electrons

(a)

13. A phosphor emits photons
a. while it is being bombarded by a stream of electrons, i. e. it fluoresces
b. after the electron bombardment ceases, i. e. it phosphoresces
c. both (a) and (b)

(c)

14. Refresh rate is most significantly dictated by
a. phosphor persistence
b. the human visual sampling rate

(b)

15. About how large does the frame buffer need to be for a modern1000 x 1000 color display?
a. 1000 bytes
b. 1000 x 1000 bytes
c. 3 x 1000 bytes
d. 3 x 1000 x 1000 bytes

(d)

16. A calligraphic display is at risk of being
a. refreshed too frequently
b. refreshed too infrequently
c. both (a) and (b)
d. neither (a) nor (b)

(c)

17. A raster-scan display is at risk of being
a. refreshed too frequently
b. refreshed too infrequently
c. both (a) and (b)
d. neither (a) nor (b)

(d)

18. The beam penetration CRT was a ______ display.
a. monochrome
b. partial-color
c. full color

(b)

19. How many different colors of phosphors are needed to produce the vast majority of colors experienced in the real world?
a. just one
b. two
c. three
d. four
e. several thousand

(c)

20. Computer graphics techniques have been developed to plot
a. points and lines
b. representations of points and lines, but not points and lines

(b)

21. The need for algorithms like the DDA algorithms and the Bresenham algorithms existed for all of the following except
a. the early point-plotting displays
b. the era of line drawing displays
c. the more recent raster displays
d. (no exceptions here)

(b)

22. The DDA line-drawing algorithm must be written to plot points which are either on or below the true line, or on or above the true line. Hence, it always shifts the line one way of the other.
a. true
b. false

(b)

23. By plotting more points than the DDA algorithm for a given line, the symmetric DDA algorithm may actually run faster.
a. true
b. nonsense!

(a)

24. _____ - way symmetry can be exploited for circles _______.
a. 4, centered at the origin only
b. 4, centered anywhere, only
c. 8, centered at the origin only
d. 8, centered anywhere

(d)

25. Solving the implicit equation for a circle (for x and/or y) and using it/them to draw a circle is
a. slow and shoddy
b. slow and uniform
c. fast and shoddy
d. fast and uniform

(a)

26. Using the parametric equation to draw a circle is
a. slow and shoddy
b. slow and uniform
c. fast and shoddy
d. fast and uniform

(b)

27. The DDA circle-drawing algorithm either doesn't close or produces an ellipse.
a. true
b. false

(a)

28. The Bresenham circle algorithm is
a. slow and shoddy
b. slow and uniform
c. fast and shoddy
d. fast and uniform

(d)