Computer Science 455
Instructor: R. P. Burton
First Quiz
Name
_________________________________________ Score
____________/xx
1.
Computer graphics became economically viable
a. Immediately after its “birth” with the completion of Sutherland’s dissertation in the early 1960s.
b. Within approximately a year
of the completion of Sutherland’s dissertation when IBM assimilated and “mass
produced” computer graphics capabilities.
c. In the 1970s when processing
speeds increased and memory prices decreased (which also led to the
availability of “personal computers.”)
d. In the 1980s with the advent of
“photorealistic” images.
(c)
2.
Which industry(ies) immediately and readily
appreciated the application of computer graphics to assist with traditional
activities:
a.
flight training
b.
animation (for movies)
c.
both
d.
neither
(d)
3.
One of the first areas of application to make use of computer graphics
was
a.
(industrial) design
b.
(automobile) accident reconstruction
c.
(residential) architecture
(a)
4.
Computer graphics is applicable to the presentation of (pick the most
encompassing answer)
a.
phenomena which are visible to the nature eye
b.
phenomena which occur in the real world, including visible phenomena
c.
phenomena which occur in the real world, and phenomena which occur in
other imaginary, 3D worlds
d.
phenomena which might occur in any 3D world, or which can only be
imagined, even if they violate the laws of physics
e.
anything that can be suggested by the mind
(d)
5.
What is the purpose of the control grid in a CRT?
a.
to generally direct and to control the number of electrons that move
from the cathode toward the focusing system
b.
to deflect the electrons horizontally or vertically
c.
to determine whether the electrons should be directed
toward red, green, or blue phosphors.
(a)
6.
The higher the persistence of a phosphor, the better in general
(ignoring for the moment the cost of high persistence phosphors).
a.
true
b.
false
(b)
7.
Fluorescence occurs when electrons have ceased to bombard the phosphor.
a.
true
b.
false
(b)
8.
The more detailed the image, the longer it takes to paint the image on
the screen in
a.
a stroke display system
b.
a raster display system
c.
both a stroke and raster display system
(a)
9.
A beam penetration CRT
a.
consists of a collector grid, a storage grid, and a screen
b.
has two layers on monochrome phosphor, each of a different color
c.
is any CRT where the kinetic energy of electrons is absorbed by a
phosphor, producing photons
(b)
10.
A shadow-mask CRT has _____ electron gun(s) and _____ deflection
system(s).
a.
1, 1
b.
1, 3
c.
3, 1
d.
3, 3
(c)
11.
The principal advantage of a direct view storage tube is
a.
the direct, and very efficient connection between frame buffer memory
and the display.
b.
the elimination of transformations from memory representations to
screen representations
c.
the avoidance of the need to refresh the image on the screen.
d.
the relative light weight of the display device.
(c)
12.
With a plasma panel, all of the following were possible, EXCEPT
a.
selective writing (of “pixels”)
b.
selective erasure (of “pixels”)
c.
refresh without considering the representation of the image in memory
d.
(no exceptions here)
(d)
13.
Which of the following techniques relies solely on the interocular distance (separation of the eyes) to present
separate images to each eye?
a.
varifocal mirrors
b.
bimodal projection
c.
shutters (as used by Stereographics)
d.
head mounted displays
(a)
14.
Which of the following techniques represents true 3D output?
a.
holography
b.
autosterograms
c.
stereolithography
d.
bimodal projection
e.
(none of the above)
(c)
15.
What is the function of a “pick” device which distinguishes it from a “choice”
device?
a.
none; they are synonyms
b.
“pick” devices select scene elements where as “choice” devices select
menu items
c.
“pick” devices are used to specify locations (usually in 2D) whereas
“choice” devices are used to request the coordinates of locations (usually 2D)
(b)
16.
The early SRI Mouse (which had two, perpendicular, rotating wheels in
its underside) was essentially a failure since it responded unpredictably (The
wheels slipped easily on the plastic surfaces used with “mice” in those days). Not until the (now obvious) invention of the
mouse pad did mice have any real utility.
a.
true
b.
false
(b
– visual feedback compensated)