DOEACC Society 2006 DOEACC A Level A10.3-R3 Computer Graphics ( ) - Question Paper

1.8 The sizes of graphics files for use on the web are decreased using
A) Compression
B) Depression
C) Impression
D) Compilation
1.9 Output, which is made up of pictures, sounds, and video, is called.
A) COM
B) Hard copy
C) Graphics
D) Multimedia
1.10 The outcome of subdivision algorithm is to perform-
A) Breadth 1st search
B) Depth 1st search
C) Logarithmic search
D) None of the above
A10.3-R3 Page three of five July, 2006
2. every statement beneath is either actual or FALSE. select the most improper one
and ENTER in the “tear-off” sheet attached to the ques. paper, subsequent
instructions therein. (1 x 10)
2.1 Using Cohen-Sutherland line clipping, it is impossible for a vertex to be tagged 1111.
2.2 The viewing transformations for orthographic projection include a shear matrix.
2.3 Ray tracing can be used to implement both illumination and visible-surface
determination.
2.4 Raster output devices use frame buffers to hold the generated image in memory.
2.5 A mouse drag is 1 way to implement a stroke input device.
2.6 JPEG files can be saved numerous times with no resulting loss in image quality.
2.7 In computer animation every frame in the sequence is called Key-Frame.
2.8 Changing the frames with respect to time is animation.
2.9 Any shear (in x and/or y) can be represented by a translation to the origin, a rotation, a
scaling, a reverse of the rotation, and a reverse of the translation.
2.10 For the scan-line polygon fill algorithm, every horizontal edge should be ignored.
3. Match words and phrases in column X with the nearest related meaning/
word(s)/phrase(s) in column Y. Enter your selection in the “tear-off” ans sheet
attached to the ques. paper, subsequent instructions therein. (1 x 10)
X Y
3.1 Technique used to create the illusion of one
object changing shape to a different
A. Bézier Curves
3.2 use(s) lossless compression only B. Digital Camera
3.3 These are curved lines and curved objects that
are described by mathematical formulas.
C. Morphing
3.4 Abbreviation for dots per inch, which shows
the resolution of images.
D. GIF format
3.5 The pictures can be downloaded to a computer
system, and then manipulated with a graphics
program and printed.
E. Tweening
3.6 File format in which the image is represented as
a collection of geometrically described objects

Earning:   Approval pending.