oDesk PC Graphics Test Answers
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What is meant by the term fog?
a. The mixing of an image with a fixed color that thickens as the
image's pixels get further away from the viewpoint.
b. A special type of channel used in graphics software for saving
selections.
c. a technique of blending bitmap-based images and text to reduce
the stair-stepping or jagged appearance.
d. The relationship of an image's width to height or its
proportions.
In a 3-D graphics environment, the process of
subdividing a surface into a mesh of smaller shapes that are easy to analyze is
known as:
a. Anti-aliasing
b. Tessellation
c. Blending
d. Texture mapping
The serial execution of the processes applied to
geometric primitives (text, lines, polygons, curves, and surfaces) in a
graphics package to produce two-dimensional output is called its:
a. Execution LIFO stack
b. Graphical modeling
c. Transmogrification
d. Rendering pipeline
a. A part of off-screen memory that holds the distance from the
viewpoint for each pixel, the Z-value.
b. A programmed function in illustration software that converts
raster graphics into vector graphics whereby paths are created along the edges
of a scanned image.
c. A process of removing hidden surfaces by sorting polygons in back-to-front
order prior to rendering.
d. Areas in an image with a blocky or blotchy appearance.
Which
of the following is the most commonly used lighting model?
a. Xerxes
b. Z-buffering
c. Texture mapping
d. Phong
What does the term "flythrough" imply?
a. A series of mathematical operations that act on output primitives
and geometric attributes to convert them from modeling coordinates to device
coordinates.
b. A memory buffer used to hold one line of video.
c. Displayed representation of a scene or an object that appears
to have three axes of reference: height, width, and depth (x, y, and z).
d. A type of animation in which the camera moves around a scene,
rather than objects moving in front of a stationary camera.
Which of the following polygon meshes is most
commonly used in mesh modelling because its input data are more readily
acceptable to modern hardware?
a. Vertex-vertex mesh
b. Winged-edge mesh
c. Vertex-face mesh
d. Quad-edge mesh
Which of the following techniques reduces the
appearance of jagged edges of lines and edges in raster graphics?
a. Warnock space subdivision
b. Depth sort
c. Gouraud shading
d. Anti-aliasing
The
vector-graphics package that was developed by Microsoft is:
a. Draw
b. Inkscape
c. Illustrator
d. Visio
Which one of the following formats would provide
the least amount of pixelation when its dimensions are scaled (magnified) in
size?
a. JPEG
b. TIFF
c. PNG
d. EPS
What does the term "depth sort" imply?
a. To convert an image or signal into digital code by scanning,
tracing on a graphics tablet, or using an analog to digital conversion device.
b. An algorithm for creating a hidden-line drawing of polygon data
sets by drawing the polygons from the most distant to the closest, in order.
c. The simulation of a continuous-tone image (shaded drawing,
photograph) with dots.
d. In computer graphics, a particular shade or tint of a given
color.
Which of the following rotation techniques gives
the best results?
a. Euler angles
b. Axis-angle
c. 3 by 3 matrix
d. Quaternions
Which one of the color parameters measures how
far away the color is from gray?
a. Hue
b. Saturation
c. Brightness
d. Gamut
A process in 2-D computer graphics whereby a
closed vector path is used to mask (block) parts of an image is known as:
a. Double path
b. Palletized path
c. Keying path
d. Clipping path
Which of the following is/are typical steps in a
graphical pipeline that converts three-dimensional objects for two-dimensional
display or printing?
a. Hidden line/hidden surface removal (HLHSR)
b. Rasterization
c. Viewport mapping and clipping
d. Writing to the framebuffer
In computer graphics, when a line or object is
moved where one end or point stays fixed in position is termed as:
a. Perfect banding
b. Rubber banding
c. Print banding
d. Saddle banding
