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Q.1 The transformation that produces a parallel mirror image of an object is called?
Transformation
Scaling
Reflection
Rotation
Explanation
Reflection is a transformation that flips an object over a line, creating a mirror image of the original shape.
Q.2 In computer graphics, 'Aliasing' is most commonly recognized as the?
Shading effect
Rendering effect
Staircase effect
None
Explanation
Aliasing occurs when high-resolution signals are poorly sampled, resulting in visual artifacts like the ‘staircase’ effect on diagonal lines.
Q.3 What is the amount of memory or the individual layers in a frame buffer called?
Bit plane
Plane
Bit
None
Explanation
A bit plane is a set of bits corresponding to one bit position in each pixel’s value within the frame buffer.
Q.4 In the Bresenham's line algorithm, the error term is typically initialized to?
0
1
-1/2
None
Explanation
Initializing the error term to -1/2 (or a related integer constant in optimized versions) allows the algorithm to determine the closest pixel using only integer math.
Q.5 Which of the following is considered a 'perspective anomaly' in 3D projection?
Oblique
Vanishing point
Cavalier
None
Explanation
A vanishing point is a point in a perspective drawing to which parallel lines appear to converge as they recede into the distance.
Q.6 Raster graphics are fundamentally composed of a grid of individual dots called?
Pixels
Lines
Paths
None
Explanation
Pixels (picture elements) are the smallest individual components of a raster image, each having a specific color or intensity.
Q.7 What does the acronym GIF stand for in image file formats?
Global image format
Global interchange format
Graphics interchange format
None
Explanation
GIF stands for Graphics Interchange Format, a bitmap image format developed by CompuServe in 1987.
Q.8 Identify the 'odd one out' among these computer components based on their primary function:
Mouse
Keyboard
Track ball
Space Ball
Explanation
Mouse, Trackball, and Spaceball are all pointing devices, whereas a Keyboard is primarily a text-entry device.
Q.9 The reflection of an object through the origin is equivalent to a rotation with which angle?
45 degree
90 degree
120 degree
180 degree
Explanation
Rotating an object 180 degrees around the origin produces the same coordinates as reflecting it across both the X and Y axes.
Q.10 A standard GIF image file supports a maximum of how many distinct colors?
256 colours
128 colours
524 colours
1 million colours
Explanation
The GIF format uses an 8-bit palette, meaning it can only display a maximum of 256 unique colors.
Q.11 Which of the following is a primary example of a non-impact printer?
Drum plotter
Electronic printer
Laser printer
All of these
Explanation
Laser printers are non-impact because they use a laser beam and toner to form images without physically striking the paper.
Q.12 The memory area that holds the intensity values for all points on a screen is known as the?
Frame buffer
Refresh RAM
Video cache
None
Explanation
A frame buffer is a portion of RAM that stores the bitmap data for one complete frame of a video display.
Q.13 The process of selecting and viewing a specific part of a picture is called?
Clipping
Windowing
Projecting
None
Explanation
Windowing is the technique of selecting a specific region of a larger scene in world coordinates for display.
Q.14 Which type of compression results in some loss of original image quality?
Lossless
Lossy
Both A & B
None
Explanation
Lossy compression reduces file sizes by permanently discarding data, which can lead to visible artifacts or reduced quality.
Q.15 Which device is specifically used in virtual reality to grasp or manipulate virtual objects?
Data glove
Digitizer
Touch panels
None
Explanation
A data glove is an interactive input device that tracks hand movements and finger positions to interact with a virtual environment.
Q.16 According to the provided key, which of the following is NOT a standard image file format?
tiff
bmp
jpg
None
Explanation
Note: While TIFF is a standard image format, it is identified here as the exception. Standard formats include BMP, JPG, and GIF.
Q.17 The 'Beam Penetration' method for producing color is usually used in which display type?
Raster scan display
LCD
Random scan display
Dust
Explanation
Beam penetration is used in random-scan (vector) monitors where different speeds of the electron beam penetrate phosphor layers to create colors.
Q.18 What is a major mathematical disadvantage of the DDA (Digital Differential Analyzer) algorithm?
Round off error
Subtraction error
Addition error
None
Explanation
DDA relies on floating-point arithmetic, which leads to cumulative rounding errors that can cause the line to drift away from its true path.
Q.19 Which type of hardware provides positional information to a computer graphics system?
Input devices
Output devices
Pointing devices
Both A & C
Explanation
Positional and coordinate data are provided to the system through various input devices, specifically those categorized as pointing devices.
Q.20 What is the standard parametric equation of a straight line between two points P0 and P1?
P(t) = P0+(P1+P0)t
P(t) = P0+(P1-P0)t
P(t) = P0-(P1-P0)t
P(t) = P0-(P1+P0)t
Explanation
The parametric equation defines a point P on a line segment between P0 and P1 as t varies between 0 and 1.
Related Link
- Computer Graphics MCQ