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Q.1 How many matrices are required to rotate an object about an arbitrary point (x,y)?
2
3
4
5
Explanation
Three matrices are required: one to translate the object to the origin, one to perform the rotation, and one to translate it back to its original position.
Q.2 In a vector scan display, the phosphor must be refreshed at least how many times per second to avoid flicker?
18
35
40
30
Explanation
To maintain a steady image without noticeable flickering, a refresh rate of at least 30 times per second (30 Hz) is required.
Q.3 In a raster scan display, the display image is stored in the refresh buffer in the form of?
0s
1s
1s & 0s
None of these
Explanation
The refresh buffer (frame buffer) stores the image as a digital map of bits (1s and 0s) representing pixel intensities.
Q.4 Which of the following techniques is used for producing images on a CRT (Cathode Ray Tube)?
Vector scan
Raster scan
Both A & B
None of these
Explanation
Cathode Ray Tubes can use either vector scan (drawing lines directly) or raster scan (scanning line by line) to create images.
Q.5 What is the full expansion of the DDA algorithm in computer graphics?
Digital Difference analyzer
Direct Difference analyzer
Digital Differential analyzer
Data Difference analyzer
Explanation
DDA stands for Digital Differential Analyzer, which is a scan-conversion line algorithm based on calculating intermediate steps using differentials.
Q.6 If the direction of rotation is the Z-axis, the direction of position for a positive rotation is typically?
y to x
z to x
x to y
y to z
Explanation
Based on the provided answer key, z to x is identified; however, in a standard right-handed system, a positive rotation around Z is usually x to y.
Q.7 Computer graphics allow for effective communication through which of the following?
Pictures
Charts
Diagrams
All of these
Explanation
Computer graphics encompass all visual representations including pictures, charts, and diagrams to convey information.
Q.8 What does the acronym GPU stand for?
Graphics Process Utilizer
Graphics Process Unicode
Graphic Process Unit
None of these
Explanation
GPU stands for Graphics Processing Unit, a specialized electronic circuit designed to rapidly manipulate and alter memory to accelerate image creation.
Q.9 Which of the following is generally NOT classified as a primary graphics input/output device?
Scanners
Video Game
Joystick
None of these
Explanation
While Scanners and Joysticks are hardware devices, a ‘Video Game’ is typically considered software or a medium rather than a specific hardware peripheral.
Q.10 By whom and in which year was the CGA (Color Graphics Adapter) introduced?
Microsoft 1991
Microsoft 1981
IBM 1981
None of these
Explanation
CGA was IBM’s first color graphics card and the first color display standard for the IBM PC, introduced in 1981.
Q.11 Which of the following display types requires the lowest amount of memory for image storage?
Random scan
Raster Scan
Both A & B
None
Explanation
Random scan (vector) displays store only the line endpoints in a display list, requiring significantly less memory than a raster scan’s full-screen pixel map.
Q.12 Raster Scan displays primarily utilize which type of tubes?
VST
DVST
CRT
None
Explanation
Raster scan systems use standard Cathode Ray Tubes (CRT) to sweep an electron beam across the screen in a regular pattern.
Q.13 Which method is used interactively to construct and position straight lines, arcs, and circles on a screen?
Rubber band method
Gravity Method
Dragging
None
Explanation
The rubber band method allows users to see a ‘preview’ of the shape stretching from a fixed point to the current cursor position before finalizing it.
Q.14 A method used to test lines for total clipping in algorithms like Cohen-Sutherland is equivalent to which logical operation?
Logical XOR
Logical OR
Logical AND
Both A & B
Explanation
If the logical AND of the region codes of both line endpoints is non-zero, the line is entirely outside the clipping window and can be rejected.
Q.15 Computer graphics can consist of which of the following?
Drawing
Photographs
Simulation
All of these
Explanation
Graphics is a broad field covering everything from simple drawings and digital photos to complex real-time simulations.
Q.16 What does the acronym CAD stand for in engineering and design?
Drawing
Computer art design
Computer-aided design
None
Explanation
CAD stands for Computer-Aided Design, which is the use of computers to aid in the creation, modification, or optimization of a design.
Q.17 Which of the following are essential components of an interactive computer graphics system?
Display controller
Frame buffer
Monitor
All of these
Explanation
An interactive system requires a monitor for output, a frame buffer to store the image, and a controller to manage the display.
Q.18 Which algorithm divides 2D space into 9 regions where only the middle region is visible?
Cohen Sutherland
Liang Barsky
Sutherland Hodegeman
H-L-N
Explanation
The Cohen-Sutherland algorithm uses 4-bit region codes to categorize endpoints into 9 areas relative to the clipping window.
Q.19 In digital displays, a higher number of pixels generally results in a ________?
Worst image
Big image
Better image
Smaller image
Explanation
Higher pixel density (resolution) allows for more detail and smoother curves, leading to a better and clearer image.
Q.20 In clipping algorithms, what is the region code of a point located inside the viewing window?
1111
0000
1000
0001
Explanation
A region code of 0000 indicates that the point does not lie above, below, to the left, or to the right of the window, meaning it is inside.
Related Link
- Computer Graphics MCQ