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CGA EXACT QUESTIONS WITH COMPLETE ANSWERS ALREADY GRADED A+
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CGA EXACT QUESTIONS WITH COMPLETE ANSWERS ALREADY GRADED A+
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CGA1. Which of the following algorithms is primarily used for line drawing in computer
graphics?
A) Dijkstra's Algorithm
B) Bresenham's Algorithm
C) A* Algorithm
D) Kruskal's Algorithm
Answer: B) Bresenham's Algorithm
2. In computer graphics, what is the purpose of the z-buffer?
A) To manage the color of pixels
,B) To store the brightness of pixels
C) To keep track of object depth information
D) To control the frame rate of rendering
Answer: C) To keep track of object depth information
3. Which of the following is a common technique used in texture mapping?
A) Clipping
B) Shading
C) Filtering
D) Rasterization
Answer: C) Filtering
4. What does the term "ray tracing" refer to in computer graphics?
A) A method for calculating lighting and shadows
B) A technique for color blending
C) A compression technique for images
D) A data structure used for storing 3D objects
Answer: A) A method for calculating lighting and shadows
5. Which shading model calculates lighting at each vertex and then interpolates the
values over the surface of the polygon?
A) Flat Shading
B) Gouraud Shading
C) Phong Shading
D) Lambertian Shading
Answer: B) Gouraud Shading
6. What is the primary function of the OpenGL library in computer graphics?
,A) Audio processing
B) Image editing
C) Graphics rendering
D) Database management
Answer: C) Graphics rendering
7. In computer graphics, which transformation is used to change the size of an
object?
A) Translation
B) Rotation
C) Scaling
D) Shearing
Answer: C) Scaling
8. Which of the following is NOT a basic geometric transformation?
A) Translation
B) Rotation
C) Shearing
D) Refraction
Answer: D) Refraction
9. In raster graphics, what does anti-aliasing help to reduce?
A) Rendering time
B) File size
C) Jagged edges
D) Color contrast
Answer: C) Jagged edges
, 10. In the RGB color model, what do the letters R, G, and B stand for?
A) Red, Green, Blue
B) Red, Gray, Black
C) Royal, Gold, Brown
D) Rose, Green, Blue
Answer: A) Red, Green, Blue11. What is the main purpose of the alpha channel in
images?
A) To store depth information
B) To represent transparency
C) To control image resolution
D) To adjust color balance
Answer: B) To represent transparency
12. Which technique is used to approximate smooth curves by connecting a series of
straight line segments?
A) Bézier Curves
B) B-splines
C) Catmull-Rom Splines
D) Polygon Meshes
Answer: A) Bézier Curves
13. What does the term "clipping" refer to in computer graphics?
A) Removing hidden surfaces
B) Trimming parts of an object outside a viewable area
C) Enhancing image sharpness
D) Filtering colors
Answer: B) Trimming parts of an object outside a viewable area
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