 A directory of Objective Type Questions covering all the Computer Science subjects. Here you can access and discuss Multiple choice questions and answers for various compitative exams and interviews.

 71. The technique used for producing color displays with random scan CRT monitors: a. Beam Penetration b. Shadow Mask c. Direct View Storage d. Gas-Discharge

 72. The type of geometric transformation applied to an object for re-positioning it along a straight line path from one location to another: a. Scaling b. Rotation c. Translation d. Reflection

 73. A raster scan display system with 24 bits per pixel and a screen resolution of 1024x1024 requires a frame buffer size a. 1 Mega Bytes b. 3 Mega Bytes c. 8 Mega Bytes d. 24 Mega Bytes

 74. Consider the midpoint (or Bresenham) algorithm for rasterizing lines given below: Which statements are true? P: For a line with slope m>1, we should change the outer line in line (4) to be over y. Q: Lines (10) and (12) update the decision variable d through an incremental evaluation of the line equation f. R: The algorithm fails if d is over 0. ``````1. Input (x1,y1) and (x2,y2) 2. y=y1 3. d=f(x1+1,y1+1/2) //f is the implicit form of a line 4. for x=x1 to x2 5. do 6. plot(x,y) 7. if (d<0) 8. then 9. y=y+1 10. d=d+(y1−y2)+(x2−x1) 11. else 12. d=d+(y1−y2) 13. end 14. end`````` a. P, Q and R b. P only c. P and Q only d. Q and R only

 75. If the frame buffer has 10-bits per pixel and 8-bits are allocated for each of the R,G, and B components, then what would be the size of the color lookup table (LUT)? a. (2^8+2^9) bytes b. (2^10+2^8) bytes c. (2^10+2^24) bytes d. (2^10+2^11) bytes

 76. Which homogeneous 2D matrix transforms the figure (a) on the left side to the figure (b) on the right?  a. (1) b. (2) c. (3) d. (4)

 77. In 3D Graphics, which of the following statements about perspective and parallel projection is/are true? P: In a perspective projection, the farthest an object is from the centre of projection, the smaller it appears. Q: Parallel projection is equivalent to a perspective projection where the viewer is standing infinitely far away. R: Perspective projections do not preserve straight lines. a. P and Q only b. P and R only c. Q and R only d. P, Q and R