21. If the eccentricity is less than one then the conic is ? a. parabola b. ellipse c. hyperbola d. circle

 22. Fractals deals with curves that are ? a. regularly irregular b. irregularly irregular c. regularly regular d. irregularly regular

 23. In a clipping algorithm of Cohen & Sutherland using region codes, a line is already clipped if the ? a. codes of the end point are same b. logical AND of the end point code is not 0000 c. both (a) and (b) d. logical AND of the end point code is 0000

 24. Reflection of a point about x-axis, followed by a counter-clockwise rotation of 900, is equivalent to reflection about the line ? a. x = - y b. y = - x c. x + y = 1 d. x = y

 25. Aspect ratio is generally defined as the ratio of the ? a. Vertical to horizontal points b. Horizontal to vertical points c. Either A or B , depending on the convention followed d. Vertical to (horizontal + vertical) points
 Answer: (c).Either A or B , depending on the convention followed

 26. All the hidden surface algorithms employee image space approach except ? a. Depth sort method b. Scan line method c. Depth buffer method d. Back face removal

 27. All the following hidden surface algorithms employ image space approach except a. scan line method b. depth sort method c. depth buffer method d. back face removal
 28. The method which used either delta x or delta y, whichever is larger, is chosen as one raster unit to draw the line this algorithm is called? a. DDA Line Algorithm b. Midpoint Line Algorithm c. Bresenhams Line Algorithm d. Generalized Bresenhams Algorithm
 29. There are two standard methods of mathematically representing a circle centered at the origin. They are? a. DDA, and Bresenhams b. Polynomial Method, and Trigonometric Method c. Polynomial Method, and Bresenhams d. Trigonometric Method and Bresenham`s