21.  If the eccentricity is less than one then the conic is ? 
Answer: (b).ellipse

22.  Fractals deals with curves that are ? 
Answer: (a).regularly irregular

23.  In a clipping algorithm of Cohen & Sutherland using region codes, a line is already clipped if the ? 
Answer: (c).both (a) and (b)

24.  Reflection of a point about xaxis, followed by a counterclockwise rotation of 900, is equivalent to reflection about the line ? 
Answer: (d).x = y

25.  Aspect ratio is generally defined as the ratio of the ? 
Answer: (c).Either A or B , depending on the convention followed

26.  All the hidden surface algorithms employee image space approach except ? 
Answer: (d).Back face removal

27.  All the following hidden surface algorithms employ image space approach except 
Answer: (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? 
Answer: (a).DDA Line Algorithm

29.  There are two standard methods of mathematically representing a circle centered at the origin. They are? 
Answer: (b).Polynomial Method, and Trigonometric Method

30.  There are 2 types of polygons. They are? 
Answer: (b).convex and concave
