1. The projection that can be viewed as the projection that has a centre of projection at a finite distance from the plane of projection are called ________
Correct : B. perspective projection
2. The perspective projection is more practical because the distant objects appear _________.
Correct : A. smaller
3. The equation of scaling transformation will be ___________
Correct : B. x1=x.sx,y1=y.sy,z1=z.sz
4. The equation of translation transformation will be ______________.
Correct : A. x1=x+tx,y1=y+ty,z1=z+tz
5. The equation for describing surface of 3D plane are ______________.
Correct : A. ax+ by+ cz+ d= 0
6. The object refers to the 3D representation through linear, circular or some other
representation are called ___________
Correct : B. sweep representation
7. The distance of a line from the projection plane determines ___________
Correct : A. its size on projection plane
8. The further the line from the projection plane, _______its image on the projection plane
Correct : A. smaller
9. When two molecules move apart, which effect on molecular shapes_________.
Correct : D. all of these
10. The sweep representation of an object refers to the _____________
Correct : B. 3d representation
11. Translation is ___________ transformation in nature
Correct : C. rigid body
12. To translate a circle we add translation distances to __________ of circle.
Correct : C. center
13. Scaling factor with absolute value less than one moves object ________ to coordinate origin.
Correct : B. closer
14. Scaling factor with absolute value ________ moves object fartrher from coordinate origin
Correct : D. none of above
15. _____________ is an example of affine transformation.
Correct : D. all of above
16. We can express 2D transformations as _________ matrix operators.
Correct : C. 3 by 3
17. We can express 3D transformations as _________ matrix operators
Correct : D. 4 by 4
18. Reflections are equivalent to _________
Correct : A. 180 degree rotation
19. The subcategories of orthographic projection are_.
Correct : C. isometric,dimetric,trimetric
20. In perspective projection eye of the viewer is placed at the _.
Correct : D. center of the projection
21. In _ the projection, lines are perpendicular to the projection plane.
Correct : A. orthographic projection
22. Clockwise rotaton of 2D object is similar to clockwise rotation of _ in 3D
Correct : C. about zaxis
23. In case of 3 clipping _ is the additional thing as compared to 2d clipping.
Correct : B. back and front clipping
24. _projection ,all three principal axis are equally shortened so that realtive propostion are maintained.
Correct : A. isometric
25. In left handed system (LHS),the Zaxis_.
Correct : B. points away 4m the viewer
26. In righthanded system(RHS),the Zaxis_.
Correct : A. points towards the viewer
27. If the projection plane intersect exactly 2 principal axis then it is _.
Correct : B. two point prespective projrction
28. A 45 degree rotation about y axis will move a line on x axis to __
Correct : A. xz plane
29. Which of the following is an example of orthographic projection
Correct : C. dimetric
30. The projection line are normal to the view plane, then such type of projection is called as __
Correct : C. orthographic projection
31. Maximum no of vanishing points that can appear in a case of 3D object are_
Correct : C. 3
32. Which of the following is not a type of orthographic projection
Correct : D. both b and c
33. In case of 3d clipping end point of line segment is assigned with __ bit.
Correct : C. 6
34. __ projection are making 90 degree angle with view plane.
Correct : A. isometric
35. Dimetric projection are making _ degree angle with view plane
Correct : B. 90
36. which of the following is a 3d viewing parameter?
Correct : B. view reference point
37. In__ system +ve z axis points towards the viewer
Correct : A. right hand system
38. Which of the following parameter is newly added in 3D as compared to 2D.
Correct : C. depth
39. In 3D scaling transformation which field is addition as compared to 2D
Correct : C. sz
40. Any 3D point is represented in matrix for with dimensions are __
Correct : A. 1*3
41. In case of 3D rotation, __angle produce counterclockwise rotation
Correct : A. positive
42. In __ projection are parallel to each other
Correct : D. both b and c
43. In translaion process, the translation distance pair(tx,ty)is called a-----
Correct : D. (a) and (b)
44. If a polygon with co-ordinates A(2,5),B(7,10),C(10,2) is translated 3 units in x-direction & 4 units in y-direction then the resultant co-ord.of polygon are-----
Correct : A. a\(5,9),b\(10,14),c\(13,6)
45. If a polygon with co-ordinates A(2,5),B(7,10),C(10,2) is scaled by 2 units in x-direction & 2 units in y-direction then the resultant co-ord.of polygon becomes A'-----,B'-----,C'-----
Correct : A. (2,5),(7,10)(10,2)
46. Three axes x,y,z are at -----angles to each other
Correct : A. 90??
47. A vector perpendicular to a plane is called-----
Correct : B. normal vector
48. The equation of plane is-----
Correct : B. ax+by+cz+d=0
49. In 3D viewing mismatch between 3D objects and 2D display is compensated by introducing------
Correct : A. viewing
50. In 3D viewing----transformation transforms the projection co ordinates into the device co ordinates.
Correct : B. projection
51. view plane normal vector is perpendicular to----
Correct : C. workstation
52. 2 basic ways of projecting objects onto viewplane are --- and---
Correct : C. view
53. A ---- projection preserves relative proportion of object but does not produce the realistic view
Correct : C. parallel, perspective
54. A---- projection produces realistic view but does not preserve relative proportion
Correct : B. parallel
55. In perspective projection line of projection converge at a single point called -----
Correct : C. perspective
56. In perspective projection eye of the viewer is placed at the _.
Correct : C. translation
57. In _ the projection, lines are perpendicular to the projection plane.
Correct : D. center of the projection
58. clockwise rotaton of 2D object is similar to clockwise rotation of _ in 3D
Correct : A. orthographic projection
59. In _ transformation,we get Z(new)=Z(old).
Correct : C. about zaxis
60. In case of 3 clipping _ is the additional thing as compared to 2d clipping.
Correct : B. false
61. if two points used to specify a line are (x1, y1) and (x2, y2), then the equation of line is given as………..
Correct : B. y-y1/x-x1=y2-y1/x2-x1
62. the equation of a line in slope intercept form is given as……
Correct : C. y=mx+b
63. ……… is the fundamental element of the picture representation.
Correct : C. point
64. minimum…….. Points are required to represent a line
Correct : A. two
65. ………. and ……... are the basic output primitives.
Correct : A. points, line segments
66. points P1(3.2, 7.8) and P2(3.7, 7.1) are both represented by pixel……..
Correct : C. (3,7)
67. pixel phasing is an anti-aliasing technique based on………
Correct : A. hardware
68. pixel phasing is a technique for……..
Correct : B. anti-aliasing
69. a line connecting the points (1,1) and (5,3) is to be drawn, using the DDA algorithm. Find the values of x and y increments.
Correct : C. x-increment= 1; y-increment=0.5
70. Which of the following algorithm can be used for circle generation?
Correct : C. both a and b
71. aliasing means……..
Correct : C. staircase effect
72. slope of the line joining the points(1,2) and (3,4) is…….
Correct : B. 1
73. a line segment……………
Correct : C. ends at two points
74. the multiplication of a vector and the reciprocal of its length is equal to ……..
Correct : C. one
75. the process of turning on the pixels for a line segment is called…….
Correct : D. a or b
76. the horizontal and vertical lines drawn by line drawing algorithm are……
Correct : C. constant
77. the width of 45 degree line drawn by line drawing algorithm is………….
Correct : B. not constant
78. the brightness of the line is dependent on the ……of the line.
Correct : A. orientation
79. the horizontal and vertical lines appear …….the 45 degree line.
Correct : C. brighter than
80. DDA stands for ………….
Correct : C. digital differential analyzer
81. the slope of a straight line is given as……..
Correct : A. m= (??y / ??x)
82. the slope of a straight line is given as……..
Correct : B. m= y2-y1/x2-x1
83. in DDA line drawing algorithm, Δx or Δy, whichever is ………, is chosen as one raster unit.
Correct : D. larger
84. sign function makes the DDA line drawing algorithm work in ………….quadrants.
Correct : D. all of above
85. if a line is to be drawn from (0,0) to (4,6) using DDA line drawing algorithm, the third point to be plotted is …….
Correct : A. (1,2)
86. when a line with end-points (20,10) and (30,18) is to be drawn using DDA line drawing algrithm, ………is chosen as one raster unit.
Correct : A. ??x
87. when a line is to be drawn from (0,0) to (6,6) using DDA line drawing algorithm, the initial values for x and y are……..
Correct : B. (-0.5), (-0.5)
88. the DDA line drawing algorithm is …….. Dependent.
Correct : A. orientation
89. the end point accuracy of DDA line drawing algorithm is ……..
Correct : D. poor
90. floating point algorithm in DDA algorithm is……..
Correct : B. time consuming
91. DDA line drawing algorithm for calculating pixel position is ……… the direct use of equation y = mx + b
Correct : B. faster than
92. alorithm those use the outputs of the previous iteration, in the computation of outputs in the current iteration are called
Correct : B. incremental
93. the advantage of Bresenham's algorithm over conventional DDA algorithm is …….?
Correct : B. use of integer addition and subtraction
94. The basic attributes of a straight line segment are
Correct : D. all of these
95. A dashed line could be displayed by generating_________.
Correct : A. inter dash spacing
96. A dotted line can be displayed by generating
Correct : C. very short dashes with spacing equal to and greater than dash size
97. Which of the following is not a line-type?
Correct : B. dark line
98. In an application program, to set line-type attributes the following statement is used.
Correct : B. setlinetype(lt)
99. The algorithm which displays line-type attributes by plotting pixel spans is
Correct : A. raster line algorithm
100. the line drawn using line drawing algorithm should be displayed with ……brightness.