About Computer Graphics

Following are some of the multiple choice questions on the Computer Graphics with answers that will help the students in developing their knowledge.

Computer Graphics MCQ

1. The disadvantage of line DDA is

  • Time consuming
  • Faster
  • Neither a nor b
  • None of the mentioned

2. The matrix representation for scaling in homogeneous coordinates is

  • P’=S*P
  • P’=R*P
  • P’=dx+dy
  • P’=S*S

3. To apply the midpoint method, we define

  • circle(x, y)= x2+ y2- r2
  • circle(x, y)= x+ y2- r2
  • circle(x, y)= x2– y2- r2
  • circle(x, y)= x2+ y2- z2

4. Two successive translations are___________________

  • Subtractive
  • Additive
  • Inverse
  • Multiplicative

5. Initial decision parameter P0 in Mid Point Circle drawing algorithm is

  • P0=1-R
  • P0=1-R2
  • P0=1 + R
  • P0= 1+R2

6. The Cartesian slope-intercept equation for a straight line is

  • y = m.x + b
  • y = b.x + m
  • y = x.x + m
  • y = b + m.m

7. Gd parameter in initgraph() method means

  • Graphic Display
  • Graphic Density
  • Graphic Driver
  • Graphic declaration

8. The two-dimensional rotation equation in the matrix form is

  • P’=R*P
  • P’=P+T
  • P’=P*P
  • P’=R+P

9. If the boundary is specified in a single color, and if the algorithm proceeds pixel by pixel until the boundary color is encountered is called

  • Scan Line Algorithm
  • Flood Fill Algorithm
  • Boundary Fill Algorithm
  • None of the above

10. On raster system, lines are plotted with

  • Lines
  • Dots
  • Pixels
  • None of the mentioned

11. Positive values for the rotation angle ϴ defines

  • Counterclockwise rotations about the end points
  • Counterclockwise translation about the pivot point
  • Counterclockwise rotations about the pivot point
  • Negative direction

12. Which transformation distorts the shape of an object such that the transformed shape appears as if the object were composed of internal layers that had been caused to slide over each other?

  • Scaling down
  • Shearing
  • Scaling up
  • Rotation

13. In a reflection, by how much angle is the object rotated?

  • 45 degree
  • 180 degree
  • 90 degree
  • 360 degree

14. The seed fill algorithm for filling polygon is classified as ________ fill algorithm and _______ fill algorithm.

  • Even,Odd
  • Boundary, Scan
  • Flood, Boundary
  • Edge, Flood

15. Cohen-Sutherland clipping is an example of _________________

  • polygon clipping
  • text clipping
  • curve clipping
  • line clipping

16. Which of the following represents shearing?

  • (x, y) → (x cos(θ)+y sin(θ), -x sin(θ)+y cos(θ))
  • (x, y) → (ax, by)
  • (x, y) → (x+ay, y+bx)
  • (x, y) → (x+a, y+b)

17. Reflection about the line y=0, the axis, is accomplished with the transformation matrix with how many elements as ‘0’?

  • 8
  • 9
  • 4
  • 6

18. Number of control points in parametric cubic curve is

  • 6
  • 9
  • 12
  • 4

19. Which of the following co-ordinates are NOT used in 2d viewing transformation?

  • modelling co-ordinates
  • vector co-ordinates
  • viewing co-ordinates
  • device co-ordinates

20. In line clipping, the portion of line which is _____________ of window is cut and the portion that is _____________ the window is kept.

  • outside, inside
  • inside, outside
  • exact copy, different
  • different, an exact copy

21. A bitmap is collection of ___________________ that describes an image.

  • bits
  • colors
  • algorithms
  • pixels

22. An area on a physical device to which a window is mapped is called a

  • Window
  • clip
  • Viewport
  • Segment

23. Transformations can be applied on _______________.

  • Objects
  • Co-ordinates
  • Both Objects and Co-ordinates
  • None of the options

24. For a point to be clipped, which of the following conditions must be satisfied by the point?

  • ywmin = y = ywmax
  • xwmin > x > xwmax
  • xwmin = x = xwmax
  • xwmin < x < xwmax

25. An accurate and efficient raster line-generating algorithm is

  • DDA algorithm
  • Mid-point algorithm
  • Parallel line algorithm
  • Bresenham’s line algorithm

26. __________ is a method for testing a pixel inside of a polygon.

  • even-odd method
  • Winding Number Method
  • Both A & B
  • None of these

27. The centre region of the screen and the window can be represented as________

  • 0000
  • 1111
  • 0110
  • 1001

28. Which algorithm is a faster method for calculating pixel positions?

  • Bresenham’s line algorithm
  • Parallel line algorithm
  • Mid-point algorithm
  • DDA line algorithm

29. The Cohen-Sutherland algorithm divides the region into _____ number of spaces.

  • 8
  • 6
  • 7
  • 9

30. Which is a good logo?

  • All of above
  • practical
  • appropriate,
  • distinctive

31. What does PDF stand for?

  • Portable device format
  • Portable document format
  • Picture document format
  • Preferred document format

32. How many Fonts in a Font File?

  • 2
  • many
  • 1
  • 3

33. What is Euler's Formula

  • V-E-F=2
  • V+E-F=2
  • V+E+F=0
  • V-E+F=2

34. Which is not a type of 3D projection

  • Perspective
  • Orthogrpahic
  • Isomorphic
  • Progressive

35. Which are Windows Font File types?

  • TTF, OFT
  • OTF, TTF
  • TTL, OLF
  • OLP, TTP

36. Which is the best line algorithm to balance the processing load among the processers?

  • Parallel line algorithm
  • DDA line algorithm
  • Bresenham’s line algorithm
  • Position Bresenham’s line algorithm

37. Which one of these is not a common RASTER file?

  • bitmap
  • png
  • jpg
  • pdf

38. What is a digital graphic?

  • A visual representation of an object
  • a photograph
  • An edited photograph
  • All of above

39. Which file type allows for compression and transparency?

  • PNG
  • JPG
  • BMP
  • PDF

40. The point that remains fixed during a rotational transformation is ____________.

  • Lower left corner of an object
  • Origin of the Co-ordinate system
  • All points of the object
  • None of the above

41. What is the use of homogeneous coordinates and matrix representation?

  • To scale
  • To rotate
  • To treat all 3 transformations in a consistent way
  • To shear the object

42. We can combine the multiplicative and translational terms for 2D into a single matrix representation by expandinga) 2 by 2 matrix into 4*4 matrixb) 2 by 2 matrix into 3*3c) 3 by 3 matrix into 2 by 2d) Only c

  • 2 by 2 matrix into 4*4 matrix
  • 2 by 2 matrix into 3*3
  • 3 by 3 matrix into 2 by 2
  • Only C

43. If both codes are 0000, (bitwise OR of the codes yields 0000) line lies __________________ the window.

  • completely outside
  • half inside half outside
  • completely inside
  • can’t say anything

44. The process of elimination of parts of a scene outside a window or a viewport is called _____________

  • clipping
  • editing
  • plucking
  • cutting

45. What is the Clipping point of a line AB where A(40,40) and B is (60,25) against a window defined by (wxmin,wymin) as (10,10) and (wxmax,wymax) as (50,50)

  • (50,50)
  • (50,32.50)
  • (36.67, 32.50)
  • (36.67,36.67)

46. What does PPI stand for?

  • Process Post Inspect.
  • Print Per Inch.
  • Pixels Per Inch.
  • Pixels Print Image.

47. What is the best size resolution for printing?

  • 72 PPI
  • 100 PPI
  • 1500 PPI
  • 300 PPI

48. Do Cameras store Pictures in RAW format?

  • Yes
  • No

49. Which Graphic File type permits animation?

  • JPEG
  • GIF
  • TIFF
  • PNG

50. Which HEX color code is closer to black?

  • #F5FA11
  • #5F2871
  • #DA0901
  • #191919

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