COMPUTER GRAPHICS
Multiple choice questions
1. Smallest size object that can be displayed on a monitor is called .....................
a) Picture element b) Point
c)Dot Pitch
d) aspect ratio
Ans: Picture element
2. Each screen point is referred to as .........................
a) Resolution
b)Pixel
c)Persistence
Ans: Pixel
d)Dot Pitch
3. On a monochromatic monitor, the frame buffer is known as ......................
a) Display file
b) Pixmap
c) Bitmap
d) Refresh buffer
Ans: Bitmap
4. On a color monitor, the refresh buffer is also called .....................
a)Frame buffer
b)Pixmap
c)Bitmap
d)Display file
Ans: Pixmap
5. .................. refers to pixel spacing.
a)Pixmap b)Resolution c)Pixel depth d)Persistence
Ans: Resolution
6. The distance from one pixel to the next pixel is called ...........
a)Resolution
b)Dot Pitch
c)Pixmap
d)ppi
Ans: Resolution
7. The maximum number of points that can be displayed without overlap on a CRT
a)Aspect Ratio
b)Resolution c)Brightness d)Pixel
Ans: Resolution
8. ..................... is the number of points per centimeter that can be plotted horizontally and vertically.
a)Aspect Ratio
b)Pixel Depth c)Resolution d)Dot Pitch
Ans: Resolution
9. ...................... is the ratio of horizontal points to vertical points necessary to produce equal length
lines in both direction.
a)Dot Pitch
b)Resolution c)Aspect Ratio d) Height-Width Ratio
Ans: Aspect Ratio
10. Identify the odd one out from the following
a)Frame Buffer
b)Pixmap
c)Display program
Ans: Pixmap
d)Refresh Buffer
11. The shortest distance between any two dots of the same color is called ...................
a)Resolution
b)Dot Pitch
c)Pixel Depth d)ppi
Ans: Dot Pitch
12. The standard aspect ratio for PC is .................
a) 6:5
b) 4:3 c)3:2 d)5:3
Ans: 4:3
13. In CRT, the electron intensity is adjusted using .................
a) Accelerating anode
b) Control grid
c) Electron gun
Ans: Control grid
d) Focusing anode
14. Brightness of a display is controlled by varying the voltage on the ......................
a) Focusing anode b)Connection pins
c)Control grid d)Power supply
Ans: Control grid
15. Lower persistence phosphorus is used in
a) Animation
b) Simple object
Ans: Animation
c) Complex object
d) All of these
16. Lower persistence phosphorus needs_________ refresh rate
a) Lower
b)Higher
c)Medium
d)None of these
Ans: Higher
17.. Higher persistence phosphorus needs _________ refresh rate
a) Lower
b)Higher
c)Medium
d)None of these
Ans: Lower
18. Higher persistence phosphorus is used in
a) Animation
b) Simple object
Ans: High Complex object
c) High Complex object
d) All of these
15. Memory area holding the intensity information of an image is called ..............
a)Refresh buffer
b)Font cache c)Picture definition
d)Video controller
Ans: Refresh buffer
16. Intensity representation of an image is called ......................
a)Frame buffer
b)Picture definition
c)Display list d)Brightness
Ans: Picture definition
17. The purpose of refreshing a CRT is ..........................a)To avoid flickering
b)To maintain steady picture
c)To avoid fading of pixels d)All of the above
Ans: All of the above
18. The fly-back of electron beams from one scanline to next is known as ....................
a)Vertical Retrace b)Horizontal Retrace c)Raster scanning
d)Refreshing
Ans: Horizontal Retrace
19. The return of electron beam to top left corner of the screen after one frame is called ............
a)Horizontal fly-back
b)Vertical Fly-back
c)Scanning
d)None of the above
Ans: Vertical Fly-back
20. In raster scan display, the frame buffer holds ......................
a)Line drawing commands b)Scanning instructions c)Image Resolution
Ans: Intensity information d) Intensity information
21. In random scan display, the frame buffer holds ......................
a)Line drawing commands b)Scanning instructions c)Image Resolution
d) Intensity information
Ans: Line drawing commands
22. Identify the odd one out from the following
a)Vector display
b)Raster scan display c)Calligraphic display
Ans: Raster scan display d)Stroke-writing display
22. Interlaced refresh procedure is allowed in ..................
a) LCD
b)DVST
c)Raster scan display d)Random scan display
Ans: Raster scan display
23. Vector display is well suited for .................
a) Animation
b) Line drawing applications
Ans: Line drawing applications
c) Cartoons
d) All of the above
24. Beam penetration method is usually used in ...............................
a)LCD
b)Raster Scan display c) Random scan display d)DVST
Ans: Random scan display
25. Shadow mask method is usually used in ...............................
a)LCD
b)Raster Scan display c) Random scan display d)DVST
Ans : Raster Scan display
26. Identify the colors produced in beam penetration method.
a) Red, Green, Blue, White
b)Red, Orange, Yellow, Green
c)Red, Green, Blue
d) Green, Red, White, Orange
Ans : Red, Orange, Yellow, Green
27. An RGB color system with 24 bits
os storage per pixel is known as ........................
a) Color CRT
b)True-color system
c)RGB monitor d)Color- Depth
Ans: True-color system
28. Identify the features of Vector display
a)High resolution, Jagged lines, Lack in color depth
b)Smooth lines, Poor resolution, Black & White
c)High resolution, Lack in color depth, Smooth lines
d)Inexpensive, monochromatic, smooth lines
Ans: High resolution, Jagged lines, Lack in color depth
29. Identify different type of computer graphics
a) Monochrome and Color
b)CRT and Flat panel
c)Vector an Raster
d)Monitors and Hardcopy devices
Ans: Vector an Raster
30. DVST stands for ..........................
a)Digital View Storing Table
b)Direct Visual Storage Tube
c)Direct View Storage Tube
c)Digital View Storage Tube
Ans: Direct View Storage Tube
31. Refreshing is not needed in DVST because of the presence of .................
a) Primary gun
b) Flood gun c) Focusing anode
d)Control grid
Ans: Flood gun
32. In DVST, the electron beam from primary electron gun strikes on ..............
a) Phosphor screen b) Collector mesh
c)Storage mesh d) Flood gun
Ans: Storage mesh
33. The purpose of flood gun in DVST is ...........................
a) To store the picture pattern
b) To slow down the flood electrons
c) To enable color pixels
d) To focus the electron beam
Ans: To slow down the flood electrons
34. Identify the features of DVST from the following.
a) Monochromatic, Flicker free, Low resolution
b)Monochromatic, Flicker free
c) Color screens, Refresh monitors, High resolution d)Expensive, Low resolution
Ans: Monochromatic, Flicker free
35. Video devices with reduced volume, weight and power consumption are collectively known as .........a) Light weight monitors
Ans: Flat panel displays
b)Flat-panel displays
c)CRT d) Portable display
36. Pick out the odd one out
a) LED
b)LCD c) Gas Discharge tube d) Plasma Panel
Ans: LCD
37. Match the following
Part A
A. Plasma panel
B. DVST
C. LCD
D. Thin film electroluminescent
a) A-ii, B-iv, C-i, D-iii
c) A-iv, B-iii, C-i, D-ii
Ans: A-iv, B-iii, C-i, D-ii
Part B
i) Polarizer
ii) Zinc sulfide
iii) Dielectric mesh
iv)Neon gas
b) A-ii, B-iii, C-iv, D-i
d) A-i ,B-iv, C-ii, D-iii
38. ................... is responsible for accessing the frame buffer to refresh the screen.
a) Graphics package
b) Video controller
c) CPU
d) Monitor
Ans: Video controller
39. Digitizing a picture definition into a set of intensity values is known as .............
a) Digitization
b) Scan conversion
c)Refreshing d) Scanning
Ans: Scan conversion
40. ....................... will free the CPU from graphics chores.
a) Display processor
b) Monitor
c) ALU
Ans: Display processor
d)Video controller
41. Write an example for non-emissive displays
a) LED
b)LCD c) Gas Discharge tube d) Plasma Panel
Ans: LCD
42. Identify impact printer from the following
a) Drum Plotter
b)Inkjet printer c)Electrostatic printer
Ans: Dot-matrix printer
45. Write an example for non-impact printer
a) Drum plotter
b) Electrostatic printer c) Laser printer
Ans: All of the above
46. Identify the odd one out.
a) Mouse b) Keyboard
Ans: Keyboard
c) Trackball
d) Space ball
d) Dot-matrix printer
d) All of the above
47. GIF stands for ......................
a) Global Image Format
b) Graphics Interchange Format
c) Graphics Image Format d) None of the above
Ans: Graphics Interchange Format
48. The ................ simply reads each successive byte of data from the frame buffer.
a) Digital Controller
b) Data Controller
c) Display Controller d) All of above
Ans: Display Controller
49. The refresh rate below which a picture flicker is ................
a) 25
b) 30 c)35 d)60
Ans: 25
50. ........ used to regulate the flow of elections in CRT ?
a) Electron gun
b) Focusing anode
c) Control grid d) All of the above
Ans: Control grid
51. The technique used to summarize the financial, statistical, mathematical,scientific and
economic data is ?
a) Computer Art b) Image processing c) Presentation Graphics
Ans: Presentation Graphics
d)None of the above
52. Graphics and image processing technique used to produce a transformation of one object into
another is called
a) Animation
b) Morphing c) Half toning d) None of the above
Ans: Animation
53. The amount of light emitted by the phosphor coating depends on the?
a) Number of electrons striking the screen
b) Speed of electrons striking the screen
c) Distance from the cathode to the screen
d)None of above
Ans: Number of electrons striking the screen
54. Gray scale is used in ............................
a) A Monitor that have color capability
b) A Monitor that have no color capability
c) Random scan display
d) Raster scan display
Ans: A Monitor that have no color capability
55. A wireless mouse works ona) Infra blue radiation
Ans: Infrared radiation
b) Infra Red radiation
c) X-rays
d) UV rays
56. Vector graphics is composed of
a. Pixels
b. Paths
d. None of these
Ans: Paths c. Palette`
57. Raster graphics are composed of
a.Pixels
b.Paths
c. Palette
Ans: Pixels
58. EPS image file format is used for
a) Vector graphics b) Bitmap
c) Both a & b d) None of these
Ans: Both a & b
59. TIFF (tagged image file format )are used for
a.Vector graphics
b.Bitmap
c. Both a & b
Ans: Bitmap
66.A major disadvantage of DVST in interactive computer graphics is
a) Ability to selectively erase part of an image
b) Inability to selectively erase part of image from screen
c) Inability to produce bright picture
Noned) None
Ans: Inability to selectively erase part of image from screen
67. Which of the following allow for 8 mirror images?
a) Parabola
b)Ellipse
c)Hyperbola
d) Circle
Ans: Circle
68. The simplest output primitive is .............
a) Straight line b) Straight line segment
Ans: Point
c) Point
d)Circle
69. A bitmap is .............. bit(s) per pixels.
a) 0
b)1
c)2
d)4
Ans: 1
70. The intensity of a grayscale pixel is expressed within a given range between a minimum and a maximum
a) 1 and 2
b) 2 and 1
c) 0 and 1
d)0 and 2
Ans: 0 and 1
71. Each pixel has ________basic color components
a.Two or three
b.One or two
b.Three or four
d.None of these
Ans: Three or four
73. The basic geometric structures that describes a scene on display is called .................
a) Attributes
b) Output primitive
c) Lines
d) Curves
Ans: Output primitive
74. ..................... controls the basic display properties of output primitives.
a) Attribute parameter b) setpixel
c) getpixel
d) None of the above
Ans: Attribute parameter
75. To set line width attributes in a PHIGS package, ................... function is used.
a) setLineThickness(lw)
b)setLineWidth(lw)
c) setLineWidthScaleFactor(lw)
d)setPolylineWidth(lw)
Ans: setLineWidthScaleFactor(lw)
76. Identify the values for fill-style parameter from the following
a) Hollow
b)Hatch
c) Pattern
d)All of the above
Ans: All of the above
77. ...................... function is used to set the basic fill style.
a) setFillStyle(fs)
b) setFillStyleIndex(fs)
c) setInteriorStyle(fs)
d)FillType(ft)
Ans: setInteriorStyle(fs)
78. ..................... is defined as the distance between the baseline and cap line of the character body.
a) Character Size b) Character Height
c) Character Width
d)Character Length
Ans: Character Height
80. ............... function is used to change the size of a character without changing the height:width ratio.
a)setTextSize(ts) b)setCharacterHeight(ch)
c)setCharacterSize(cs) d)setTextHeight(th)
Ans: setCharacterHeight(ch)
81. .................. will define a group of attribute values of each primitive to be used on a monitor
a) Primitive table b)Bundle table c) Attribute table
d) None of the above
Ans: None of the above
82. ............. function is used to set how text is to be positioned with respect to the start coordinates
a) setTextAlignment(h,v) b)setTextPrecision(tp) c)setTextPosition(h,v) d)setText(ts)
Ans: setTextAlignment(h,v)
83. ................ is used to check the current status of each attributes
a) setpixel
b)getpixel
c)inquiry function
d)status function
Ans: Inquiry function
84. The basic transformations include
a) Translation
b)Rotation
c)Scaling
d) All of the above
Ans: All of the above
85. The transformation in which an object is moved in a minimum distance path from one position to
another is called
a) Rotation b) Replacement
c) Translation d) Scaling
Ans: Translation
86. The translation distances (dx, dy) is called as
a) Translation vector
b) Shift vector c) Both a and b
d) Neither a nor b
Ans: Both a and b
87. The two-dimensional translation equation in the matrix form is
a) P’=P+T
b) P’=P-T
c) P’=P*T
d) P’=p
88. The transformation in which an object is moved from one position to another in circular path around
a specified pivot point is calleda ) Rotation
b) Shearing
c) Translation d) Scaling
Ans: Rotation
89. The transformation in which the dimension of an object are changed relative to a specified fixed point
is called
a ) Rotation
b) Reflection
c) Translation d) Scaling
Ans: Scaling
90. The transformation that produces a parallel mirror image of an object are called
a ) Rotation
b) Reflection c) Translation d) Scaling
Ans: Reflection
99. Which of the following is not a rigid body transformation?
a) Translation
b) Rotation
c) Shearing
d) Reflection
Ans: Shearing
101. Two consecutive translation transformation t1 and t2 are
a) Additive b) Multiplicative
c) Subtractive d) none of above
Ans: Additive
102. Two consecutive rotation transformation r1 and r2 are
a) Additive b) Multiplicative
c) Subtractive d) none of above
Ans: Additive
103. Two consecutive scaling transformation s1 and s2 are
a) Additive
b) Multiplicative
c) Subtractive d) none of above
Ans: Multiplicative
104. The process of mapping a world window in world coordinate system to viewport are called
a) Transformation viewing
b) Viewport
c) Clipping window
d) Screen coordinate system
Ans: Transformation viewing
105. The process of extracting a portion of a database or a picture inside or outside a specified region are
called
a) Transformation b) Projection c) Clipping
d) Mapping
Ans: Clipping
106. The rectangle portion of the interface window that defines where the image will actually appear are
called
a) Transformation viewing b) View port c) Clipping window
d) Screen coordinate system
Ans: View port
107. The phenomenon of having a continuous glow of a beam on the screen even after it is removed is
called as ?
a) Fluorescence
b) Persistence c) Phosphorescence
d) Incandescence
Ans: Phosphorescence
191. In ........................ mode the program requests input and suspends processing until input is
received.
a) Request
b) Event
c) Sample
d) Constraint
Ans: Request
198. ........................ is an adaptation of binary tree representing the 2-D point data
a) Region quad tree b) Edge quad tree
c) Point quad tree
d) Child quad tree
Ans: Point quad tree
199. .................... quad tree stores line rather than point.
a) Region quad tree b) Edge quad tree
c) Point quad tree
Ans: Edge quad tree
200. .................... is commonly used to store sparse data
a) quad tree b) Table
c) Binary tree d) Octant
Ans: quad tree
d) Child quad tree