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# Computer Graphics MCQs

Computer Graphics MCQs: This section contains multiple-choice questions with answers and explanations. Practice these MCQs on Computer Graphics to learn, enhance, and test your skills in Computer Graphics.

## List of Computer Graphics MCQs

1. What is the range of the pixels in a Grayscale images?

1. 0 - 1
2. 0 - 255
3. 0 - 210
4. None of the above

Explanation:

The pixel value of the grayscale image defines the brightness of the pixel. Here, the pixel value is stored as a byte value, i.e. an 8-bit value. Hence, the value of every pixel in a grayscale image ranges from 0 to 255.

2. The RGB image is known as the true color image. What does RGB stand for?

1. Real grey Black Image
2. Red greyed Background Image
3. Red Green Blue image
4. None of the above

Answer: c. Red Green Blue Image

Explanation:

The RGB Image which is also known as the true color image or the tri-color image stands for Red- Green- Blue image. This is because an RGB image can be viewed as three different color images: Red Green and Blue.

3. What is the pixel range for an RGB image?
Or
What is the minimum and maximum possible value for each of the pixels of an RGB image?

1. 0 - 23
2. 0 - 224
3. 0 - 1
4. None of the above

Answer: d. None of the above

Explanation:

The RGB image has three different values for each color band, and the range of each color is 0 to 255. Hence, an RGB image is stored in a 3-dimensional array where each dimension represents one of the colors, with a value lying between 0 - 255.

4. Which of the following options is not correct according to the definition of Computer Graphics?

1. Computer Graphics is used for animation purposes.
2. Computer graphics can be used to provide better user interface.
3. Computer graphics can improve the sound quality of a video
4. None of the above

Answer: c. Computer graphics can improve the sound quality of a video

Explanation:

Computer graphics has nothing to do with the audio of any device. Its sole purpose is to deal with the imaging and animations part.

5. "The term GRAPHICS in computer graphics is made up of graphs and pics."
Based on the above statement, determine whether the following condition is true or false.
"Computer games development does not include computer graphics as there are no graphs and pics in it."

1. True
2. False

Explanation:

The game development does include a lot of graphics work for all the animations and interfaces.

6. GUI stands for,

1. Graphical Usable Interface
2. Graphical User Interface
3. Graph Users Interface
4. Graphic User Interface

Explanation:

GUI is known as Graphical user interface as its acts as interface between the user and the system in the form of graphical data.

7. PPI stands for,

1. Pixel per inch
2. Photos per instruction
3. Pixels per image
4. None of the above

Explanation:

PPI stands for number of pixels that are present per inch in image.

8. Who among the following developed the CRT (Cathode Ray Tube)?

1. Charles Darwin
2. Ferdinand Barun
3. Thomas Alva Edison
4. None of the above

Explanation:

The Ferdinand Barun of Strasbourg developed the Cathode Ray Tube (CRT) in 1897.

9. The inside of the Cathode Ray Tube is coated with what material?

1. Fluorescent powder
2. No coating
3. Phosphorus
4. None of the above

Explanation:

The inside of the CRT is coated with phosphorus because phosphorus glows when a high energy electron beam hits on to it.

10. Which among the following is not merit (advantage) of the Cathode Ray Tube?

1. It runs at highest pixel ratio
2. It is less expensive than any other display technology
3. It is very large, heavy and bulgy
4. None of the above

Answer: c. It is very large, heavy and bulgy

Explanation:

Being large, heavy, and bulgy cannot be taken as an advantage of the cathode ray tube. Other displays technologies are available now which are light weighted, flat, and much more advanced.

11. Which of the following options is correct in accordance with the cathode ray tube?

1. CRTs are brighter than LCDs.
2. CRTs can operate at any resolution and at any aspect ratio.
3. CRTs are the most expensive display device till current date.
4. None of the above

Answer: c. CRTs can operate at any resolution and at any aspect ratio

Explanation:

All the other options are incorrect for a Cathode Ray Tube. The only option (b.) is correct. Because the CRTs are not brighter than LCDs. Also, CRTs are very cheap. The only true option is: the CRTs can operate at any resolution and any aspect ratio.

12. Which among the following is a part of the Cathode Ray Tube?

1. Control Electrode
2. Electron Gun
3. Focusing System
4. All of the Above

Answer: d. All of the above

Explanation:

The Cathode Ray Tube (CRT) contains all the mentioned parts: the Control Electrode, the Electron Gun, and the Focusing system.

13. CRT stands for,

1. Cathode Random Tunnel
2. Cathode Ray Tube
3. Cathode Random Tube
4. Cathode Ray Tunnel

Explanation:

CRT stands for "Cathode Ray Tube" and it is used in monitors and TV's.

14. What is the work of control electrode?

1. It controls the electron beam
2. It established the electrode-cathode connection
3. Its glows the electrode
4. None of these

Answer: a. It controls the electron beam

Explanation:

The control electrode turns the electron beam on and off.

15. Which lights form the viewing colors that we see on the screen?

1. Red
2. Blue
3. Green
4. All of these

Explanation:

All these colors lights are primary i.e., changing their intensity can make any color.

16. Which part of CRT monitor is responsible for clear picture on the screen?

1. Phosphorus Screen
2. Deflection Yoke
3. Focusing System
4. Colored Lights of the screen

Explanation:

Focusing systems focus a narrow beam of electron, which leads to sharper and clearer picture quality.

17. Which part of the CRT contains cathode?

1. Focusing system
2. Electron Gun
3. Screen
4. Control Electrode

Explanation:

The electron gun contains a cathode which throughs the electron beam.

18. Which of the following methods is the fastest pixel position calculating method?

1. Bressenham's line algorithm
2. DDA line algorithm
3. Mid-point algorithm
4. None of the above

Explanation:

The DDA is the fastest algorithm among the given algorithms for calculating the position of the pixels because it has a very easy formula or way to calculate which can be readily implemented and executed in programs.

19. Which of the following line algorithms best balances the processing load among all the processers?

1. Parallel line algorithm
2. DDA line algorithm
3. Both a. and b. balances the load equally
4. None of the above

Explanation:

If a parallel line algorithm has 'n' processes then this algorithm divides it into a number of partitions and generates line segments. Thus the load on the processors gets divided.

20. Consider the following statement:

"The boundary is specified in a single color, and the algorithm proceeds pixel by pixel until the boundary color is encountered."

The above statement defines which of the following algorithms?

1. Scan-line fill algorithm
2. Boundary-fill algorithm
3. Entire fill algorithm
4. Slide curve algorithm

Explanation:

Mainly, this algorithm proceeds outward pixel by pixel until the boundary color is encountered. Hence, the given statement definition correctly defines the Boundary fill algorithm.

21. In Bressenham’s line algorithm, there are certain conditions for deciding the successive parameters. Of the distances d1 < d2 then decision parameter Pk is which of the following?

1. Positive
2. Equal
3. Negative
4. Can be any of the above

Explanation:

If d1 < d2 then the decision variable is always negative.ie. Pk is always negative.

22. The term "DDA" in the DDA algorithm stands for:

1. Digital difference analyzer
2. Direct differential analyzer
3. Digital differential analyzer
4. Data differential analyzer

Explanation:

DDA stands for Digital differential analyzer which is use to draw a line.

23. What are the fundamental characteristics of a straight line?

1. Width
2. Color
3. Type
4. All of the mentioned above

Answer: d. All of the mentioned above

Explanation:

Type, width and colors are the fundamental characteristics of a line.

24. ___ is a method of moving an entity from one coordinate point to another into a straight-line path is known as positioning.

1. Shearing
2. Reflection
3. Translation
4. Transformation

Explanation:

An object is translated as it is repositioned in a straight-line path from one co-ordinate point to another.

25. |m|<1,? X for lines with a slope magnitude of,

1. A set proportional to a small horizontal deflection voltage
2. A set corresponding vertical deflection
3. Only B
4. All of the mentioned above

Answer: a. A set proportional to a small horizontal deflection voltage

Explanation:

? Only if the slope magnitude is small enough, x may be a range equal to a small horizontal deflection voltage |m| < 1.

26. Which of the following does not represent a line pattern?

1. Dark line
2. Dotted line
3. Dashed line
4. None of the mentioned above

Explanation:

A dark line does not represent a line pattern.

27. Which of the following line-generating algorithms is the most effective and efficient?

1. Midpoint algorithm
2. Bresenham's Line algorithm
3. DDA algorithm
4. None of the mentioned above

Explanation:

Since it only requires integer addition, subtractions, and multiplication operations, Bresenham's line algorithm is a quick process. These operations can be completed easily, allowing lines to be produced quickly.

28. The main role of a frame buffer is the ___ of the video signals that drive the display device.

1. Storage, conditioning, and output
2. Same speed
3. Different speed
4. None of the mentioned above

Answer: a. Storage, conditioning, and output

Explanation:

The main role of a frame buffer is the Storage, conditioning, and output of the video signals that drive the display device.

29. The ___ between the strong regions equal to the duration of the dashed lines.

1. Very short dashes
2. Inter dash spacing
3. Both A and B
4. None of these

Explanation:

The inter dash spacing between the strong regions equal to the duration of the dashed lines.

30. Can a dotted line be seen by generation using,

1. Short dash spacing
2. Long dash spacing
3. Inter dash spacing
4. Dots

Explanation:

The inter dash spacing is equal to the length of the solid sections displays dashed line.

31. Which of the following sentence used in application software to specify line-type attributes?

1. SETLINE ()
2. SETLINE TYPE (lt)
3. Both of the above mentioned
4. None of the above mentioned

Answer: d. None of the above mentioned

Explanation:

Quite long dashboards with equivalent or greater spacing than the dash will display dotted lines.

32. A line can be seen by,

1. Two points
2. One point
3. Four points
4. Three points

Explanation:

Two points may be found on a line to mark it. It is represented symbolically by an overhead bar of two letters referring to a dot on the line at either end.

33. Which of the following is defined by the number of pixels present in the frame buffer?

1. Resolution
2. Depth
3. Both a. and b.
4. None of the above

Explanation:

The number of pixels in the frame buffer determines the resolution of the image.

34. Consider the following statement:

"The limited range of number of points that can be displayed without overlap on a CRT."

Determine whether the given condition is true or false.

1. True
2. False
3. Can't be determined

Explanation:

The given statement is true as maximum number of points can be displayed without overlap on a CRT, and is called as Resolution.

35. Which of the following defines the mapping of points from some domain to bits?

1. Pix-map
2. Graph
3. Bitmap
4. All of the mentioned

Explanation:

Bit map frame buffer is always 1 bit per pixel and it defines the mapping of points from domain to bits. It is also referred to as a bit array.

36. Which of the following statements best define Scan conversion?

1. The process of digitizing a known picture definition into a set of pixel-intensity for storage in the frame buffer.
2. Encoding the pixels into bits
3. Converting the draw able image into a graphical image
4. None of the above

Answer: a. The process of digitizing a known picture definition into a set of pixel-intensity for storage in the frame buffer.

Explanation:

The process of digitizing a given picture definition into a set of pixel-intensity for storage in the frame buffer is called Scan conversion.

37. In which of the following parts of the cathode ray tube, is a huge amount of heat released to the cathode by directing a current through a coil of wire?

1. Electron gun
2. Phosphorus coated tube
3. Filament
4. Anode and cathode

Explanation:

In CRT, the filament is responsible to supply power when an electron gun release the electron then it focusing to hit the phosphorus screen to display the picture.

38. In a graphical user interface, the most common input device is,

1. Mouse
2. Keyboard
3. Monitor
4. Joy stick

Explanation:

Nowadays, a mouse is a most widely used input device. It enables the user to give commands to the computer system by simply clicking. A mouse has two buttons left and right, these are used as per need.

39. Which display device allows a user to move around an object and can be shown it from different angles?

1. Flat Panel Display Devices
2. Direct View Storage Tubes
3. 3D Devices
4. CRT

Explanation:

The usage of 3D display devices helps the consumer to display an object from different angles.

40. Which devices provide the graphics framework with positional data?

1. Output devices
2. Storage devices
3. Input devices
4. Both B and C

Explanation:

Input devices are the devices which provide the graphics framework with positional data.

41. DVST stands for

1. Direct View Storage Tube
2. Digital View Storing Time
3. Direct Visual Storing Tube
4. Digital View Storage Tube

Answer: a. Direct View Storage Tube

Explanation:

DVST stands for Direct View Storage Tube. DVST is a graphical display device that didn't need to be refreshed to keep an image.

42. The amount of pixels contained in a graphics system's frame buffer is referred to as,

1. Resolution
2. Screen Size
3. Screen Color
4. None of the above mentioned

Explanation:

A screen resolution can be determined by the number of pixels. If a display system contains good quantity of pixels, it means the visibility of the screen will be highly clear.

43. An instrument that transforms electrical energy into light are referred to as,

1. Liquid Crystal Display
2. Light Crystal Display
3. Liquid Crystal Diode
4. None of the above mentioned

Explanation:

Liquid Crystal Display transforms electrical energy into light.

44. Raster Scan Displays is used to describe,

1. Screen
2. Display
3. Matrix
4. Array

Explanation:

Raster Scan Display is based on television technology.

Raster Scan Display is a type of most common graphics monitor. In this system an electron beam sweeps across the system screen from top to bottom manner and covers one row at a time.

45. The translation of a specified picture description into a series of pixel-intensity values for storage in the frame buffer is known as digitization, it is also known as ...,

1. Scan conversion
2. Randomization
3. Rasterization
4. Encoding

Explanation:

The translation of a specified picture description into a series of pixel-intensity values for storage in the frame buffer is known as digitization, it is also known as Scan conversion.

46. A most suitable feature of a Graphics Card is to,

1. Send graphical data to the output unit
2. Receive graphical data to the input unit
3. Send graphical data from output unit
4. Receive graphical data to the output device

Answer: a. Send graphical data to the output unit

Explanation:

The Graphics Card is used to send graphical data to the output unit.

47. In a graphics system, the most prominent output device is,

1. VDU (Visual Display Unit)
2. Printer
3. Joystick
4. None of the above mentioned

Answer: a. VDU (Visual Display Unit)

Explanation:

In a graphics system, the most prominent output device is a VDU (Visual Display Unit).

48. Which controller is used in the frame buffer?

1. Display controller
2. Data controller
3. Digital controller
4. None of the above mentioned

Explanation:

A frame buffer is an area of memory used to store detail description about the display of pixels. Data controller is used in the frame buffer.

49. RGB models are used for,

1. Graphical display
2. Graphical error
3. Graphical system
4. None of the above mentioned

Explanation:

The model's name is formed from the letters R, G, and B, which stand for the three-additive primary colors Red, Green, and Blue. The RGB colour model is mainly used in electronic systems for image sensing, representation, and display.

50. A display controller converts 0s and 1s to the ...

1. Display Devices
2. Video signal
3. Text wrapping
4. None of the above mentioned

Explanation:

The display device's function is regulated by the Display Controller. A video display controller is an integrated circuit which is a main component of a video signal generator.

51. A video display device with the smallest height, lowest power usage, and lightest weight is -

1. LED display device
2. CRT display device
3. Flat panel display device
4. None of the above mentioned

Explanation:

A flat-panel display is a type of video display that has a smaller size, weight, and power consumption than a CRT display.

52. A graphic systems core hardware components are,

1. Display Processor and CPU
2. Output device and Input
3. Display devices, recorder
4. None of above mentioned

Answer: a. Display Processor and CPU

Explanation:

The core hardware components of graphic systems are Motherboard, CPU, RAM Memory, IO Machine, Power Supply; Video Monitor Controller, Bus, And Hard Disc Drive.

53. What are Random scan and Raster scan techniques?

1. Techniques to display an image on the screen
2. Line Drawing Techniques
3. Polygon Drawing Techniques
4. None of the above

Answer: a. Techniques to display an image on the screen

Explanation:

The Random scan and rater scan are the display techniques using which (any one) an image is displayed on the screen.

54. Which among the following is best suited for a smooth line drawing on the screen?

1. Random Scan Display Algorithm
2. Raster Scan Display Algorithm
3. Both a. and b.
4. None of the above

Answer: a. Random Scan Display Algorithm

Explanation:

The Random scan display algorithm is best suited for line drawing because it uses an electron beam which operates like a pencil to create a line on the screen.

55. Which among the following is best suited for a realistic shaded image drawing on the screen?

1. Random Scan Display Algorithm
2. Raster Scan Display Algorithm
3. Both a. and b.
4. None of the above

Answer: b. Raster Scan Display Algorithm

Explanation:

The Raster scan display algorithm is best suited for realistic shaded drawing because it is works upon the intensity of the pixels. Hence, the value of every pixel is assigned from the starting pixel to the ending one. Hence, a shaded realistic image can be best drawn using this technique.

56. Which of the following options is correct in accordance with the Random Scan Display Algorithm?

1. It is best suited for line drawing algorithm.
2. It has a high resolution.
3. It has an electron beam which strikes only that part of the screen where the drawing is needed.
4. All of the above

Answer: d. All of the above

Explanation:

All the given options are correct in accordance to the random scan display technique in a Cathode Ray tube.

57. Which among the following are the types of scanning or travelling of beam in a raster scan display technique?

1. Interlaced Scanning
2. Non- Interlaced Scanning
3. Spiral Scanning
4. All of the Above

Explanation:

There is no scanning technique such as spiral scanning in the rater scan display technique.

58. In ___ a beam of an electron is moved across the screen. It moves from top to bottom considering one row at a time.

1. Raster Scan Display
2. Random Scan Display
3. Both A and B
4. None of the above mentioned

Explanation:

In Raster Scan Display a beam of an electron is moved across the screen. It moves from top to bottom considering one row at a time.

59. A beam of electron moves through each row, its intensity is alternatively turned ___ which helps to create a pattern of spots that are illuminated.

1. On and off
2. Power interrupt
3. Up and down
4. All of the above mentioned

Explanation:

A beam of electron moves through each row, its intensity is alternatively turned On and Off which helps to create a pattern of spots that are illuminated.

60. Which of the following is a better option for drawing a smooth line on the screen?

1. Raster Scan Display
2. Random Scan Display
3. Both A and B
4. None of the above mentioned

Explanation:

Since it uses an electron beam which acts like a pencil to build a line on the panel, Random scan display is ideally adapted for line drawing.

61. A 900 rotation can be done using the raster scan technique for transformation ___

1. Using coping every row of a block into a column in a new frame buffer location
2. Using drawing a line
3. Using refresh a frame buffer
4. None of the above mentioned

Answer: a. Using coping every row of a block into a column in a new frame buffer location

Explanation:

A 900 rotation can be done using the raster scan technique for transformation using coping every row of a block into a column in a new frame buffer location.

62. In ___ a beam of the electron is directed only to the screen areas where any picture has to be displayed or drawn on the screen.

1. Video Display
2. Raster Scan Display
3. Random Scan Display
4. All of the above mentioned

Explanation:

In Random Scan Display a beam of the electron is directed only to the screen areas where any picture has to be displayed or drawn on the screen.

63. The resolution of random scan is higher than raster scan.

1. True
2. False

Explanation:

The resolution of random scan is higher as compare to raster scan.

64. Raster scan systems generally use ___ to display an image.

1. Frame buffer
2. Display controller
3. Display file program
4. None of the These

Explanation:

In a raster scan system, an electron beam sweeps through the panel, one row at a time, from top to bottom. In his process a frame buffer uses.

65. With reference to Random Scan Display, which of the following options is correct?

1. It has an electron beam that directed only to the screen areas where any picture has to be displayed.
2. It has a good pixel amount.
3. It's ideal for line drawing.
4. All of the above mentioned.

Answer: d. All of the above mentioned.

Explanation:

In the Random Scan Display technique, it has an electron beam that directed only to the screen areas where any picture has to be displayed. Random Scan Display has a good pixel amount and also an ideal method for line drawing.

66. Which one of the following does not fit for Random Scan and Raster Scan?

1. Polygon Drawing Techniques
2. Line Drawing Techniques
3. Techniques to display an image on the screen
4. Only A

Explanation:

Random scan and rater scan are two display methods that can be used to display image on the screen.

67. With reference to Random Scan Display the beam of electron moves to the left top corner of the screen to move to another frame. This motion is referred to as ___

1. Vertical retrace
2. Horizontal retrace
3. Scan line
4. All of the above mentioned

Explanation:

With reference to Random Scan Display, the beam of electron moves to the left top corner of the screen to move to another frame. This motion is referred to as Vertical retrace.

68. Which of the following best defines Scan Conversion in computer graphics?

1. It is a process of representing graphics objects as a collection of pixels
2. It is a process of converting colored images to grayscale images.
3. It is a process of converting handmade drawing to computer pictures through a scanner
4. None of the above

Answer: a. It is a process of representing graphics objects as a collection of pixels

Explanation:

All the other definitions are wrong as per defining the Scan Conversion in computer graphics.

69. What is the main reason behind developing algorithms for scan conversion?

1. The algorithms can generate graphics objects at a faster rate here.
2. Here, the memory can be efficiently used
3. Both a. and b.
4. None of the above

Answer: c. Both a. and b.

Explanation:

The algorithms are being developed in the Scan conversion technique because of its faster rate of generation of objects and efficient use of memory.

70. Which among the following objects can be scan converted?

1. Point, Line, Sector, Arc
2. Characters
3. Ellipse, Rectangle, Polygons
4. All of the above

Answer: d. All of the above

Explanation:

All the mentioned objects can be scan converted. Hence the correct option is: d. All of the above.

71. Stare whether the following statement is true or false
"The term pixel is a short form for Electronic Picture."

1. True
2. False

Explanation:

The term pixel is not the short form for electronic picture. Rather, it is an abbreviation for 'Picture Element'.

72. Fill in the blank:
"Each pixel has some intensity value which is represented in memory of the computer. This memory part is known as the ____________."

1. Frame Buffer
2. Random Access Memory (RAM)
3. Picture Memory
4. None of the above

Explanation:

Frame buffer is a storage area for storing pixel values.

73. What is the formula for calculating the slope 'm' of a line?

1. m = dx / dy
2. m = dy / dx
3. y = mx + c
4. None of the above

Answer: b. m = dy / dx

Explanation:

The slope of a straight line is calculated using the following:

```m = (y2 – y1) / (x2 – x1)
m = dy / dx
```

74. Which of the following is a line drawing algorithm?

1. Line equation algorithm
2. Digital Differential Analyzer (DDA) algorithm
3. Bressenham's algorithm
4. All of the above

Answer: d. All of the above

Explanation:

All the mentioned algorithms: Line equation algorithm, the DDA algorithm and the Bressenham's line drawing algorithm are used for line drawing in computer graphics.

75. Which of the following statements is not true with respect to the Digital Differential Analyzer (DDA) algorithm?

1. It is an incremental method of scan conversion of line
2. In this method, calculation is performed at each step but by using the results of previous steps.
3. This algorithm can also be used to draw circle
4. None of the above

Answer: c. This algorithm can also be used to draw circle.

Explanation:

The DDA algorithm is applicable only for line drawing. Circle cannot be drawn using this algorithm. For circle drawing, there are other algorithms available like the mid-point circle drawing algorithm, etc.

76. Which of the following options is not correct according to the definition of Bresenham's line drawing algorithm?

1. It gives a close approximation of points of line by determining n-dimensional raster that should be selected.
2. It is an incremental error algorithm.
3. It gives exact line points.
4. None of the above

Answer: c. It gives exact line points

Explanation:

It gives a close approximation of points of line by determining n-dimensional raster that should be selected.

77. "The Digital Differential Analyzer (DDA) algorithm is an incremental method of scan conversion of line."
Based upon the above statement, determine whether the following condition is true or false.
"The DDA algorithm uses the results of previous step for determining the value of the next step."

1. True
2. False

Explanation:

As the DDA algorithm is an incremental algorithm, it uses the previous values for determining the next values.

78. What is the equation for a circle?

1. y = mx + c
2. y2 = r2 – x2
3. rx2y2 = rx2ry2 - ry2x2
4. None of the above

Answer: b. y2 = r2 – x2

Explanation:

The Equation of circle is:

```x2 + y2 = r2
y2 = r2 – x2
```

79. Which among the following is the correct equation for an ellipse?

1. y = mx + c
2. y2 = r2 – x2
3. rx2y2 = rx2ry2 - ry2x2
4. None of the above

Answer: c. rx2y2 = rx2ry2 - ry2x2

Explanation:

The Equation of an ellipse is:

```ry2x2 + rx2y2 = rx2ry2
rx2y2 = rx2ry2 - ry2x2```

80. Which of the following properties is followed by the ellipse?

1. 4 – symmetry property
2. 8 – symmetry property
3. 6 – symmetry property
4. All of the above

Answer: a. 4 – symmetry property

Explanation:

An ellipse is identical through all its quadrant values. i.e., if you place the origin at the center of the ellipse, then it will have the mirror images for its points on all the four quadrants. Hence, the ellipse is said to have the 4-symmetry property.

81. Which of the following are the methods to define a circle?

1. Using polynomial method.
2. Using polar coordinates methods.
3. Both a. and b.
4. None of the above

Answer: c. Both a. and b.

Explanation:

A circle can be defined from both the stated options: Using the polynomial method as well as the polar coordinates method.

82. "The mid-point algorithm is used for both circle drawing as well as ellipse drawing, but the procedure is different for both of them."
Based upon the above statement, determine whether the following condition is true or false.
"The circle follows 8 - symmetry property whereas the ellipse follows 4 – symmetry property."

1. True
2. False

Explanation:

The circle is identical along all its octants whereas an ellipse is identical long all its quadrants. Hence the given statement: "The circle follows 8 - symmetry property whereas the ellipse follows 4 – symmetry property" is true.

83. Why does a circle drawn on a computer screen look elliptical?

1. Because of its elliptical nature
2. Because CRTs design is elliptical
3. It is due to the ratio aspect of computer monitor
4. None of these

Answer: c. It is due to the ratio aspect of computer monitor

Explanation:

The screen aspect ratio, a circle drawn on the panel seems to be elliptical.

84. With reference to properties of a circle, a circle is defined as a set of points that are all the given distance (xc ,yc).

1. True
2. False

Explanation:

A circle is defined as a set of points that are all the given distance (xc ,yc).

85. An ellipse consists of two axes: major and minor axes where the major axis is the longest diameter and minor axis is the shortest diameter.

1. True
2. False

Explanation:

From the image plane, an ellipse consists of two axes: major and minor axes. The major axis is the longest diameter and minor axis is the shortest diameter. Each end of the major axis is the vertex, and each end of the minor axis is the co-vertex of the ellipse.

86. During a circle creation using Bresenham's algorithm, it is usually simple to generate a circle?

1. One octant first and other by successive translation
2. One octant first and other by successive reflection
3. Both A and B
4. None of the above mentioned

Answer: b. One octant first and other by successive reflection

Explanation:

Only one octant is needed in Bresehnam's algorithm, and the remaining octants can be obtained by successive reflection.

87. In computer graphics, the mid-point ellipse algorithm is an ___ of drawing an ellipse.

1. Elliptical method
2. Decremented method
3. Circulation method
4. None of the above mentioned

Answer: d. None of the above mentioned

Explanation:

In computer graphics, the mid-point ellipse algorithm is an Incremental method of drawing an ellipse.

88. Midpoint ellipse algorithm plots points of an ellipse on the first quadrant by dividing the quadrant into two regions.

1. True
2. False

Explanation:

A midpoint ellipse algorithm plots points of an ellipse on the first quadrant by dividing the quadrant into two regions.

89. In the following figure, which one will be the appropriate pair of coordinates in the blanks?

1. (-x, y)
2. (x, -y)
3. (-x, -y)
4. (x, y)

Explanation:

(-x, y) will be the correct pair of coordinates.

90. The value of the decision parameter determines whether the mid-point lies ___ boundary and the then position of the mid-point help in drawing the ellipse.

1. At boundaries
2. Inside, outside, or on the ellipse
3. Only inside the boundaries
4. Only outside the boundaries

Answer: b. Inside, outside, or on the ellipse

Explanation:

The value of the decision parameter determines whether the mid-point lies Inside, outside, or on the ellipse boundary and the then position of the mid-point helps in drawing the ellipse.

91. Which of the following method/methods are used to get and set the location of a pixel, object or text in a desktop's active area?

1. Gravity field method
2. Basic positioning method
3. Only A
4. None of The Above

Explanation:

In the active region of a desktop, basic positioning methods are used to get and set the location of a pixel, point, or document.

92. The ___ of the circle is often used by the midpoint circle drawing algorithm to produce.

1. Two-way symmetry
2. Six-way symmetry
3. Eight-way symmetry
4. None of the mentioned above

Explanation:

The two-way symmetry is used to create a circle in the midpoint circle drawing algorithm.

93. Let R be the circumference of a circle. The angle created by an arc of length R at the circle's middle is?

2. 90 degree
3. 60 degree
4. 1 degree

Explanation:

One radian is the angle generated by wrapping a circle's radius around its circumference.

94. To draw a perspective image of a globe, first enclose the circle in ___ then add pointing points, and so on.

1. Circle
2. Rectangle
3. Ellipse
4. All of the mentioned above

Explanation:

The circle can be enclosed in a square to achieve points on an ellipse, and the midpoints of the sides and intersection of diagonals with the circle are 8 points. Parallel to the square's edges, lines are traced along these stages.

95. ___ is defined as a group of points where the sum of the distances for all points is the same.

1. Lines
2. Dots
3. Only A
4. Ellipses

Explanation:

Ellipses are a set of lines.

96. The orientation of a picture plane in relation to the source is unaffected by the perspective view's distance.

1. True
2. False

Explanation:

If an entity is set behind the picture plane, it will appear smaller in perspective. The height of the viewpoint would rise as the object is brought closer to the picture plane, and vice versa.

97. At any point (x, y) on the boundary of the circle with radius r satisfies the equation fcircle (x,y)=0. If the point is in the interior of the circle, the circle function is negative while if the point is outside the circle the, circle function is ___

1. Positive
2. Also negative
3. May be positive or negative
4. None of the above mentioned

Explanation:

With reference to circle equation fcircle (x, y) = 0. If the point is in the interior of the circle, the circle function is negative while if the point is outside the circle the, circle function is positive.

98. In which of the following transformation methods of Computer Graphics is the Shape of the Object not deformed?

1. Translation
2. Shearing
3. Both a. and b.
4. None of the above

Explanation:

The movement of objects without deforming the shape of object is called Translation.

99. Translation equation:
x1 = x + Tx
y1 = y + Ty
What is another name for the Translation pair (Tx, Ty)?

1. Shift Vector
2. Shift Coordinates
3. Translation points
4. None of the above

Explanation:

The translation pair (Tx, Ty) is called as the shift vector.

100. What value of the rotation angle rotates the object in clockwise direction?

1. Positive Value
2. Negative value
3. Value less than 180 degree
4. All of the above

Explanation:

The positive value of the rotation angle rotates an object in an anti-clockwise direction while the negative value of the rotation angle rotates an object in a clockwise direction.

101. Which of the following transformation techniques is responsible for altering (either enlarging it or diminishing it) the size of the object?

1. Translation
2. Rotation
3. Scaling
4. None of the above

Explanation:

Scaling is be used to increase or decrease which is reduce the size of object. Scaling subjects to the co-ordinate points of the original object is to be changed. The scaling factor determines whether the size of the object is to be increased or decreased.

102. "There are three basic transformation techniques in Computer Graphics to alter an object. They are: Translation, Rotation and Scaling."
Based upon the above statement, determine whether the following condition is true or false.
"In all these three transformation types, the shape of the object is never deformed."

1. True
2. False

Explanation:

The Shape of the object does not get deformed in any of the transformation techniques: translation, rotation or scaling. In translation, we just move the object from one place to another. In rotation, the object is rotated as it is according to the required angle of rotation. In scaling, we just enlarge or diminish the size of the object without interfering with its shape.

103. The term "transformation" refers to the process of applying a translation to an entity.

1. It's being repositioned around a circle lane
2. Repositioning it along with straight line path
3. Only A
4. None of these

Answer: b. Repositioning it along with straight line path

Explanation:

An entity is converted as it is repositioned in a straight-line path from one spot to another.

104. ___ is a rigid body transformation that enables an entity to shift without deforming.

1. Rotation
2. Translation
3. Only B
4. None of the above

Explanation:

Translation is a deformation-free rigid body transformation that transfers objects.

105. The colour transformation is performed in the centre of the process___

1. Dual color model
2. Single color model
3. Rotation color model
4. None of these

Explanation:

A single colour model is a colour transformation process.

106. What is a necessary to specify to generate rotation?

1. Specific distances between dx and dy
2. Rotation angle ϴ
3. Scaling
4. Repositioning

Explanation:

In order to rotate an object, we must specify the position of its pivot or pivot angle, either the rotation point or its height, or the magnitude of the rotation, and an angle relative to the pivot.

107. The distances between two points (dx, dy) are referred to as translation distances (dx, dy).

1. Translation vector or Shift vector
2. Translation difference
3. Only B
4. None of these

Answer: a. Translation vector or Shift vector

Explanation:

The translation vector or shift vector is described as the distances (dx, dy) from the original location.

108. The transformation set is also known as,

1. Translation difference
2. Rotation colour model
3. Colour Mapping Functions
4. None of these

Explanation:

Transformations are another name for colour mapping functions.

109. A two-dimensional point is transformed by inserting.

1. Translation vector
2. Shift vector
3. Translation distances
4. Both A and B

Explanation:

By inserting localization distances dx and dy we can convert 2D points.

110. The transformation of the entity in relation to an axis is called the reflection image.

1. Reflection
2. Translation
3. Only A
4. Only B

Explanation:

A transformation that creates a mirror image of an entity relative to an axis of reflection is called a reflection.

111. Which of the following is a matrix form of 2D translation equation is,

1. P'=R*P
2. P'= P + R
3. P'= P / R
4. None of the above mentioned

Explanation:

A matrix form of 2D translation equation is P'=R*P.

112. We set all scale factors to reduce the object's dimension.

1. Greater than 0
2. Less than 1
3. in Between 0 and 1
4. None of the Above

Answer: c. in Between 0 and 1

Explanation:

To scale a polygon, multiply the product of each vertex's (x, y) by the scaling factor sx and sy to get the transformation coordinates.

113. The fundamental geometric transformations are as follows:

1. Scaling
2. Translation
3. Rotation
4. All of the Above

Explanation:

Other transformations include reflection and shear, which are simple geometric transformations.

114. A line segment of a polygon may also be referred as,

1. Line
2. Vertices
3. Edges
4. All of the mentioned above

Explanation:

A line segment of a polygon may also be referred as Edges.

115. An efficient transformation method which produces a parallel mirror image of an object is also referred as,

1. Rotation
2. Reflection
3. Shear
4. All of the mentioned above

Explanation:

An efficient transformation method which produces a parallel mirror image of an object is also referred as reflection.

116. An efficient transformation method in which an object may shift form one coordinate position to any other coordinate position in a three-dimensional plane -

1. Rotation
2. Translation
3. Scaling
4. All of the mentioned above

Explanation:

Translation is an efficient transformation method in which an object may shift form one coordinate position to any other coordinate position in a three-dimensional plane.

117. A transformation method which may cause the change in a shape of an object is referred as,

1. Rotation
2. Scaling
3. Reflection
4. Shear

Explanation:

Shearing is a transformation method which may cause the change in shape of an object.

118. Amongst which one of the most basic transformation methods which may applied in three-dimensional planes -

1. Rotation
2. Translation
3. Scaling
4. All of the mentioned above

Answer: d. All of the mentioned above

Explanation:

Rotation, Translation and Scaling are some of the most basic transformation methods which may apply in three-dimensional planes.

119. Which of the following is true with respect to the Bresenham's line drawing algorithm?

1. It overcomes the drawbacks of DDA line drawing algorithm
2. The DDA algorithm was proposed to overcome the limitations of Bresenham's line drawing algorithm
3. Both a. and b.
4. None of the above

Answer: a. It overcomes the drawbacks of DDA line drawing algorithm

Explanation:

The Bresenham's algorithm was proposed in order to overcome the drawbacks of the DDA algorithm.

120. Why is the complexity of Bresenham's line drawing algorithm less than that of DDA line drawing algorithm?

1. It uses floating point operations over integer addition and subtraction
2. It considers only selected ranged inputs
3. It uses integer addition and subtraction over floating point operations
4. None of the above

Answer: c. It uses integer addition and subtraction over floating point operations

Explanation:

The only drawback of DDA algorithm was that it produces floating point results which increases the overall complexity. This algorithm is used for calculating intermediate coordinate points between the given source and ending points by only using integer addition and subtraction.

121. Which of the following properties is followed by the Bresenham's algorithm?

1. It is an incremental method
2. It chooses points randomly
3. It uses floating point operations
4. All of the above

Answer: a. It is an incremental method

Explanation:

Bresenham's algorithm is an incremental method, i.e. we increment one of the coordinates of the point and calculate the other coordinate according to it. In this manner we find all the points of that particular polygon.

122. Which of the following are true with respect to the Bresenham's algorithm?

1. It produces smooth polygons
2. The results of this algorithm are 100 percent accurate.
3. Due to integer operations, it's complexity gets reduced
4. All of the above

Answer: c. Due to integer operations, it's complexity gets reduced.

Explanation:

The Bresenham's algorithm has quite low complexity due to its integer-based operations.

123. "This algorithm is more accurate than any other circle drawing algorithms as it avoids the use of round off function."
Based upon the above statement, determine whether it is true or false.

1. True
2. False

Explanation:

The given statement is true.

124. Which of the following ports resembles the coordinates from the real-world system?

1. Window port
2. View Port
3. Universal Port
4. None of the above

Explanation:

A world coordinate area selected for display is called a window port. A window defines a rectangular area in the world coordinates.

125. The process of transforming a 2D world-coordinate object to device coordinates is termed as:

1. Window to Viewport Transformation
2. Viewing Transformation
3. Windowing Transformation
4. All of the above

Answer: d. All of the above

Explanation:

The process of mapping the window port to view port is termed as 'Window to view port Transformation'. It is also known as 'Viewing Transformation' or 'Windowing Transformation'.

126. Can we represent multiple scenes from a real-world coordinate system on the viewport? If yes, how?

1. By using multiple viewports
2. By using multiple window ports
3. Both a. and b.
4. No, we cannot represent multiple scenes from a real-world coordinate system on the viewport

Answer: a. By using multiple viewports

Explanation:

To display different sections of the scene, we use multiple viewports so that different sections can be displayed on different parts of the screen.

127. Which of the following are true with respect to the Window Port in computer graphics?

1. It represents real world coordinate system.
2. A window port can be defined with the help of a GWINDOW statement.
3. Window port is the coordinate area specially selected for the display.
4. All of the above

Answer: d. All of the above.

Explanation:

All the given statements are true according to the window port in computer graphics.

128. "The viewport is an area expressed in rendering device specific coordinates, e.g. pixels for screen coordinates, in which the objects of interest are going to be rendered."
Based upon the above statement, determine whether it is true or false.

1. True
2. False

Explanation:

A viewport is a polygon viewing region in computer graphics which represents our device's screen. Hence, the given statement is true.