Computer Graphics

End product of computer graphics isPhotoPictureMovieAll of the above

Pictures are represented inComputer architectureComputer organization Computer graphicsAll of the above

____ is a graphical componentDigital memoryTelevision monitorDisplay controllerAll of the above

The image must be passed repeatedly to the monitor ____ a seconds.30<30>30Seconds

Inside the frame buffer the image is stored as a pattern of digital numbers.OctalBinaryHexadecimalDecimal

The segment names are usually taken asCharactersNumbersAlphanumericNone of the above

___ are used in common television sets.Random scan CRTRGB-CRTRaster scan CRTNone of the above

The most commonly used _____ devices are the CRT.InputOutputStorageNone of the above

The major Components of CRT isElectron gunPhosphorous coated screenControl electrodes

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Deflection yokeAll of the above

_____ causes elections to congregate at the end of electron gum.HeaterCathodeBoth a and bNone of the above

There is a ____ coating on the inside front of every CRT.NitrogenPhosphorousHydrogenAll of the above

The glow given off by the, phosphor during exposure of the electron beam is known as ____FluorescencePhosphorescencePersistenceAll of the above

The continuing glow given off after the beam is removed is known as.FluorescencePhosphorescencePersistenceAll of the above

An example of image space method algorithm is Back Face detection methodPainter’s AlgorithmScan line Algorithm All of the above

Raster is a synonym for the termArrayMatrixModelAll of the above

Each byte is composed of _________ bits.24816

The majority of _____ systems assign 1 bit in the memory map to one pixel on the displayMonochromaticDichromaticPoly chromaticTri-chromatic

Most display terminals provide the uses with ____ keyboardAlphabetic2 | P a g e

NumericAlpha numeric All of the above

Two types of graphical interaction areaPartitioning and positioningPartitioned and paintingPositioning and pointingNone of the above

The process of determining which pixels will provide the better approximation to the desired line is known asScan conversion RandomizationRasterizationRecreation

21 & 22 Consider the following figure.

Which of the following five line segments can be trivially rejected on the first pass of Cohen-Sutherland line clipping?ABCDEFGHIJ

Answer Questions 21) and 22) using the following.Consider the line which starts at (5, 14) and ends at (21, 2).

How many pixels will there be in this line?1216242010

With the DDA (Digital Differential Analyzer) algorithm, what will be the amount added to the secondary component each time through the loop (incrementing value)?-1/23/4-3/43 | P a g e

1/2-4/3

Techniques of transformation one object into another is known asTranslationMorphingScalingNone of the above

In DDA algorithm when the value of m>1 we sample atunit x intervalsunit y intervalstwice x intervaltwice y interval

A many sided closed figure is known aspolygoncirclearrayline

Among the following, which is the output of Line rasterization algorithm (Bresenham) for a line segment with end points (0,0) and (5,3)?(a) (0,0), (1,0), (2,1), (3,1), (4,2), (5,3)(b) (0,0), (1,1), (2,1), (3,2), (4,2), (5,3)(c) (0,0), (1,1), (2,2), (3,2), (4,3), (5,3)(d) (0,0), (1,0), (2,0), (3,1), (4,2), (5,3)(e) (0,0), (0,1), (2,0), (3,1), (4,2), (5,3)

A pixel from where we start filing the polygon is known as:a. PEL b. ROOTc. SEED d. None of the above

If you rotate the point (20,30) by 90 degrees anticlockwise and then translate it by (-20,0) and then scale it by (2,1), where will the point be?(100,-20) (100,-20) (100, 10) (-100,20) (100,20)

During 2D rotations, clockwise direction means angle isa. +ve b. -vec. both a and b d. none of the above

The initial size of the segment will bea. zero b. onec. two d. none of the above

The value of decision parameter while scan converting a circle by midpoint circle algorithm m is4 | P a g e

a. r-1 b. 1-rc. r+1 d. r-1 The process of calculating the product of matrix of a number of different transformations in a sequence is known asa. Composite transformation b. Transformationc. Translation d. none of the above Control electrode is connected to. a) Repeater b) Amplifier c) Both a and b d) None of the above

The process of changing the sizes, orientations or positions of any object by a mathematical operation is called asa. Rotation b. Scalingc. Transformation d. Translation An example of object space method algorithm is(a) Back Face detection method(b) Painter’s Algorithm(c) Roberts Algorithm(d) All of the above

The technique of maintaining two images is known asa. Double buffering b. Pagingc. Segmentation d. None of the above

A phosphor will no longer be fluorescent it is said to bea) Burned b) Buriedc) Browned d) All of the above

CRT stands fora) Cathode Ray tube b) Colored Ray tubec) Converted Ray Tube d) All of the above

The algorithm used to color an entire area of connected pixels with the same color is known asa. Flood fill b. Boundary fillc. line fill d. Forest free Q: 1- Computer graphics is a _________ and diversified technology.

a) Simple b) Complex c) Both a and b d) None of the above

Q: 2- End product of computer graphics is _________.a) Photo b) Picturec) Movie d) None of the above

Q: 3- The ____ is the fundamental cohesive concept in computer graphics.a) Picture b) Photoc) Movie d) All of the above

Q: 4- Pictures are represented in_________5 | P a g e

a) Computer architecture b) Computer organizationc) Computer graphics d) All of the above

Q: 5- ________ with the picture is accomplisheda) Iteration b) Reactionc) Interaction d) All of the above

Q: 6- Pictures are prepared for_______a) Presentationb) Preparationc) Provocation d) None of the above

Q: 7- The modern graphics display is _________ in construction.a) Difficult b) Simplec) Extremely Simple d) None of the above

Q: 8- Modern graphics consists of ______ componentsa) 1 b) 2c) 3 d) 4

Q:9- _______ is a graphical componenta) Digital memory b) Television monitorc) Display controller d) All of the above

Q: 10- The image must be passed repeatedly to the monitor ________ a seconds.a) 30 b) <30c) >30 d) Seconds.

Q: 11- Inside the frame buffer the image is stored as a pattern of ______ digital numbers.a) Octal b) Binaryc) Hexadecimald) Decimal

Q: 12- We wish to store only _____ imagesa) Colored b) Black and whitec) Both a and b d) None of the above

Q: 13- 16*16 array of black and white pixels could be represented by the binary values stored in the ______ bytes.

a) 16-8 bit b) 8-8 bitc) 32-8 bit d) 64-8 bit

Q: 14- The __ simply reads each successive byte of data from the frame buffer.a) Digital controller b) Data controllerc) Display controller d) All of the above

Q: 15- The display controller converts 0’s & 1’s in to corresponding________.a) Audio Signal b) Digital signal c) Analog signal d) Video signal

Q: 16- The change the displayed picture, all we need to do is modify the _________ to represent the new pattern of pixels.

a) Video Signal b) Digital Signalc) Audio signal d) Digital signal

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Q: 17- CRT stands for a) Cathode Ray tube b) Colored Ray tubec) Converted Ray Tube d) All of the above

Q: 18- ___ are used in common television sets.a) Random scan CRT b) RGB-CRTb) Raster scan CRT d) None of the above

Q: 19- The most commonly used ________ devices is the CRT.a) Input b) Outputc) Storage d) None of the above

Q: 20- The major Components of CRT isa) Electron gun b) Phosphorous coated screenb) Control electrodes d) Deflection yokef) All of the above

Q: 21- ________ causes elections to congregate at the end of electron gum.a) Heater b) Cathodec) Both a and bd) None of the above

Q: 22- The electron are accelerated by _______ of an electric field.a) Association b) Applicationc) Argumentations d) None of the above

Q: 23- _________ used to regulate the flow of elections in CRT.a) Electron gun b) Focusing electrodec) Control electrode d) All of the above

Q: 24- Control electrode is connected to _______.a) Repeater b) Amplifiesb) Both a and b d) None of the above

Q: 25- A Focusing electrode focuses the electrons in a narrow beam by exerting _____ force on the electrons in the electron beam.a) Magnetic field b) Electrostatic fieldc) Magnetic field d) All of the above

Q: 26- ______ is used to control the direction of electron beam in CRT.a) Phosphorous coated screen b) Focusing electrodec) Control Electrode d) Deflection yoke

Q: 27- There is a ____ coating on the inside front of every CRT.a) Nitrogen b) Phosphorousc) Hydrogen d) All of the above

Q: 28- The glow given off by the, phosphor during exposure of the electron beam is known as .a) Fluorescence b) Phosphorescencec) Persistence d) All of the above

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Q: 29- The continuing glow given off after the beam is removed is known as.a) Fluorescence b) Phosphorescencec) Persistence d) All of the above

Q: 30- A phosphor will no longer be fluorescent it is said to be_________a) Burned b) Buriedc) Browned d) All of the above

Q: 31- Raster is a synonym for the term_______.a) Array b) Matrixc) Model d) All of the above

Q: 32- The rate at which the electron beam seams the surface of the CRT is often directly related to the frequency of the _____ Voltage.a) Global line b) Static linec) Local line d) All of the above

Q: 33- In India ________ cycle line voltage is used.a) 40 b) 50c) 30 d) 80

Q: 34- Each time the election beam goes through a complete cycle of raster or scan lines, the CRT is said to be.a) Refreshed b) Flickeredc) Retrieved d) None of the above

Q: 35- The perceptual threshold is greater than the frequency of standard line voltage a technique Called ___ is often used.a) Interleaving b) Interweaving c) Interlacing d) All of the above

Q: 36- Refresh rate is significantly ___________ the phosphors persistence.a) Longer b) Smallerc) Equal to d) Extremely simple

Q: 37- An interlacing is used to _________ the raster –line cycle.a) Create b) Breakc) Exit d) None of the above

Q: 38- Over scan on the deft is called top ___ over scana) Vertical b) Horizontalc) Diagonal d) None of the above

Q: 39- Over-scan on the left is called left ____ over scana) Vertical b) Horizontalc) Diagonal d) None of the above

Q: 40- Each time the election beam scans from left to right it is an _______ modea) Read b) Writeb) Execute d) Cancel

The Pixel is the smallest piece of the display screen which can be controlled by setting ___________ and _____________

Intensity, color8 | P a g e

Extensive, high bandwidthPosition, shapeNone of the above

Interactive graphics permits ___________, __________ user computer interaction.Intensity, colorExtensive, high bandwidthPosition, shapeNone of the above

PHIGS ________________ supports nested hierarchial grouping of 3D premitives called _______________

Programmer’s Hierarchical Interaction graphics system, structure.Portable Hierarchical Interaction graphics standard, segmentParallel Hierarchical Interaction graphics system, structure.None of the above.

DVST __________ display colors and are available with _________ level of line intensity.Don’t , singleDo, singleDo, doubleDon’t double

The first graphics specification be officially standardized was __________ , when this became official standard it was called __________

GKS, PHIGSPHIGS, GKSDVST, PHIGSGKS, DVST

_________ gun stores the picture pattern & the _ gun maintain the picture display.Primary, secondaryFlood, boundaryPrimary, floodNone of these

In CRT, beam is moved left to right it is _____________- and when beam is moved from right to left, it is ________________

ON, OFFRaster, RandomOff, OnAll of the above

In Cartography, CG is used to represent _________--, weather maps, ______ , contour maps, population density maps and so on.

Geographic maps, oceanographic chartsPie charts, bar chartsHectographs, diagramAll of the above

With ______ dynomics it is possible to change shape & with ______ dynomics, user can move & tumble objects

Motion , updateDSP, CRT

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Update, motionNone of the above

In raster scan display, graphic primitives are specified in term of their ___________ & must be scan converted into their corresponding pixel in the ______________.

Endpt, frame bufferstartpt, frame bufferframe buffer, end pt.frame buffer, start pt.

Graphics workstatuion is the ________________ term for a graphical device that can display graphical output or accept graphical input or both. The graphics workstation is always supported with _______________

GKS, SoftwareCRT, VideoportSPHIGHS, HardwarePHIGHS, Software

Display Processor is also called _______________ or _______________Graphic controller, display co-processorGraphic processor, display controllerFrame Handle, CPU modularNone of the above

Scan lines are labeled from _____________, at the top of the screen to __________- bottom.Y, 0Y, XX,Y0, X

With resolution of 1024 x 1024 , a full color (____- bit per pixel) RGB system need, ______ MB of storage for frame buffer.

24, 316, 4256, 8All of the above

In color display, ________ bit per pixel are commonly used where 8 bits represent __________ levels for each color.

24, 25664, 25616, 12824, 128

It is necessary to read 24 bits of each pixel from frame buffer. To avoid this video controller uses ______ to store many enteries of pixel value in __________ format.

LUT, RGBFrame Buffer, CYMCYM, LUTLUT, Frame Buffer

To Provide flicker free display, the display processor has to execute its program ___ to ____ times per second.10 | P a g e

30, 6060, 9030, 5040, 60

With 3 bit per pixel we can accommodate __________ gray level, while 8 bit per pixel would give us _____ shade of gray.

8, 256256, 824 316, 1024

In visualization and image processing application __________ are convenient means for setting ____________ so that all pixel values above or below a specified thresholds can be set to same color.

Color table, color thresholdColor threshold, color tableColor lookup table, color intensityAll of the above

_______________ Procedure specifies how image are to be modified & control procedure specifies where the images are to be generated.

SRGP – copy pixel , canvasSRGP – mod pixel , LUTSRGP – edit pixel , frame bufferAll of the above

61) Match the following:Set 1 Set 2A. Simulation 1. Geographic mapsB. Cartography 2. Visual ControlC. CAV 3. Mathematical ModelD. User Interface 4. Automatic bodies

A-4, B-2, C-1, D-3A-1, B-2, C-3, D-4A-3, B-1, C-4, D-2A-3, B-2, C-4, D-2

62) Match the following:Set 1 Set 2A. User Interface 1. Remote control RoomB. Plottiy Graphics 2. Mouse ClickC. Office Automation 3. HistogramsD. Process Control 4. Desktop publishing

A-4, B-2, C-1, D-3A-2, B-3, C-4, D-1A-3, B-1, C-4, D-2A-3, B-2, C-4, D-2

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63) Match the following:Set 1 Set 2A. Application Model 1. Geometric descriptionB. Application Program 2. PHIGSC. Graphic system 3. Object attributeD. Structure 4. Database

A-4, B-3, C-1, D-2A-2, B-3, C-4, D-1A-3, B-1, C-4, D-2A-3, B-2, C-4, D-2

64) Match the following:Set 1 Set 2A. Kind of picture 1. DrawingB. Role of picture 2. SymbolicC. Type of Interaction 3. Color ImageD. Pictorial Representation 4. Controllable

A-4, B-3, C-1, D-2A-2, B-3, C-4, D-1A-2, B-1, C-4, D-3A-3, B-2, C-4, D-2

65) A Primary __________produces ____________speed electron which strike on the ___________ to draw picture pattern. The knocked out electrons are attracted towards the __________. Gun, High, storage grid, collector

Storage grid, flow, gun, screenSegments, high, structures, displayNone of the above

66) In the last 60’s __________ was introduced as display technology which gave an alternative method of screen ________. It uses __________ which store the picture information as a change distribution just behind the __________ coated screen.

DVST, Image, Storage grid, PhosphorCRT, Intensity, Storage Buffer, PhosphorCOR, Roaster, Storage Memory, InterpolarNone of these

67) ___________ display can produce mathematically smooth line of curved primitive only by ________ then with pixel on grid. Its cost is ___________ and it display areas filled with solid colors & _____________.

Random, Interpolating, Low, PatternRaster, approximating, low, patternReverse, inversely, high, methodNone of the above

68) GKS consist of CPU, display processor, ________, ___________, __________ and _________.Memory, display devices, recorder, plotterJoystick, Keyboard, light pen, scannerBoth a & bNone of these

69) GKS have a provision to interface _________ & _________-. The __________ & _________ are the main properties of the graphics workstation.

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Video camera, TV, Color, sizeVideo card, devices, plotter, light penMemory card, devices, plotter, light penNone of these

70) Match the following codes with their corresponding colors:Set 1 Set 2A. 001 1. YellowB. 101 2. RedC. 110 3. MagentaD. 100 4. Blue

A-4, B-3, C-1, D-2A-2, B-3, C-4, D-1A-2, B-1, C-4, D-3A-3, B-2, C-4, D-2

71) With 6 bit per pixel, _________ bits can be used for each gun. This allows _________ different intensity settings for each of 3 color guns , & total of _________ color value are available for each screen pixel. This means adding bit/pixel ________ the number of choice of color.

2,4,64, increases8,4,255, inversely4,2,32, decease4,2,64, direct

72) In video mixing graphic image is set into a ________ image & mixing is accomplished with ______ that treats designated pixel value in _________ as flag to indicate that video signal should be shown instead of signal from the frame buffer, normally the designated pixel value corresponding to ________ color if frame buffer image.

Video, hardware, frame buffer, backgroundMemory, Software, data buffer, back colorVideo, network, system buffer, groundNone of these

73) In SRGP procedure the output pipeline the application program describes the objective in terms of ________ and ______ stored in or described from application model or __________. It provides___________ to graphic package.

Primitive, attributes, data structure, systemAttribute, entity, relation, systemRelation, entity, attributes dataNone of these

74) Consider the line form (0,0) to (4,6). Find out the slope & in between all the points & length.m=3/2, l=6, x1,y1=1.6,1.5, x2,y2=1.8,2.5m=6, l=4/2, x1,y1=2.7,1.9, x2,y2=1.7,2.6m=3/2, l=7, x1,y1=1.6,1.5, x2,y2=1.9,1.7m=4, l=6, x1,y1=1.6,1.5, x2,y2=1.8,2.5

75) Find out the points between (0,0) to (-6,-6)(-0.5, -0.5),(-1.5,-1.5)(-2.5,-2.5), (-3.5, -3.5)(0.5, 0.5),(1.5,1.5)(2.5,2.5), (3.5, 3.5)(-4.5, -4.5),(-5.5,-5.5)(-6.5,-6.5), (-6.0, -6.0)(-3.4, 2.5),(-1.5,-2.5)(-4.5,-5.5), (-3.5, 4.5)

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1. The smallest addressable screen element is: a.a bit b.a byte c.a pixel d none of the above

2.The ratio of number of horizontal points to that of vertical points is known as a.Aspect Ratio b.Height Ratio c.Bit Ratio d.Vertical Ratio

3.An application of computer vision to create visual effects is

a.Camera focussing b.camera tracking c.camera clicking d.camera capturing

4.The assembly of cathode, control grid, focusing anode and accelerating electrode is called as an a.electron beam b.electric field c.electron gun d.electron assembly

5.Lightpen is a

a.Input device b.output device c.memory device d.A pen

6.The process of returning to the left of the screen after refreshing each line is called as a :

a.vertical retrace b.horizontal retrace c.Interlacing d.interweaving

7.The time it takes the emitted light from the screen to decay its brightness to 1/10th of its initial intensity is called as

a.scan conversion b.Rasterization c.Persistance d.None of the above

8.There is no refresh buffer in

a.CRT b.LCD c.DVST d.None of the above

9.The two phosphor in beam penetration technique are of ________ color

a.red and yellow b.red and green c.green and yellow

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d.none of the above 10.Colored CRTs create an image of

a.single color b.multiple color c.Single color with no intensity information d.No colors

1. The technique for not showing part of the drawing in which one is not interested is called as- (a) Transformation (b) Clipping (c) Morphing (d) None of the above

2. A window defines- (a)‟What‟ is to be viewed (b) „Where is to be viewed (c) „How‟ is to be viewed (d) None of the above

3. A viewing transformation means- (a) WCS –-----NDSC------PDCS (b) WCS-------PDCS (c) NDCS-------PDCS (d) None of the above

4. The window aspect ratio is given by- (a) (WXMAX –WXMIN)*WYMAX (b) Wxmax/WYMAX (C ) (WXMAX-WXMIN)/(WY MAX –WY MIN) (d) None of the above

5. Cohen-Sutherland Algorithm divides our 2D- space into- 136 (a) 8 parts (b) 9 parts (c ) 10 parts (d) 12 parts

6. An outcode is another name for (a) Region code (b) Postal code (c ) Pin code (d) None of the above

7.Cohen-sutherland‟s algorithm is based on-

(a) Divide-and-conquer strategy (b) Recursion (c ) Incremental strategy (d) None of the above

8. Binary search is used in- (a) Cohen-Sutherland algorithm

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(b) Midpoint sub division algorithm (c ) Liang-Barsky algorithm (d) None of the above

10. A positive oriented convex polygon produces- (a) Anticlockwise circuit (b) Clockwise circuit (c ) Electric circuit (d) None of the above

1.The process of conversion of the rasterized picture stored in the frame buffer to the rigid display pattern of video is called as

a.scan conversion b.Raster c.Pixel d.Random

2.The process of burning ON of the pixels for a line segment is called as

a.Rasterization b.Vector generation c.Minimization d.none of the above

3.Most of our drawing algorithms are__________ methods

a. Incremental b.Decremental c.Multplier d.None of the above

4.DDA stands for a. Differential Digital analyzer b. Digital Differential algorithm c. Digital Differential analyzer d. Digital Data analyzer

5.The value of decision parameter while scan converting a circle by midpoint circle algorithm m is a.r-1 b.1-r c.r+1 d.r-1

6.The process of distortion of information due to low frequency sampling or under sampling is called as a.sampling b.Aliasing c.Anti aliasing d.none of the above

7.In our computers we follow- a.Left handed coordinate system b.right handed coordinate system c.Catesian coordinate system d. polar coordinate system

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8.In DDA algorithm when the value of m>1 we sample at a.unit x intervals b. unit y intervals c.twice x interval d.twice y interval

9.In circle generating algorithm we take advantage of circle‟s a.4 -way symmetry b.6-way symmetry c.8-way symmetry d.No symmetry

9.If the value of decision parameter in bresenham line drawing algorithm is greater than zero then

a.x and y are incremented b.x and y are decremented c.x incremented d.y incremented

1. The technique for not showing part of the drawing in which one is not interested is called as- (a) Transformation (b) Clipping (c) Morphing (d) None of the above

2. A window defines-

(a)‟What‟ is to be viewed (b) „Where is to be viewed (c) „How‟ is to be viewed (d) None of the above

3. A viewing transformation means- (a) WCS –-----NDSC------PDCS (b) WCS-------PDCS (c) NDCS-------PDCS (d) None of the above

4. The window aspect ratio is given by- (a) (WXMAX –WXMIN)*WYMAX (b) Wxmax/WYMAX (C ) (WXMAX-WXMIN)/(WY MAX –WY MIN) (d) None of the above

5. Cohen-Sutherland Algorithm divides our 2D- space into-(a) 8 parts (b) 9 parts (c ) 10 parts (d) 12 parts

6. An outcode is another name for (a) Region code (b) Postal code

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(c ) Pin code (d) None of the above

7.Cohen-sutherland‟s algorithm is based on-

(a) Divide-and-conquer strategy (b) Recursion (c ) Incremental strategy (d) None of the above

8. Binary search is used in- (a) Cohen-Sutherland algorithm (b) Midpoint sub division algorithm (c ) Liang-Barsky algorithm (d) None of the above

10. A positive oriented convex polygon produces- (a) Anticlockwise circuit (b) Clockwise circuit (c ) Electric circuit (d) None of the above

Q1.In 3D transformations,our normal convention is to follow: (a)Left Handed System (b)Righr Handed System (c)Any of the above (d)None of the above

Q2.In 3D,the new translation matrix will be (a) 1 0 0 0

0 1 0 0 0 0 1 0 tx ty tz 1

(b) tx 0 0 0 0 ty 0 0 0 0 tz 0 0 0 0 1

(c) tx ty tz 1(d) None of the above

Q3.During scaling,if scale factors are Sx = Sy = Sz = S > 1 then the scaling is called as- (a)Magnification (b)Reduction (c)Rotation (d)None of the above

Q4.Negative rotation angles produces (a)Anticlockwise rotation (b)Counterclockwise rotation (c)clockwise rotation (d)None of the above

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Q5.In pure 3D reflection,the determinant of reflection matrices about any plane is (a)1 (b)0 (c)-1 (d)none of the above

Q6An example of object space method algorithm is

(a)Back Face detection method (b)Painter‟s Algorithm (c)Roberts Algorithm (d)All of the above

Q7.An example of image space method algorithm is (a)Back Face detection method (b)Painter‟s Algorithm (c)Scan line Algorithm (d)All of the above

Q8.A procedure that removes any surfaces or lines which are not to be displayed in a 3D scene is called as a

(a)hidden surface detection (b)hidden surface removal (c)visible surface removal (d)both a and c

Q9.The join points of the curve are also known as (a)Knots (b)Plots (c)Dots (d)Clots

Q10.The degree of Bezier curve segment is determined by the

(a)number of control points to be fited with that curve segment (b)interpolation of control points (c)Geometric Continuity of the curve (d)None of the above

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