B.Midpoint algorithm · A.Clipping against the window and then applying the window transformation...

MCQ’s for Computer Graphics and Gaming (Unit-3 and Unit-4)

1) In displaying a clipped picture the efficient method is? A. Clipping against the window and then applying the window transformationB. Applying window transformation and then clipping against the viewportC. Both A and B have the same efficiencyD. Efficiency depends on whether the window is an aligned rectangle or not

Answer = DMarks 1Unit 32) Reflection of a point about x-axis, followed by a counter-clockwise rotation of 900, is equivalent to reflection about the line?

A. x = -yB. y = - xC. x = yD. x + y = 1

Answer = CMarks 1Unit 43) The point at which a set of projected parallel lines appear to coverage is called as a?

A. convergence pointB. vanishing pointC. point of illusionD. point of delusion

Answer = B Marks 1Unit 44) A transformation can be simulated by the transformations?

A. transformation, rotation and stretchingB. translation and rotationC. rotation, scaling and inversionD. Translation, rotation, scaling, shearing and inversion.

Answer = DMarks 1Unit 45) Engineering drawing commonly applies?

A. oblique projectionB. orthographic projectionC. perspective projectionD. None of above

Answer = B Marks 1Unit 4Explanation: An engineering drawing, a type of technical drawing, is used to fully and clearly define requirements for engineered items. Orthographic projection is used for such drawings.

6) In a clipping algorithm of Cohen Sutherland using region codes, a line is already clipped if the? A. codes of the end point are sameB. logical AND of the end point code is not 0000C. logical AND of the end point code is 0000

D. A and BAnswer = D Marks 2Unit 37) The subcategories of orthographic projection are?

A. cavalier, cabinet, isometricB. cavalier, cabinetC. isometric, dimetric, trimetricD. isometric, cavalier, trimetric

Answer = C Marks 1Unit 48) Which of the following clipping algorithm follows the Divide and Conquer strategy?

A. 4-bit algorithm B. Midpoint algorithmC. Cyrus break algorithmD. Cohen- Sutherland algorithm

Answer = B Marks 1Unit 39) A line with endpoints codes as 0000 and 0100 is?

A. Partially invisibleB. Completely visibleC. Completely invisibleD. Trivially invisible

Answer = A Marks 1Unit 310) Obliquee projection with an angle of 450 to the horizontal plane is called as?

A. Cabinet projectionB. Isometric projectionC. Cavalier projectionD. None of these

Answer = C Marks 1Unit 4Explanation: Oblique projection is a simple type of graphical projection used for producing pictorial, two-dimensional images of three-dimensional objects

11) Find the incorrect statement

A. A perspective projection produces realistic views

B. A perspective projection preserves realistic dimensionsC. A parallel projection gives realistic representation of 3-D objectsD. Both B and C above

Answer: DMarks 1Unit 4

12) The perspective anomaly in which the object behind the center of projection is projected upside down and backward onto the view plane is called? A. Perspective foreshortening B. Vanishing view C. View Confusion D. Topological distortion

Answer: CMarks 1Unit 4

13) There are 2 types of polygons. They are?A. convex and concave B. squire and rectangle C. hexagon and squire D. octagon and convex

Answer: AMarks 1Unit 3

14) A polygon in which the line segment joining any 2 points within the polygon lies completely inside the polygon is called__?

A. convex polygon B. concave polygon C. both a and b D. convert ploygon


15) A polygon in which the line segment joining any 2 points within the polygon may not lie completely inside the polygon is called __?

A. convex polygon B. concave polygon C. both a and b D. convert polygon

Answer: BMarks 1Unit 3

16) Rectangular patterns are sometimes referred as__?A. Tiling pa�erns B. Filling pa�erns C. coloring pa�erns

D. both a and b Answer: AMarks 1Unit 3

17) Replicating pixels is one of the methods of__?A. Thick primi�vesB. Thin Primi�ves C. Stylish Primi�vesD. Both A and B


18) The process of selecting and viewing the picture with different views is called__?A. WindowingB. ClippingC. Projec�ngD. Both A and B


19) The process which divides each element of the picture into its visible and invisible portions, allowing the invisible portion to be discarded is called__?

A. WindowingB. ClippingC. Projec�ngD. Both A and B


20) The region against which an object is to be clipped is called__?A. Clip window or clipping windowB. Drawing windowC. Image windowD. Both B and C


21) The region code 0000 represents the__?A. Viewing windowB. Le� clipping windowC. Right clipping window

D. Bottom clipping windowAnswer: AMarks 1Unit 3

22) A method used to test lines for total clipping is equivalent to the__?A. Logical XOR operatorB. Logical OR operatorC. Logical AND operatorD. Both A and B


23) A process of changing the position of an object in a straight line path from one coordinates location to another is called__?

A. Transla�onB. Rota�onC. Mo�onD. Both B and C


24) A two dimensional rotation is applied to an object by repositioning it along a?A. Circular path in the x-y planeB. Straight path in the x-y planeC. Diagonals path in the x-y planeD. Upward in the x-y plane


25) A scaling transformation changes the ____of an object?A. sizeB. locationC. ShapeD. Both A and B


26) Given matrix 1000000yxSSS represents the?A. Homogeneous Coordinates for rota�on B. Homogeneous Coordinates for transla�on C. Homogeneous Coordinates for Scaling

D. Homogeneous Coordinates for both rota�on and scaling Answer: CMarks 1Unit 4

27) In two dimensional viewing we have?A. 3D window and 2D viewport B. 3D window and 3D viewportC. 2D window and 2D viewport

D. both A and BAnswer: AMarks 1Unit 4

28) The first viewing parameter we must consider is the?A. Viewing window B. Shi� vectorC. View reference point

D. View reference planeAnswer: CMarks 1Unit 4

29) The line segment from the view plane to the view reference point is called?A. View distance B. Projec�on distanceC. View path

D. both A and B Answer: AMarks 1Unit 4

30) In perspective projection, the lines of projection are not parallel. Instead, they all coverage at a single point called?

A. Center pointB. Projec�on reference pointC. Center of projec�on or projec�on reference point

D. interac�on point Answer: CMarks 1Unit 4

31) When the projection is obtained by projecting points along parallel lines that are not perpendicular to the projection plane is called?

A. isometric projec�on B. perspec�ve projec�on

C. oblique projec�on D. cavalier projec�on Answer: CMarks 1Unit 4

32) The transformation that produces a mirror image of an object relative to an axis is called?A. rota�onB. transla�on C. reflec�on

D. both A and BAnswer: CMarks 1Unit 4

33) A transformation that slants the shape of objects is called the?A. Shear transforma�onB. transla�on C. reflec�on


34) Sometimes it may require undoing the applied transformation, in such a case which of the following transformation will be used?

A. Shear transforma�onB. transla�on C. reflec�on

D. inverse transforma�onAnswer: DMarks 1Unit 4

35) After completion of scanning of one line, the electron beam files back to the start of next line, this process is known as?

A. Horizontal retraceB. Ver�cal retraceC. interleaving


36) 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

A. Scan-line fill algorithmB. Boundary-fill algorithm

C. Flood-fill algorithmD. Parallel curve algorithm

Answer: BMarks 2Unit 3Explanation: This algorithm proceeds outward pixel by pixel until the boundary color is encountered.

37) If we want to recolor an area that is not defined within a single color boundary is known asA. Boundary-fill algorithmB. Parallel curve algorithmC. Flood-fill algorithmD. Only b

Answer: CMarks 2Unit 3Explanation: We can paint such areas by replacing a specified interior color.

38) A three dimensional graphics has A. Two axesB. Three axesC. Both a & bD. None of these


39) _________as the most commonly used boundary presentation for a 3-D graphics objectA. Data polygonB. Surface polygonC. System polygonD. None of theseAnswer: BMarks 1Unit 3

40) A three dimensional object can also be represented using_______A. MethodB. EquationC. PointD. None of these


41) the most basic transformation that are applied in three-dimensional planes areA. TranslationB. ScalingC. RotationD. All of these


42) The transformation in which an object can be shifted to any coordinate position in three dimensional plane are called

A. TranslationB. ScalingC. RotationD. All of these


43) The transformation in which an object can be rotated about origin as well as any arbitrary pivot point are called



44) The transformation in which the size of an object can be modified in x-direction, y-direction and z- direction



45) Apart from the basic transformation, ________are also usedA. ShearingB. ReflectionC. Both a & bD. None of these.


46) In which transformation, the shape of an object can be modified in any of direction depending upon the value assigned to them

A. ReflectionB. ShearingC. ScalingD. None of these

Answer: BMarks 1Unit 447) In which transformation, the mirror image of an object can be seen with respect to x-axis, y-axis, z-axis

as well as with respect to an arbitrary lineA. ReflectionB. ShearingC. Translation

D. None of theseAnswer: AMarks 1Unit 4

48) How many types of projections are available?A. 1B. 2C. 3D. 4


49) The types of projection areA. Parallel projection and perspective projectionB. Perpendicular and perspective projectionC. Parallel projection and Perpendicular projectionD. None of these


50) How many types of parallel projection are available?A. 1B. 2C. 3D. 4


51) The types of parallel projection areA. Orthographic projection and quadric projectionB. Orthographic projection and oblique projectionC. oblique projection and quadric projectionD. None of these


52) The projection in which the projection plane is allowed to intersect the x, y and z-axes at equal distances

A. Wire frame modelB. Constructive solid geometry methodsC. Isometric projectionD. Back face removal


53) In which projection, the plane normal to the projection has equal angles with these three axesA. Wire frame modelB. Constructive solid geometry methodsC. Isometric projectionD. Back face removal


54) By which, we can take a view of an object from different directions and different distances A. ProjectionB. RotationC. TranslationD. Scaling


55) Parallel projection shows theA. True image of an objectB. True size of an objectC. True shape of an objectD. all of these


56) Projection rays (projectors) emanate from a A) COP(centre of projection )B) Intersect projection planeC) Both a & bD) None of these


57) The centre of projection for parallel projectors is atA) ZeroB) InfinityC) OneD) None of these


58) In orthographic projection, engineering useA) Top view of an objectB) Front view of an objectC) Side view of an objectD) All of these


59) The orthographic projection that show more than one side of an object are calledA) Axonometric projectionB) Isometric projectionC) Both a & b

D) None of theseAnswer: CMarks 2Unit 4

60) The projection that can be viewed as the projection that has a centre of projection at a finite distance from the plane of projection are called

A) Parallel projectionB) Perspective projectionC) Isometric projectionD) None of these


61) The perspective projection is more practical because the distant objects appear A) SmallerB) LargerC) Neither smaller nor largerD) None of these


62) The equation of scaling in 3D transformation will beA) x1=x+Tx,y1=y+Ty,z1=z+TzB) x1=x.sx, y1=y.sy, z1=z.szC) Both of theseD) None of these


63) The equation of translation in 3D transformation will beA) X1=x+Tx,y1=y+Ty,z1=z+TzB) X1=x.sx,y1=y.sy,z1=z.szC) Both of theseD) None of these


64) The equation for describing surface of 3D plane isA) Ax+ By+ Cz+ D= 0B) Ax+ By+ Cz = 0C) Ax+ By+ D= 0D) Ax+ By+ Cz+ D= 1


65) The object refers to the 3D representation through linear, circular or some other representation are calledA) Quadric surfaceB) Sweep representationC) TorusD) None of these

Answer: B

Marks 1Unit 4

66) The distance of a line from the projection plane determines A) Its size on projection planeB) Its length on projection planeC) Its width on projection planeD) Its height on projection plane


67) If line is far away from the projection plane, _______ is its image on the projection planeA) Smaller B) LargerC) Neither smaller nor largerD) None of these


68) The sweep representation of an object refers to theA) 2D representationB) 3D representationC) Both a & bD) None of these


69) The area of computer that is captured by an application is calledA. WindowB. View portC. DisplayD. None of these


70) The scan line coherence algorithm was developed byA. WylieB. EvansC. Cat mullD. Both a & b


71) The array are used with scan line coherence algorithm areA. For intensity valueB. For depth valueC. Both a & bD. None of these

Answer: CMarks 1

Unit 3

72) Scan lines are used to scan fromA. Top to bottomB. Bottom to topC. Both a & bD. None of these


73) A fast and simple method for rendering an object with polygon surface isA. Constant-intensity shadingB. Flat shadingC. Both a & bD. None of these


74) The selection and separation of a part of text or image for further operation are calledA. TranslationB. ShearC. ReflectionD. Clipping


75) The complex graphics operations areA. SelectionB. SeparationC. ClippingD. None of these


76) Which attributes of image transformation change the size of an image corresponding to the x-axis and y-axisA. SCALE-XB. SCALE-YC. Both a & bD. None of these


77) Which attributes of image transformation change the position of image corresponding to the x- axis and y-axis

A. TRANSLATE-XB. TRANSLATE-YC. Both a & bD. None of these

Answer: C

Marks 1Unit 4

78) Which attributes of image transformation rotate the image by a given angle

A. ROTATE-XB. ROTATE-YC. Both a & bD. None of these


79) A many sided figure is termed asA. SquareB. PolygonC. RectangleD. None


80) The end point of polygon are called asA. EdgesB. VerticesC. LineD. None of these


81) The line segment of polygon are called asA. EdgesB. VerticesC. LineD. None of these


82) If the visit to the vertices of the polygon in the given order produces an anticlockwise loop are called

A. Negatively orientedB. Positively orientedC. Both a & bD. None of these

Answer: B

Marks 1Unit 3

83) If the visit to the vertices of the polygon in the given order produces an clockwise loop are called

A. Negatively orientedB. Positively orientedC. Both a & bD. None of these


84) Which things are mainly needed to make a polygon to enter the polygon into display fileA. No of sides of polygonB. Vertices pointsC. Both a & bD. None of these


85) Two types of coordinates areA. Positive and negative coordinatesB. Absolute and relative coordinatesC. Both a & bD. None


86) Which approaches are used for determine whether a particular point is inside or outside of a polygon

A. Even-odd methodB. Winding number methodC. Both a & bD. None of these


87) The process of mapping a world window in world coordinate system to viewport are calledA. Transformation viewingB. View PortC. Clipping windowD. Screen coordinate system


88) The rectangle portion of the interface window that defines where the image will actually appear are called

A. Transformation viewingB. View portC. Clipping windowD. Screen coordinate system


89) The space in which the image is displayed are calledA. Screen coordinate systemB. Clipping windowC. World coordinate systemD. None of these


90) The rectangle space in which the world definition of region is displayed are calledA. Screen coordinate systemB. Clipping window or world windowC. World coordinate systemD. None of these


91) The object space in which the application model is defined is calledA. Screen coordinate systemB. Clipping window or world windowC. World coordinate systemD. None of these


92) Some common form of clipping includeA. curve clippingB. point clippingC. polygon clippingD. All of these


93) The alteration of the original shape of an object, image, sound, waveform or other form of information are called

A. ReflectionB. DistortionC. RotationD. None of these


94) The algorithm used for filling the interior of a polygon is calledA. Flood fill algorithmB. Boundary fill algorithmC. Scan line polygon fill algorithmD. None of these


95) The function of scan line polygon fill algorithm isA. Find intersection point of the boundary of polygon and scan lineB. Find intersection point of the boundary of polygon and pointC. Both a & bD. None of these


96) If the pixel is already filled with desired color then leaves it otherwise fills it. This is calledA. Flood fill algorithmB. Boundary fill algorithmC. Scan line polygon filling algorithmD. None of these


B.Midpoint algorithm · A.Clipping against the window and then applying the window transformation...

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