Skala Is an Example of Which Type of Clipping

MCQ on Computer Graphics

Posted on: December 24, 2020
Category: LWG | MCQs

MCQ on Computer Graphics

University of Mumbai

DEPARTMENT OF COMPUTER ENGINNERING

COMPUTER GRAPHICS (SEM 3 MCQ)

Which devices provides positional information to the graphics system?
a) Input devices
b) Output devices
c) Pointing devices
d) Both a and c

In graphical system, the array of pixels in the picture are stored in
a) Memory
b) Frame buffer
c) Processor
d) All of the mentioned

The maximum number of points that can be displayed without overlap on a CRT is referred as
a) Picture
b) Resolution
c) Persistence
d) Neither b nor c

The devices which converts the electrical energy into light is called
a) Liquid-crystal displays
b) Non-emitters
c) Plasma panels
d) Emitters

In which system, the Shadow mask methods are commonly used
a) Raster-scan system
b) Random-scan system
c) Only b
d) Both a and b

The process of digitizing a given picture definition into a set of pixel-intensity for storage in the frame buffer is called
a) Rasterization
b) Encoding
c) Scan conversion
d) True color system

Which display devices allows us to walk around an object and view it from different sides.
a) Direct view storage tubes
b) Three-dimensional devices
c) Flat panel display devices
d) Plasma panel display devices

Random-scan system mainly designed for
a) Realistic shaded screen
b) Fog effect
c) Line-drawing applications
d) Only b

The primary output device in a graphics system is_________
a) Scanner
b) Video monitor
c) Neither a nor b
d) Printer

. On a black and white system with one bit per pixel, the frame buffer is commonly called as
a) Pix map
b) Multi map
c) Bitmap
d) All of the mentioned

MCQ on Computer Graphics

. Aspect ratio means
a) Number of pixels
b) Ratio of vertical points to horizontal points
c) Ratio of horizontal points to vertical points
d) Both b and c

A translation is applied to an object by
a) Repositioning it along with straight line path
b) Repositioning it along with circular path
c) Only b
d) All of the mentioned

The translation distances (dx, dy) is called as
a) Translation vector
b) Shift vector
c) Both a and b
d) Neither a nor b

In 2D-translation, a point (x, y) can move to the new position (x', y') by using the equation
a) x'=x+dx and y'=y+dx
b) x'=x+dx and y'=y+dy
c) X'=x+dy and Y'=y+dx
d) X'=x-dx and y'=y-dy

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

_________ is a rigid body transformation that moves objects without deformation.
a) Rotation
b) Scaling
c) Translation
d) All of the mentioned

A straight line segment is translated by applying the transformation equation
a) P'=P+T
b) Dx and Dy
c) P'=P+P
d) Only c

Polygons are translated by adding __________ to the coordinate position of each vertex and the current attribute setting.
a) Straight line path
b) Translation vector
c) Differences
d) Only b

To change the position of a circle or ellipse we translate
a) Center coordinates
b) Center coordinates and redraw the figure in new location
c) Outline coordinates
d) All of the mentioned

The basic geometric transformations are
a) Translation
b) Rotation
c) Scaling
d) All of the mentioned

MCQ on Computer Graphics

. A two dimensional rotation is applied to an object by
a) Repositioning it along with straight line path
b) Repositioning it along with circular path
c) Only b
d) Any of the mentioned

To generate a rotation , we must specify
a) Rotation angle ϴ
b) Distances dx and dy
c) Rotation distance
d) All of the mentioned

Positive values for the rotation angle ϴ defines
a) Counterclockwise rotations about the end points
b) Counterclockwise translation about the pivot point
c) Counterclockwise rotations about the pivot point
d) Negative direction

The rotation axis that is perpendicular to the xy plane and passes through the pivot point is known as
a) Rotation
b) Translation
c) Scaling
d) Shearing

The original coordinates of the point in polor coordinates are
a) X'=r cos (Ф +ϴ) and Y'=r cos (Ф +ϴ)
b) X'=r cos (Ф +ϴ) and Y'=r sin (Ф +ϴ)
c) X'=r cos (Ф -ϴ) and Y'=r cos (Ф -ϴ)
d) X'=r cos (Ф +ϴ) and Y'=r sin (Ф -ϴ)

The two-dimensional rotation equation in the matrix form is
a) P'=P+T
b) P'=R*P
c) P'=P*P
d) P'=R+P

________ is the rigid body transformation that moves object without deformation.
a) Translation
b) Scaling
c) Rotation
d) Shearing

An ellipse can also be rotated about its center coordinates by rotating
a) End points
b) Major and minor axes
c) Only a
d) None

The transformation that is used to alter the size of an object is
a) Scaling
b) Rotation
c) Translation
d) Reflection

The two-dimensional scaling equation in the matrix form is
a) P'=P+T
b) P'=S*P
c) P'=P*R
d) P'=R+S

MCQ on Computer Graphics

. Scaling of a polygon is done by computing
a) The product of (x, y) of each vertex
b) (x, y) of end points
c) Center coordinates
d) Only a

If the scaling factors values sx and sy < 1 then
a) It reduces the size of object
b) It increases the size of object
c) It stunts the shape of an object
d) None

If the scaling factors values sx and sy are assigned to the same value then
a) Uniform rotation is produced
b) Uniform scaling is produced
c) Scaling cannot be done
d) Scaling can be done or cannot be done

If the scaling factors values sx and sy are assigned to unequal values then
a) Uniform rotation is produced
b) Uniform scaling is produced
c) Differential scaling is produced
d) Scaling cannot be done

We control the location of a scaled object by choosing the position is known as
a) Pivot point
b) Fixed point
c) Differential scaling
d) Uniform scaling

The polygons are scaled by applying the following transformation.
a) X'=x * Sx + Xf(1-Sx) and Y'=y * Sy + Yf(1-Sy)
b) X'=x * Sx + Xf(1+Sx) and Y'=y * Sy + Yf(1+Sy)
c) X'=x * Sx + Xf(1-Sx) and Y'=y * Sy – Yf(1-Sy)
d) X'=x * Sx * Xf(1-Sx) and Y'=y * Sy * Yf(1-Sy)

Two successive translations are___________________
a) Multiplicative
b) Inverse
c) Subtractive
d) Additive

. Which transformation distorts the shape of an object such that the transformed shape appears as if the object were composed of internal layers that had been caused to slide over each other?
a) Rotation
b) Scaling up
c) Scaling down
d) Shearing

Transpose of a column matrix is________________
a) Zero matrix
b) Identity matrix
c) Row matrix
d) Diagonal matrix

In a rotation, by how much angle is the object rotated?
a) 45 degree
b) 90 degree
c) 180 degree
d) 360 degree

MCQ on Computer Graphics

If two pure reflections about a line passing through the origin are applied successively the result is ___________________
a) Pure rotation
b) Quarter rotation
c) Half rotation
d) True reflection

Which of the following is NOT true?
Image formed by reflection through a plane mirror is_______________
a) of same size
b) same orientation
c) virtual
d) is at same distance from the mirror

Shearing is also termed as ________________
a) Selecting
b) Sorting
c) Scaling
d) Skewing

Which of this is compulsory for 2D reflection.
a) Reflection plane.
b) Origin
c) Reflection axis
d) Co-ordinate axis.

What is the primary use of clipping in computer graphics?
a) adding graphics
b) removing objects and lines
c) zooming
d) copying

Which vertex of the polygon is clipped first in polygon clipping?
a) top right
b) bottom right
c) bottom left
d) top left

A bitmap is collection of ___________________ that describes an image.
a) bits
b) colors
c) algorithms
d) pixels

. In line clipping, the portion of line which is _____________ of window is cut and the portion that is _____________ the window is kept.
a) outside, inside
b) inside, outside
c) exact copy, different
d) different, an exact copy

'Skala' is an example of which type of clipping?
a) curve clipping
b) point clipping
c) polygon clipping
d) line clipping

The process of removal of hidden surfaces is termed as _______________
a) clipping
b) copying
c) culling
d) shorting

MCQ on Computer Graphics

Cohen-Sutherland clipping is an example of _________________
a) polygon clipping
b) text clipping
c) line clipping
d) curve clipping

The Cohen-Sutherland algorithm divides the region into _____ number of spaces.
a) 8
b) 6
c) 7
d) 9

What is the name of the small integer which holds a bit for the result of every plane test?
a) setcode
b) outcode
c) incode
d) bitcode

If both codes are 0000, (bitwise OR of the codes yields 0000) line lies __________________ the window.
a) completely outside
b) half inside half outside
c) completely inside
d) can't say anything

The 4-bit code of top-left region of the window is ____________
a) 1001
b) 1100
c) 0101
d) 1010

. The 4-bit code of bottom-right region of the window is ____________
a) 1001
b) 0101
c) 1010
d) 0110

The logical ______ of the endpoint codes determines if the line is completely inside the window.
a) AND
b) OR
c) NOT
d) NOR

Liang–Barsky algorithm is a __________ clipping algorithm.
a) circle
b) text
c) line
d) pixel

The ideas of the Liang-Barsky algorithm are the same with which algorithm?
a) Cyrus Beck algorithm
b) Liam-Chopsky algorithm
c) Cohen Sutherland algorithm
d) All have the same

This algorithm uses the ____________ equations for a line and solves four inequalities.
a) linear
b) quadratic
c) cubic
d) parametric

MCQ on Computer Graphics

Which type of arithmetic is used in Liang Barsky algorithm?
a) simple arithmetic operations
b) floating point arithmetic
c) fixed point arithmetic
d) logarithmic operations

. Sutherland-Hodgeman clipping is an example of_________________ algorithm.
a) line clipping
b) polygon clipping
c) text clipping
d) curve clipping

Only vertices from the subject polygon that are on the _______________ are selected.
a) lower half
b) boundary
c) opaque side
d) visible side

. One of the drawbacks of Sutherland- Hodgeman algorithm is that it can't produce ____________ areas.
a) connected
b) multiple
c) discrete
d) circular

The degree of the B-spline with varying knot vectors:
a) Increases with knot vectors
b) Decreases with knot vectors
c) Remains constant
d) none of the mentioned

Convex hull property is satisfied by the following surface:
a) Bezier
b) B-spline
c) NURBS
d) All of the mentioned

The degree of the Bezier curve with n control points is:
a) n + 1
b) n – I
c) n
d) 2n

____________is basically a form of pictorial presentation.
a) Photography
b) Animations
c) Drawing
d) Creativity

It refers to simulated motion pictures showing movement of drawn objects.
a) Motion
b) Animation
c) VR
d) SMD

A device produces an illusion of movement from a rapid succession of static pictures.
a) Zoetrope
b) Thaumatrope
c) Phenakistoscope
d) HMD

MCQ on Computer Graphics

___________ animation is used to animate things that are smaller than life size.
a) Immersive
b) Claymotion
c) Stop motion
d) Augmented

The degree of the B-spline with varying knot vectors:
a) Increases with knot vectors
b) Decreases with knot vectors
c) Remains constant
d) none of the mentioned

Convex hull property is satisfied by the following surface:
a) Bezier
b) B-spline
c) NURBS
d) All of the mentioned

The degree of the Bezier curve with n control points is:
a) n + 1
b) n – I
c) n
d) 2n

____________is basically a form of pictorial presentation.
a) Photography
b) Animations
c) Drawing
d) Creativity

It refers to simulated motion pictures showing movement of drawn objects.
a) Motion
b) Animation
c) VR
d) SMD

A device produces an illusion of movement from a rapid succession of static pictures.
a) Zoetrope
b) Thaumatrope
c) Phenakistoscope
d) HMD

___________ animation is used to animate things that are smaller than life size.
a) Immersive
b) Claymotion
c) Stop motion
d) Augmented

________ Representation gives the final classification to use computer graphics.
A) Graphical
B) Coordinates
C) Pictorial
D) Characters
______ is done to achieve better image quality either by elevating image contrast levels or by eradicating noise.
A) Image compression
B) Image enhancement
C) Image restoration
D) Image segmentation

MCQ on Computer Graphics

In controllable interaction user can change the attributes of the ____________.
A) Images
B) Widgets
C) Videos
D) Audios
Programmer's Hierarchical Interactive Graphics System (PHIGS) supports _______ grouping of 3D primitives called structures.
A) Nested-hierarchical
B) Single-hierarchical
C) Multilevel-hierarchical
D) Single-level- hierarchical
_________ is responsible for producing the picture from the detailed descriptions.
A) Graphical System
B) Application model
C) Conceptual model
D) Application program
________ is the separate memory area provided in graphics workstations.
A) System memory
B) Display processor memory
C) Base memory
D) Conventional memory
The raster-scan generator produces _________ that generate the raster scan.
A) Pixel values
B) Deflection beams
C) Deflection signals
D) None of the above
To create scenes, images, pictures and also animated pictures ________ acts as a very powerful tool.
A) Graphics package
B) Graphics controller
C) Graphics software
D) Graphics card
A ______ is used by the video controller to store many entries of pixel values in RGB format.
A) Dynamic table
B) Lookup table
C) Static Table
D) All the above

_______ can be used in the absence of colour capability of a monitor to set the shades of grey or grayscale for displayed primitives.
A) Color functions
B) Graphics controller
C) Video controller
D) Display processor

MCQ on Computer Graphics

The number of colour choices can be increased by decreasing the number of ______ to the frame colour.
A) Grayscale
B) Bits per pixel
C) Intensity level
D) Brightness
The ________ controls the x and y address registers which in turn define the memory location to be accessed next.
A) Frame buffer
B) Raster scan generator
C) Video controller
D) Random Scan Display Processor
_________ Method proves to be efficient in the scan-conversion of straight lines.
A) Raster Algorithm
B) DDA Algorithm
C) Bresenham's line algorithm
D) Frame Algorithm
_______ is implemented using rotating random-access semiconductor memory.
A) Peripheral Buffer
B) Memory Buffer
C) Frame Buffer
D) IO Buffer
_________ Algorithm is orientation dependent.
A) DDA
B) Rasterization
C) Scan conversion
D) Bresenham's Line Algorithm
_______ equation can be used to find y coordinate for the known x coordinate.
A) Differential
B) Polynomial
C) Simultaneously
D) Binomial
The intensity values for all the screen points are held in the _____________.
A) Frame buffer
B) IO buffer
C) Video controller
D) Display processor
________ does its own scan conversion and handles all Simple Raster Graphics Package's (SRGP) primitives and attributes directly.
A) Video controller
B) Display controller
C) Frame buffer
D) I/O controller
________ algorithm can be used to draw the circle by defining a circle as a differential equation.
A) Bresenham's line
B) Digital differential analyzer
C) Recursive algorithms
D) Backtracking algorithms
Based on the line segment joining any two point's lies, the polygons can be classified as__________.
A) Convex and Concave
B) Regular and Irregular
C) Equilateral and Equiangular
D) None of the above
For scan line with every polygon side, the use of ___________ simplifies the calculation of intersection points.
A) Primitive's spatical coherence
B) Coherence properties
C) Span coherence properties
D) Scan-line coherence properties

MCQ on Computer Graphics

The __________ is the smallest rectangle that contains the polygon.
A) Cache box
B) Activex box
C) Bounding box
D) Data box
Algorithms that fill interior, that defines regions are called ___________.
A) Boundary Fill algorithm
B) Flood Fill algorithm
C) Scan line algorithm
D) Fill area algorithm
Which of the following algorithm aims to overcome difficulties of seed fill algorithm?
A) Scan line algorithm
B) Boundary fill algorithm
C) Flood fill algorithm
D) Line algorithm
In scan Line algorithm, as we scan from top to bottom, if the y coordinates between the two scan line changes by 1 then the equation is represented as ___________.
A) Yi+1=Yi -1
B) Yi+1=Yi +1
C) Yi-1=Yi -1
D) Yi+1=Yi /1
Convex and Concave types of Polygon are classified on the basis of:
A) Where line segment joining any two points lies entirely within a polygon
B) Where the line segment joining any two points may not lie completely within the polygon.
C) Both a & b
D) Where the line segment joining any two points lies
The region against which an object is to be clipped is called ________________.
A) Clip Window
B) Crop Window
C) Cross Section
D) Connecting Window
______ is the procedure used to identify if any portions of a picture are within or outside of a specific region of space.
A) Clipping
B) Copying
C) Conversion
D) Communication
_________ Method uses small line segments to generate a character.
A) Stroke
B) Signal
C) Crisscross
D) OCR
If the endpoints of the line are P5 P6 and the corresponding code is 0001 and 0000, the logical AND code is 0000, then the result is __________.
A) Partially Visible
B) Completely Visible
C) Completely Invisible
D) Error
The process of selecting and viewing the picture with a different view is called ______.
A) Windowing
B) Cropping
C) Clipping
D) Filling
A method used to test lines for total clipping is equivalent to the ____________ .
A) Logical AND operator
B) Logical OR operator
C) Logical XOR operator
D) Logical NAND operator

MCQ on Computer Graphics

_____________ can be clipped by processing its boundary as a whole against each window edge.
A) Rectangle
B) Polygon
C) Octagon
D) Pentagon
The process of changing the position of an object from one coordinate location to another in a straight line path is called _________
A) Translation
B) Transformation
C) Transaction
D) Translocation
For the axis which does not coincide with the axis of the coordinate, a rotation matrix can be set up as a composite transformation that involves the combinations of translation and the ________ rotations.
A) Cartesian axes
B) Spatial axes
C) Coordinate axes
D) Reflexive axes

_________ is the process of mapping of coordinates in the display of an image.
A) Viewing transformation
B) Reviewing transformation
C) Scaling transformation
D) Data transformation
The inverse of a matrix is another matrix such that when the two are multiplied together to get the__________.
A) Transpose the matrix
B) Identity matrix
C) Diagonal matrix
D) Square matrix
____ allow the programmer to define picture that include a variety of transformations.
A) Human-computer information retrieval
B) Graphics systems
C) Software testing
D) Networking
The homogeneous coordinate is represented by a ________.
A) Triplet
B) Quadruplet
C) Tetractic
D) None of the above
We can obtain a _________ if and only if the determinant of the matrix is nonzero.
A) Row Matrix
B) Inverse matrix
C) Column Matrix
D) Rectangular Matrix

MCQ on Computer Graphics

A ______ is nothing but the film plane in a camera which is positioned and oriented for a particular shot of the scene.
A) View system
B) View volume
C) View plane
D) All the above
A _________ can be defined by establishing the viewing coordinate system or view reference coordinate system.
A) View system
B) View plane
C) View volume
D) All the above
The length of the directed line segment between the view plane and the view reference points is referred to as_________.
A) View reference point
B) View-distance
C) view-up vector
D) None of the above

The mismatch between 3D objects and 2D displays is compensated by introducing _________.
A) Coordinates
B) View plane
C) Projections
D) None of the above
The process of displaying more than one face of an object using the orthographic projection is known as ___________ orthographic projection.
A) Isometric
B) Cavalier
C) Cabinet
D) Axonometric
In ___ the view planes of the projection planes not normal to a principal axis are used.
A) Oblique Projection
B) Cavalier projection
C) Axonometric orthographic
D) Cabinet projection
If the direction of the projection is normal then it is called as __________.
A) Orthographic parallel projection
B) Oblique parallel projection
C) Perspective Projection
D) Ortho-Oblique Projection
Computer graphics is an extremely effective medium for communication between __________ and ___________.
A) Human beings, Computers
B) Display, Computer
C) Input, Output
D) Virtual reality, Real World
Recognition and construction of 3D models of a scene from many 2D images is done in_________ and __________.
A) Scene detection, Auditory scene analysis
B) Visual scene analysis, Computer vision
C) Speech analysis, Computer vision
D) Scene analysis, Computer vision
______ is the process of digitizing a picture definition given in an application program and stores it in the frame buffer as a set of ____________.
A) Scan code, Pixel-intensity images
B) Scan conversion, Pixel-intensity values
C) Scan code, Pixel-intensity values
D) Scan conversion, Pixel-intensity images

MCQ on Computer Graphics

It is the process of digitizing a picture definition given in an application program and store it in the frame buffer as a set of pixel-intensity values. This above statement refers to:
A) Scan conversion
B) Video controller
C) Raster-scan system
D) Look up table (LUT)

The _______ between the output of the shift register and the _______ rate is maintained.
A) Synchronization, Audio Scan
B) Synchronization, Image Scan
C) Synchronization, Video Scan
D) All of the above
______ is a small group of __________ with a fixed color combination used to fill the particular area in the picture
A) Pattern & Pixels
B) Picture & Pixels
C) Tiling pattern & Pictures
D) Tiling pattern & Pixels
If the result is not _________ in the logical AND operation with two endpoint codes, then the line is completely ________ the clipping region.
A) 0001, Outside
B) 0000, Outside
C) 0010, Inside
D) 0100, Inside
The viewing transformation is the combination of _____ transformation and______ transformations.
A) Normalization, Workstation
B) Phase normalization, Frequency normalization
C) Frequency normalization, Workstation
D) Phase normalization, Workstation
______ is used to convert 3D description of objects in viewing coordinates to the _______.
A) Modeling transformation, 2D world coordinates
B) Projection transformation, 2D projection coordinates
C) Viewing transformation, 2D view coordinates
D) Workstation transformation, 2D device coordinates

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