Computer Graphics MCQ - Set 3

Friday 27 July 2012


Following are the Multiple Choice Questions On Computer Graphics based on the UGC-NET, TET Exams and other competitive exams.
 
1)  When several types of output devices are available in graphics installation, it is convenient to use ?
  1. bundled attributes
  2. unbundles attributes
  3. inquiry attributes
  4. all of above
Show/Hide Answer
Answer = A 
Explanation:  Individual attribute commands provide a simple and direct method for specifying
attributes when a single output device is used. When several kinds of output device are
available at a graphics installation, it is convenient to set up a table for each output device
that lists set of attribute values that are to be used on that device to display each primitive
type. Attribute specified in this manner is known as bundled attribute.

2) x = at2 ; y = 2at is the parametric equation of ?
  1. Circle
  2. Rectangular hyperbola
  3. Parabola
  4. Ellipse
Show/Hide Answer
Answer = C 
Explanation: parametric equation is a method of defining a relation using parameters.

3) In displaying a clipped picture the efficient method is ?
  1. Clipping against the window and then applying the window transformation
  2. Applying window transformation and then clipping against the viewport
  3. Both A and B have the same efficiency
  4. Efficiency depends on whether the window is an aligned rectangle or not
Show/Hide Answer
Answer = D
Explanation: N/A

4) The anti - aliasing technique which allows shift of 1/4,1/2 and 3/4 of a pixel diameter enabling a closer path of a line is ?
  1. Pixel phasing
  2. Filtering
  3. Intensity compensation
  4. Sampling technique
Show/Hide Answer
Answer = A 
Explanation: Pixel phasing is an anti-aliasing technique, stair steps are smoothed out by moving
the electron beam to more nearly approximate positions specified by the object geometry.

5) All the hidden surface algorithms employe image space approach except ?
  1. Back face removal
  2. Depth buffer method
  3. Scan line method
  4. Depth sort method
Show/Hide Answer
Answer = A 
Explanation: A simple object space algorithm is Back-Face removal (or back face cull) where no faces on the back of the object are displayed. It can only be used on solid objects modeled as a polygon mesh.
6) The major components of CRT are ?
  1. Electronic Gun
  2. Phosphorous coated screen
  3. Control electrodes
  4. Deflection yoke
  5. All of above
Show/Hide Answer
Answer = E 
Explanation: N/A
7)  ........ used to regulate the flow of elections in CRT ?
  1. Electronic Gun
  2. Focusing electrode
  3. Control electrode
  4. All of the above
Show/Hide Answer
Answer = C 
Explanation: The electrode in an electron tube whose voltage with respect to the voltage of the cathode determines the electron flow to the anode.

8) The glow given off by the, phosphor during exposure of the electron beam is known as ?
  1. Fluorescence
  2. Phosphorescence
  3. Persistence
  4. All of the above
Show/Hide Answer
Answer = A 
Explanation: Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence

9)  Raster is a synonym for the term ?
  1. Array
  2. Matrix
  3. Model
  4. All of above
Show/Hide Answer
Answer = B 
Explanation: N/A

10)  The ......... simply reads each successive byte of data from the frame buffer?
  1. Digital Controller
  2. Data Controller
  3. Display Controller
  4. All of above
Show/Hide Answer
Answer = C 
Explanation: A Video Display Controller or VDC is an integrated circuit which is the main component in a video signal generator, a device responsible for the production of a TV video signal in a computing or game system. Some VDCs also generate an Audio signal, but in that case it's not their main function.


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