Computer Graphics MCQ 02

1. A technique by which the vertical and /or horizontal scan frequency of video signal can be changed for different purpose and applications  is called
1. Scan conversion
2. Polygon filling
3. Two dimensional graphics
4. Anti aliasing
2. The method which perform the scan conversion by using large number of delay cells are called
1. Analogue method
2. Digital method
3. Complex method
4. None of these
3. Digital method is also known as
1. Normal method
2. Buffered method
3. Real time method
4. None of these
4. Analogue method is also known as
1. Normal method
2. Buffered method
3. Real time or memory less method
4. None of these
5. Digital method allows a picture to be stored in line or frame buffer with
1. Same speed
2. Different speed
3. Both a & b
4. None of these
6. A pixel may be defined as
1. Smallest size object
2. Larger size object
3. Medium size object
4. None of these
7. A position in plane known as
1. Line
2. Point
3. Graphics
4. None of these
8. A line can be represented by
1. One point
2. Two points
3. Three points
4. Four points
9. The process of coloring the area of a polygon is called
1. Polygon filling
2. Polygon flow
3.  Aliasing
4. None of these
10. How many types of polygon filling
1. Two
2. One
3. Three
4. Four
11.  The algorithm used for filling the interior of a polygon is called
1. Flood fill algorithm
2. Boundary fill algorithm
3. Scan line polygon fill algorithm
4. None of these
12. The function of scan line polygon fill algorithm are
1. Find intersection point of the boundary of polygon and scan line
2. Find intersection point of the boundary of polygon and point
3. Both a & b
4. None of these
13. If the pixel is already filled with desired color then leaves it otherwise fills it. this is called
1.   Flood fill algorithm
2. Boundary fill algorithm
3. Scan line polygon filling algorithm
4. None of these
14. A vector can be defined as
1. Intersection b/w two point position
2. Difference b/w two point position
3. Comparison b/w two point position
4. None of these
15. Bresanham circle algorithm uses the approach of
1. Midpoint
2. Point
3. Line
4. None of these
16. The side effect of scan conversion are
1. Aliasing
2. Anti aliasing
3. Both a & b
4. None of these
17. The process of reducing aliasing is called
1. Resolution
2. Anti aliasing
3. Sampling
4. None of these
18. Two basic technique for anti aliasing in ray tracing algorithm are
1. Pixel sampling and super sampling
2. Adaptive sampling and super sampling
3. Pixel sampling and super sampling
4. None of these
19. The problem of aliasing are
1. Staircase
2. Unequal brightness
3. Picket fence problem
4. All of these
20. The technique to minimizing aliasing are
1. Increased no of resolution
2. Modify pixel intensities
3. Super sampling
4. All of these
21. Lower persistence phosphorus is used in
1. Animation
2. Simple object
3. Complex object
4. All of these
22. Lower persistence phosphorus needs_________ refresh rate
1. Lower
2. Higher
3. Medium
4. None of these
23. Higher persistence phosphorus needs _________ refresh rate
1. Lower
2. Higher
3. Medium
4. None of these
24. Higher persistence phosphorus is used in
1. Animation
2. Simple object
3. Higher complex object
4. All of these
25. Phosphorus are of various types depending on
1. color
2. persistence
3. both a & b
4. none of these