Computer Graphics MCQs with answers Page - 9

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A

Admin • 833.24K Points
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Q. Which of the following algorithms to fill polygons was the one used by real rasterizers?

  • (A) flood-fill polygons
  • (B) scan-line polygon
  • (C) boundary fill polygons
  • (D) none of above

A

Admin • 833.24K Points
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Q. Active edge table is used in following algorithm

  • (A) boundary fill
  • (B) region fill
  • (C) scan line
  • (D) edge fill

A

Admin • 833.24K Points
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Q. Scan line polygon filling algorithm uses series of ……………. To fill the polygon.

  • (A) scan lines
  • (B) points
  • (C) layers
  • (D) none of above

A

Admin • 833.24K Points
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Q. In scan line algorithm, Scan lines are processed in increasing (upward) / decreasing (downward) --------------------------.

  • (A) y order
  • (B) x order
  • (C) pixel order
  • (D) color order

A

Admin • 833.24K Points
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Q. When the current scan line in Scan line polygon fill algorithm moves above the upper / below the lower endpoint, the edge

  • (A) becomes inactive
  • (B) becomes active
  • (C) is discarded
  • (D) is added.

A

Admin • 833.24K Points
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Q. The edges crossed by current scan line in Scan line polygon fill algorithm are called as

  • (A) active edges
  • (B) inactive edges
  • (C) marked edges
  • (D) none of these

A

Admin • 833.24K Points
Coach

Q. Scan line Fill Approach works at the

  • (A) color level
  • (B) edge level
  • (C) polygon level
  • (D) pixel level

A

Admin • 833.24K Points
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Q. Following are the data structures used in Scan line algorithm to increase the efficiency.

  • (A) active edge list
  • (B) active edge table
  • (C) both a and b
  • (D) neither a or b

A

Admin • 833.24K Points
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Q. Scan line polygon filling algorithm starts from

  • (A) either ymax or ymin
  • (B) either xmax or xmin
  • (C) only xmax
  • (D) only xmin

A

Admin • 833.24K Points
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Q. Scan line polygon filling algorithm can be used for filling Convex polygon.

  • (A) true
  • (B) false
  • (C) cant say
  • (D) none of these

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