Computer Graphics MCQs with Answers
Practice important Computer Graphics MCQs with answers and explanations.
Multiple Choice Questions
Q261: Unfilled polygons display only the ______.
- A: Inside pixels
- B: Boundary lines
- C: Scan-lines
- D: Color fills
View Answer
B
Q262: What is the initial value of parity when filling a polygon using the scan-line algorithm?
- A: Odd
- B: Even
- C: Zero
- D: Undefined
View Answer
B
Q263: What is selected as the initial scan-line in the scan-line polygon fill algorithm?
- A: Highest Y value
- B: Zero
- C: Y value = 10
- D: Y value = 20
View Answer
C
Q264: Which table contains edges to be processed for a given scan-line?
- A: Vertex Table
- B: Scan-Line Table
- C: Active Edge Table
- D: Global Point Table
View Answer
C
Q265: What does the value 1/m represent in the active edge table?
- A: Inverse slope
- B: Length of edge
- C: Height of edge
- D: X-coordinate of midpoint
View Answer
A
Q266: The polygon is filled between intersections on a scan-line where the parity is ______.
- A: Even
- B: Odd
- C: Zero
- D: None of these
View Answer
B
Q267: To compute the next x value in the edge table, which formula is used?
- A: x1 = x0 * m
- B: x1 = x0 - m
- C: x1 = x0 + 1/m
- D: x1 = x0 + m
View Answer
C
Q268: When does an edge get removed from the active edge table?
- A: When its x value is minimum
- B: When y-min > current scan-line
- C: When max y = scan-line
- D: When slope = 0
View Answer
C
Q269: Which edge values are updated after each scan-line pass?
- A: Only max y
- B: Only x and 1/m
- C: X and max y
- D: Only y-min
View Answer
B
Q270: If two edges have the same y-min, how are they sorted in the active edge table?
- A: By slope
- B: By x value
- C: By y-max
- D: By midpoint
View Answer
B