Computer Graphics MCQs with Answers
Practice important Computer Graphics MCQs with answers and explanations.
Multiple Choice Questions
Q231: In a convex polygon, how many edges can a scan-line intersect at most (ignoring horizontal edges)?
- A: Two
- B: Three
- C: Four
- D: Five
View Answer
A
Q232: Which polygon type may have self-intersecting edges?
- A: Convex
- B: Concave
- C: Complex
- D: Regular
View Answer
C
Q233: Which of the following best defines a concave polygon?
- A: Edges cross each other
- B: All angles are right angles
- C: Some internal lines intersect edges
- D: No self-intersections
View Answer
C
Q234: Which rule is used in the scan-line algorithm to determine fill region?
- A: Even-odd rule
- B: Boundary rule
- C: Flood rule
- D: Odd-parity rule
View Answer
D
Q235: What happens when the number of edges crossed by a test line is odd?
- A: Point is inside polygon
- B: Point is outside polygon
- C: Point is on the edge
- D: Point is discarded
View Answer
A
Q236: What does a scan-line refer to?
- A: A horizontal pixel
- B: A horizontal line with constant y
- C: A vertical scan
- D: A diagonal line
View Answer
B
Q237: The parity of a scan-line starts as ______.
- A: Odd
- B: Even
- C: Neutral
- D: Zero
View Answer
B
Q238: In scan-line filling, what triggers a change from even to odd parity?
- A: Mouse click
- B: Polygon edge crossed
- C: Color mismatch
- D: Vertex skipped
View Answer
B
Q239: From where do we usually start the scan-line fill process?
- A: Top of polygon
- B: Outside point
- C: Interior point
- D: From each vertex
View Answer
C
Q240: When a polygon is unfilled, what is rendered?
- A: Area only
- B: Edges only
- C: Both area and edges
- D: Background color
View Answer
B