Computer Graphics MCQs with Answers
Practice important Computer Graphics MCQs with answers and explanations.
Chapter: 7
Q221:
Hyperbolas differ from parabolas because they
A. Have only one branch
B. Have asymptotes
C. Are circular
D. Are bounded by foci
Correct Answer:
B
Chapter: 7
Q222:
Hyperbolas have how many branches?
A. 1
B. 2
C. 3
D. None
Correct Answer:
B
Chapter: 7
Q223:
Vertices of hyperbola are always located
A. a units from center
B. b units from focus
C. Exactly at focus
D. Between asymptotes
Correct Answer:
A
Chapter: 8
Q224:
What is the primary purpose of filled-area primitives in graphics?
A. To sketch models
B. To store data
C. To make solid models
D. To erase drawings
Correct Answer:
C
Chapter: 8
Q225:
Which of the following is NOT a method used for area filling?
A. Boundary-fill
B. Flood-fill
C. Scan-line fill
D. Line clipping
Correct Answer:
D
Chapter: 8
Q226:
Scan-line polygon fill begins by drawing lines between ______.
A. edges and center
B. points and center
C. edges of the polygon
D. vertices and base
Correct Answer:
C
Chapter: 8
Q227:
Which fill method starts from an interior point and paints outward until boundary is reached?
A. Scan-line fill
B. Boundary-fill
C. Edge-fill
D. Vertex-fill
Correct Answer:
B
Chapter: 8
Q228:
Which technique is a variation of boundary-fill used for clusters with no defined boundary?
A. Scan-line fill
B. Flood-fill
C. Point-fill
D. Paint-fill
Correct Answer:
B
Chapter: 8
Q229:
A polygon is defined as a shape formed by ______.
A. curves and arcs
B. intersecting lines
C. closed line segments
D. line segments placed end to end
Correct Answer:
D
Chapter: 8
Q230:
Which type of polygon ensures that no line between internal points intersects the edges?
A. Concave
B. Complex
C. Convex
D. Irregular
Correct Answer:
C
Chapter: 8
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
Correct Answer:
A
Chapter: 8
Q232:
Which polygon type may have self-intersecting edges?
A. Convex
B. Concave
C. Complex
D. Regular
Correct Answer:
C
Chapter: 8
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
Correct Answer:
C
Chapter: 8
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
Correct Answer:
D
Chapter: 8
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
Correct Answer:
A
Chapter: 8
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
Correct Answer:
B
Chapter: 8
Q237:
The parity of a scan-line starts as ______.
A. Odd
B. Even
C. Neutral
D. Zero
Correct Answer:
B
Chapter: 8
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
Correct Answer:
B
Chapter: 8
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
Correct Answer:
C
Chapter: 8
Q240:
When a polygon is unfilled, what is rendered?
A. Area only
B. Edges only
C. Both area and edges
D. Background color
Correct Answer:
B