Computer Graphics MCQs with Answers
Practice important Computer Graphics MCQs with answers and explanations.
Chapter: 11
Q381:
Differential scaling changes the _______ of an object.
A. size only
B. shape only
C. color
D. position
Correct Answer:
B
Chapter: 11
Q382:
In scaling, if Sx and Sy are less than 1, the object will _______.
A. enlarge
B. shrink
C. rotate
D. move
Correct Answer:
B
Chapter: 11
Q383:
When scaling about a fixed point (xf, yf), translation is applied _______ scaling.
A. after
B. before
C. during
D. without
Correct Answer:
B
Chapter: 11
Q384:
Which equation represents scaling with respect to origin?
A. x' = x + Sx, y' = y + Sy
B. x' = x × Sx, y' = y × Sy
C. x' = x/Sx, y' = y/Sy
D. x' = Sx - x, y' = Sy - y
Correct Answer:
B
Chapter: 11
Q385:
Positive rotation angle means rotation is _______.
A. clockwise
B. anti-clockwise
C. horizontal
D. vertical
Correct Answer:
B
Chapter: 11
Q386:
After applying scaling factors, the circle radius changes by multiplying with _______.
A. average of Sx and Sy
B. Sx only
C. Sy only
D. both Sx and Sy separately
Correct Answer:
A
Chapter: 11
Q387:
Which matrix is used for rotating a point?
A. Scaling matrix
B. Rotation matrix
C. Translation matrix
D. Reflection matrix
Correct Answer:
B
Chapter: 11
Q388:
To move a line, we translate each of its _______.
A. middle points
B. end points
C. midpoints only
D. angles
Correct Answer:
B
Chapter: 11
Q389:
Scaling with Sx ≠ Sy results in _______ scaling.
A. uniform
B. differential
C. origin-based
D. translation
Correct Answer:
B
Chapter: 11
Q390:
Rotation about an arbitrary pivot point involves _______ steps.
A. two
B. three
C. four
D. five
Correct Answer:
B
Chapter: 11
Q391:
In scaling with respect to a fixed point, the new x-coordinate is:
A. x.Sx
B. x.Sx + xf(1-Sx)
C. xf.Sx + x(1-Sx)
D. x.Sx - xf
Correct Answer:
B
Chapter: 11
Q392:
A square after differential scaling becomes _______.
A. circle
B. rectangle
C. triangle
D. parallelogram
Correct Answer:
B
Chapter: 11
Q393:
Translate (2,3) by tx=4, ty=5. New coordinates are _______.
A. (6,8)
B. (5,7)
C. (8,6)
D. (7,8)
Correct Answer:
D
Chapter: 11
Q394:
Rotate point (1,0) by 90 degrees about origin. New coordinates are _______.
A. (0,1)
B. (-1,0)
C. (1,0)
D. (0,-1)
Correct Answer:
A
Chapter: 11
Q395:
Scaling a circle with Sx=2, Sy=2 results in _______.
A. ellipse
B. same circle with double radius
C. rectangle
D. square
Correct Answer:
B
Chapter: 11
Q396:
In translation, vector T represents _______.
A. pivot point
B. rotation matrix
C. shift vector
D. scale factor
Correct Answer:
C
Chapter: 12
Q397:
In 2D transformations, the basic operations include translation, rotation, and _______.
A. Shearing
B. Scaling
C. Reflection
D. Projection
Correct Answer:
B
Chapter: 12
Q398:
What is the formula for translation in basic 2D transformations?
A. P' = T + P
B. P' = P + T
C. P' = T.P
D. P' = S.P
Correct Answer:
B
Chapter: 12
Q399:
In basic 2D rotation, which formula is correct?
A. P' = R.P
B. P' = P + R
C. P' = R + P
D. P' = S.P
Correct Answer:
A
Chapter: 12
Q400:
Which matrix type is used to eliminate matrix addition in translations?
A. 2x2 matrix
B. 3x3 matrix
C. 4x4 matrix
D. 5x5 matrix
Correct Answer:
B