Computer Graphics Questions & Answers – 2D Scaling

1. The transformation that is used to alter the size of an object is
a) Scaling
b) Rotation
c) Translation
d) Reflection
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2. The two-dimensional scaling equation in the matrix form is
a) P’=P+T
b) P’=S*P
c) P’=P*R
d) P’=R+S
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3. Scaling of a polygon is done by computing
a) The product of (x, y) of each vertex
b) (x, y) of end points
c) Center coordinates
d) Only a
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4. If the scaling factors values sx and sy < 1 then
a) It reduces the size of object
b) It increases the size of object
c) It stunts the shape of an object
d) None
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5. If the scaling factors values sx and sy are assigned to the same value then
a) Uniform rotation is produced
b) Uniform scaling is produced
c) Scaling cannot be done
d) Scaling can be done or cannot be done
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6. If the scaling factors values sx and sy are assigned to unequal values then
a) Uniform rotation is produced
b) Uniform scaling is produced
c) Differential scaling is produced
d) Scaling cannot be done
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7. The objects transformed using the equation P’=S*P should be
a) Scaled
b) Repositioned
c) Both a and b
d) Neither a nor b
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8. We control the location of a scaled object by choosing the position is known as
a) Pivot point
b) Fixed point
c) Differential scaling
d) Uniform scaling
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9. If the value of sx=1 and sy=1 then
a) Reduce the size of object
b) Distort the picture
c) Produce an enlargement
d) No change in the size of an object
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10. The polygons are scaled by applying the following transformation.
a) X’=x * Sx + Xf(1-Sx) and Y’=y * Sy + Yf(1-Sy)
b) X’=x * Sx + Xf(1+Sx) and Y’=y * Sy + Yf(1+Sy)
c) X’=x * Sx + Xf(1-Sx) and Y’=y * Sy – Yf(1-Sy)
d) X’=x * Sx * Xf(1-Sx) and Y’=y * Sy * Yf(1-Sy)
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Sanfoundry Global Education & Learning Series – Computer Graphics.

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