## Computer Graphics Questions and Answers Part-8

1. A basic fill style is selected in a PHIGS program with the function
a) setInteriorStyle (fs)
b) setStyle (fs)
c) SetfillStyle (fs)
d) setInteriorStyleIndex (fs)

Explanation: We can select the basic fill style by using setInteriorStyle (fs).

2. Which one is not a type of basic fill styles?
a) Hollow
b) solid color
c) Pattern
d) Dark

Explanation: Dark fill is not a type of basic fill style, rest of them is the basic fill styles

3. The process of filling an area with rectangular pattern is called
a) Tiling
b) Linear fill
c) Tint-fill
d) Soft-fill

Explanation: Rectangular fill pattern is called tiling or tiling pattern.

4. The algorithm which repaints an area that was originally painted by merging a foreground color F and background color B where F!=B.
a) Tint fill
b) Flood fill
c) Linear soft-fill
d) Boundary fill

Explanation: Linear soft-fill algorithm used to repaint the area.

5. The fill color that is combined with the background color is known as
a) Soft fill
b) Tint fill
c) Both a and b
d) None

Explanation: soft fill is also called tint fill.

6. Hatch fill procedures are implemented to draw
a) Single hatching
b) Cross hatching
c) Either a or b
d) Only b

Explanation: This procedure is used to draw either single or cross hatching

7. When 2 background colors B1 and B2 are mixed with foreground color F, the resulting pixel color P is
a) P=t0*F+t1*B1+(1-t0-t1)B2
b) P=t0*F-t1*B1+(1-t0-t1)B2
c) P=t0*F+t1*B1+(1+t0+t1)B2
d) None of the above

Explanation: P=t0*F+t1*B1+(1-t0-t1)B2

8. The operator that is used for combining a fill pattern with a background pattern is
a) AND operator
b) OR operator
c) X-OR operator
d) All of these

Explanation: The pattern and background colors can be combined using Boolean operators.

9. Hollow areas are displayed using only the
a) Boundary outline
b) Line-drawing routine
c) Hatched patterns
d) Closed poly line