Computer Graphics multiple choice questions on Curve Attributes.
1. The basic parameter to curved attributes are
a) Type
b) Width
c) Color
d) All of the mentioned
Answer: d
Clarification: Type, width and colors are the basic parameters to curved attributes.
2. Raster curves of various widths can be displayed using
a) Horizontal or vertical spans
b) Horizontal spans
c) Vertical spans
d) Horizontal and vertical spans
Answer: a
Clarification: Raster curves of various widths can be displayed using Horizontal or vertical spans.
3. If the magnitude of the curve slope is lesser than 1, then
a) We can plot horizontal spans
b) We can plot vertical spans
c) Only b
d) All of the mentioned
Answer: c
Clarification: if slope magnitude 1 then we can plot vertical spans.
4. If the slope magnitude is 1, then circles, ellipse and other curves will appear
a) Thick
b) Thinnest
c) Big
d) Rough
Answer: b
Clarification: The magnitude value 1 displays thinnest curves, circles and ellipses.
5. One of the method for displaying thick curves is
a) Curve slope
b) Curve width
c) Curve cap
d) Only c
Answer: a
Clarification: This method fills the area b/w 2 parallel curves, whose separation distance=desired width.
6. The pixel masks for implementing line-type options are also used in the following algorithm to generate dashed and dotted patterns.
a) Raster line algorithm
b) Raster scan algorithm
c) Raster curve algorithm
d) Random curve algorithm
Answer: c
Clarification: Raster curve algorithm generates dashed and dotted patterns.
7. We can generate the dashes in the various octants and the circle path with vertical path using
a) Circles
b) Circle symmetry
c) Circle simmetry
d) Curve slope
Answer: b
Clarification: Circle symmetry generates dashes in the various octants, but we must shift the pixel positions to maintain the correct sequence.
8. The function of the pixel mask is
a) To display dashes and inter dash spaces according to the slope
b) To display curved attributes
c) To display the thick curves
d) None of these
Answer: a
Clarification: None.
9. If we want to display constant-length dashes, then we need to do the following.
a) We need to adjust the number of pixels plotted in each dash
b) We need to adjust the number of dots
c) We must use line-type functions
d) Neither a nor c
Answer: a
Clarification: Number of pixels plotted in each dash, will displays constant-length dashes.
10. The curves displayed with a rectangular pen will be
a) Thinner
b) Thicker and magnitude slope is 1
c) Thicker and magnitude slope >1
d) B or C
Answer: b