B.C.A. (Semester (CBCS) Examination Nov/Dec-2018
COMPUTER GRAPHICS
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
Figures to the right indicate full marks.
Q.1 Choose the correct alternatives:- 14
Types of computer graphics are
Vector Raster Scalar Raster
Vector Scalar None of these
A translation is applied to an object by
Repositioning it along with straight line path
Repositioning it along with circular path
Both a b
None of these
The quality of an image is depending on
No. of pixel used in image
No. of line used by image
No. of resolution used by image
All of above
Graphics software packages are available for?
Graphics Picture
Chart All of above
The major component of CRT is?
Electronic Gun Phosphor coated screen
Deflection Yoke All of above
Two basic technique for producing color display with a CRT are
Shadow mask and random scan
Beam penetration and shadow mask method
Random scan and raster scan
None of above
In Bresenham's algorithm, while generating a circle, it is easy to generate?
One octant first and other by successive reflection
One octant first and other by successive rotation
One octant first and other by successive translation
All octants
In 2D-translation, a point can move to the new position by using
the equation
x dx and y dx x dx and y dy
x dy and y dx x dx and y dy
Orthographic projection represents three dimensional objects in
One dimension Two dimension
Three dimension All of the above
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10) Reflection of a point about x-axis, followed by a counter-clockwise rotation of
90º, is equivalent to reflection about the line?
x y
x y x y 1
11) The subcategories of orthographic projection are?
Isometric, diametric, trimetric Cavalier, cabinet
Cavalier, cabinet, isometric None of these
12) Which of the following techniques is used in Midpoint Subdivision algorithm?
Heap sort Bubble sort
Binary Search Linear Search
13) The selection and separation of a part of text or image for further operation
are called
Translation Shear
Reflection Clipping
14) is a point on a circle that has center at the origin. Which of the following
points are also on circle?

All of above
Q.2 Answers the following: [Any Four] 08
What do you mean by computer graphics?
What is vanishing point?
What is clipping?
What is DVST?
What is vector graphics?
Write a note on: [Any Two] 06
What are the applications of computer graphics?
Differentiate Raster Random scan display.
What is beam penetration method?
Q.3 Answers the following: [Any Two] 08
Explain merits demerits of plasma panel display.
Write a note on parallel projection.
What is viewing transformation?
Answers the following: [Any One] 06
Explain about Brassenham's line draw algorithm.
Explain DDA line drawing Algorithm. Also write Advantage
Disadvantages.
Q.4 Answers the following: [Any Two] 10
Explain CRT monitor in detail.
Describe cohen-sutherland clipping line algorithm under 2D co-ordinate
system?
What is transformation? Explain its types in detail.
Answers the following: [Any One] 04
Scale the polygon with coordinates by two units in
x direction two units in y direction.
Explain reflection shear. Also write the matrices.
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Q.5 Answer the following. (Any Two) 14
Consider the line from to Use the simple DDA algorithm to
rasterize this line.
Explain 3D geometric transformation in detail.
Apply the shearing transformation to square with
as given below.
Shear parameter value of 0.5 relative to the line yref
Shear parameter value of 0.5 relative to the line xref