Punjab Technical University 2010-5th Sem B.C.A Computer Application Computer Graphics ( ) - Question Paper
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Total No. of Questions : 13]
[Total No. of Pages : 02
(Please fill this Paper ID in OMR Sheet)
BCA (503) (S05) (LE) (O) (Sem. - 5th)
COMPUTER GRAPHICS Time : 03 Hours Maximum Marks : 75
Instruction to Candidates:
1) Section - A is Compulsory.
2) Attempt any Nine questions from Section - B.
Section - A
Q1) (15 x 2 = 30)
a) What is meant by the image resolution and images aspect ratio?
b) How different shades of colors are generated on the RGB monitors?
c) List the properties of the phosphorus used in the CRT monitors.
d) Why impact printers are so called?
e) What are the functions of a mouse?
f) What is the concept of refreshing in the CRTs?
g) What does the acronym pixel stands for? What are the characteristics of a pixel?
h) What are cartesian and homogeneous coordinate systems?
i) What is bit-map? How can it be used for character generation? j) What is the centre of projection in perspective projection?
k) What are flatbed and drum plotters?
l) What is the scan conversion? Why is it so called?
m) How can light pen differentiate between two points when both have the same color and intensity?
n) What is a window and a view port?
Q2) Explain the working principle of track-ball and mouse.
Q3) What are plasma panel displays? What are their advantages?
Q4) Write Bresenhems ellipse drawing algorithm with example.
Q5) Distinguish between parallel and perspective projections.
Q6) Write the Cohen-Sutherland outcode algorithm.
Q7) Show that the reflections in the line y = x and the line y = - x can be performed by a scaling operation followed by rotation.
Q8) Find the transformation matrix for rotation by an angle A with respect to the vector :
N = AI + BJ + CK
and a point given on the vector P (a, b, c)
Q9) Prove that the multiplication of three transformation matrices for each of the following sequence of operations is commutative :
(a) Any two successive translations.
(b) Any two successive scaling operations.
Q10) How can you realize the device independent graphics systems.
Q11) Draw neat sketch of Plasma-Panel display and explain its working. Compare its working with a CRT.
Q12) Explain clipping in 3-D viewing transformation.
Q13) Explain the working of hard-copy devices in detail.
A-79 2
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