Q. Beam-penetration and shadow-mask are the two basic techniques for producing color displays with a CRT.
Which of the following is not true ?
I. The beam-penetration is used with random scan monitors.
II. Shadow-mask is used in raster-scan systems.
III. Beam-penetration method is better than shadow-mask method.
IV. Shadow-mask method is better than beam-penetration method.

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Q. Line caps are used for adjusting the shape of the line ends to give them a better appearance. Various kinds of line caps used are

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Q. Given below are certain output primitives and their associated attributes. Match each primitive with its corresponding attributes :

List­ I                                  List - II

a. Line                                  i. Type, Size, Color

b.  Fill Area                           ii. Color, Size, Font

c.  Text                                  iii. Style, Color, Pattern

d.   Marker                            iv.Type, Width, Color

Codes :

a             b               c                  d 

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Q. Consider a window bounded by the lines : x = 0; y= 0; x = 5 and y = 3. The line segment joining (-1, 0) and (4, 5), if clipped against this window will connect the points

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Q. Which of the following color models are defined with three primary colors ?

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Q. Which of the following statement(s) is/are correct?

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Q. A segment is any object described by GKS commands and data that start with CREATE SEGMENT and Terminates with CLOSE SEGMENT command. What functions can be performed on these segments?

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Q. Match the following:

a. Glass                         i. Contains liquid crystal and serves
as a bonding surface for a conductive
coating.
b. Conductive coating ii. Acts as a conductor so that a voltage
can be applied across the liquid crystal.
c. Liquid Crystal           iii. A substance which will polarize light
when a voltage is applied to it.
d. Polarized film           iv. A transparent sheet that polarizes light.

Codes:
     a  b   c   d

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Q. Below are the few steps given for scan-converting a circle using Bresenham's Algorithm. Which of the given steps is not correct?

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Q. Which of the following is/are side effects of scan conversion?

a. Aliasing
b. Unequal intensity of diagonal lines
c. Over striking in photographic applications
d. Local or Global aliasing

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Q. Consider a line AB with A = (0,0) and B = (8, 4). Apply a simple DDA algorithm and compute the first four plots on this line.

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Q. Consider a raster grid having XY-axes in positive X-direction and positive upward Y-direction with Xmax = 10, Xmin = –5, Ymax = 11, and Ymin = 6. What is the address of memory pixel with location (5, 4) in raster grid assuming base address 1 (one)?

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Q. Consider a N-bit plane frame buffer with W-bit wide lookup table with W > N. How many intensity levels are available at a time?

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Q. Consider the Breshenham’s line generation algorithm for a line with gradient greater than one, current point (xi, yi) and decision parameter, di. The next point to be plotted (xi+1, yi+1) and updated decision parameter, di+1, for di < 0 are given as .................

(A) xi+1 = xi+1
yi+1 = yi
di+1 = di + 2 dy

(B) xi+1 = xi
yi+1 = yi + 1
di+1 = di + 2 dx

(C) xi+1 = xi
yi+1 = yi + 1
di+1 = di + 2 (dx – dy)

(D) xi+1 = xi + 1
yi+1 = yi + 1
di+1 = di + 2 (dy – dx)

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Q. A point P(2, 5) is rotated about a pivot point (1, 2) by 60°. What is the new transformed point P'?

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Q. In perspective projection (from 3D to 2D), objects behind the centre of projection are projected upside down and backward onto the view-plane. This is known as ..............

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Q. The Liang-Barsky line clipping algorithm uses the parametric equation of a line from (x1,y1) to (x2,y2) along with its infinite extension which is given as :

x = x1 + Dx.u
y = y1 + Dy.u

Where Dx = x2 – x1, Dy = y2 – y1, and u is the parameter with 0 ≤ u ≤ 1. A line AB with end points A(–1, 7) and B(11, 1) is to be clipped against a rectangular window with xmin=1, xmax=9, ymin=2, and ymax=8. The lower and upper bound values of the parameter u for the clipped line using Liang-Barsky algorithm is given as:

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Q. Consider the Breshenham’s circle generation algorithm for plotting a circle with centre (0,0) and radius ‘r’ units in first quadrant. If the current point is (x1,y1) and decision parameter is pi then what will be the next point (xi+1,yi+1) and updated decision parameter pi+1 for pi ≥ 0

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Q. A point P(5,1) is rotated by 90 degrees about a pivot point (2,2). What is the coordinate of new transformed point P’ ?

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Q. Let R be the rectangular window against which the lines are to be clipped using 2D Sutherland-Cohen line clipping algorithm. The rectangular window has lower left-hand corner at (-5,1) and upper right-hand corner at (3,7). Consider the following three lines for clipping with the given end point co-ordinates:

Line AB: A(-6,2) and B(-1,8)
Line CD: C(-1,5) and D(4,8)
Line EF: E(-2,3) and F(1,2)

Which of the following line(s) is/are candidate for clipping?

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