__Computer Graphics Question__

__Sub Code__: - 1618604

2021(Even)

__Time : 3Hrs__

__
Semester VI(New)/CSE __

Computer
Graphics

Full
Marks : 70

Pass marks : 28

__Group A__

Choose the most suitable
answer from the following options: - (1*20=20)

(i) What is the fill form of GIF

(a) Graphical
Interface Format

(b) Graphical Interchange
Format

(c) Graphical Image
Format

(d) Graphical Image File

(ii) In LCD the refresh rate of the screen is

(a) 100 frame/sec

(b) 80 frame/sec

(c) 30 frame/sec

(d) 60 frame/sec

(iii) The two dimensional scaling equation in the matrix form is

(a)
P^{'} = P + T

(b)
P^{'} =P * R

(c)
P^{'} =S * P

(d)
P^{'} =R + S

(iv) Which of the following is not a type of
orthographic projection?

(a)
Top Projection

(b)
Side Projection

(c)
Cavalier Projection

(d)
Axonometric projection

(v) Which of the following is not a transformation
technique?

(a) Scaling

(b) Shearing

(c) Translation

(d) Revolution

(vi) If scaling parameter towards x-axis is 2 and
towards y-axis is 3 then after scaling new coordinate of point (-1,2) is

(a)
(2, 6)

(b)
(-3, 4)

(c)
(-2, 6)

(d)
(2, -6)

(vii) What is the full form of TIFF?

(a)
Tagged image full format

(b)
Translated image file format

(c)
Translated image full format

(d)
Tagged image file format

(viii) Which of
the following is not a input device?

(a)
Joystick

(b)
Light pen

(c)
Key board

(d)
Speaker

(ix) What is the full form of DDA algorithm?

(a)
Digital Difference Analyzer

(b)
Direct Differential Analyzer

(c)
Data Differential Analyzer

(d)
Digital Differential Analyzer

(x) If the scaling factor values S_{x} and S_{y
}are assigned to the same value them

(a) Uniform rotation is produced

(b) Uniform
Scaling is produced

(c) Scaling
cannot be done

(d) Both A and
B

(xi) On raster scan, lines are plotted with

(a)
Points

(b)
Dots

(c)
Pixels

(d)
None of the above

(xii) The transformation which is used to change the
size of an object is

(a)
Rotation

(b)
Scaling

(c)
Shearing

(d)
Translation

(xiii) The original coordinate of the point in polar coordinate
are

(a)
X^{'} = r cos (Î¸ + Ï•)
and Y^{'} = r cos (Î¸ + Ï•)

(b) X^{'} = r cos (Î¸ + Ï•)
and Y^{'} = r sin (Î¸ + Ï•)

(c) X^{'} = r cos (Ï•
- Î¸) and Y^{'} = r cos (Ï•
- Î¸)

(d) X^{'} = r cos (Ï•
+ Î¸) and Y^{'} = r sin (Ï•
- Î¸)

(xiv) To change the position of a circle or ellipse we
translate

(a)
Center coordinates and redraw the figure in
new location

(b)
Outline Coordinates

(c)
Center Coordinates

(d)
All of the mentioned

(xv) Which of the following is not a type of clipping?

(a)
Area clipping

(b)
Curve clipping

(c)
Pixel clipping

(d)
Text clipping

(xvi) In Breserham’s line drawing algorithm if the
distance d1<d2 then decision parameter P_{k} is

(a)
Positive

(b)
Negative

(c)
Equal

(d)
Zero

(xvii) The total number of regions in Cohen Sutherland
algorithm is

(a)
6

(b)
3

(c)
9

(d)
7

(xviii) Orthographic projection is also known as

(a)
Single view projection

(b)
Multi – view projection

(c)
Two view projection

(d)
All of the above

(xix) The number of pixels stored in the frame buffer
of a graphics system is called

(a)
Depth

(b)
Resolution

(c)
Sensitivity

(d)
Susceptivity

(xx) In a 2-D translation, a point (x, y) can move to
the new position (x^{’}_{, }y^{’}) by using the
equation

(a)
x^{’ }= x + dx and y^{’}
= y + dx^{ }

(b)
x^{’ }= x + dy and y^{’}
= y - dx^{ }

(c)
x^{’ }= x - dx and y^{’}
= y - dy^{ }

(d)
x^{’ }= x + dx and y^{’}
= y + dy

__Group:-"B"__

➥ Answer all Five Questions: -
(5*4=20)

**2. ** What is
Computer Graphics? Explain various applications of Computer Graphics.

**OR **

Explain two
dimensional transformation. Right name of different transformation techniques

**3.** Explain
parallel projection and perspective projection

** OR **

What do
you mean by animation? Explain types of animation system.

**4**. Explain
Cohen Sutherland algorithm.

**OR **

What do you mean by clipping? Explain different
clipping techniques

**5.** Explain
DDA line drawing algorithm with example

**OR**

Differentiate between Random scan and Rashtra scan?

**6.** Write
three any different display devices. Explain functioning of LCD and LED display

**OR**

Explain feeling techniques in computer graphics

__Group:- "C"__

➥ Answer all Five Questions: -
(5*6=30)

**7.** Write
algorithms for DDA line drawing techniques. Calculate the points between the
starting point (9, 18) and the ending point (14, 22) using DDA line drawing
algorithm

**OR**

Explain properties of Bezier curve and B-spline
curve. Explain the advantage of B-line curve over Bezier curve.

**8.** Explain
Bresenham's circle drawing algorithm. Plot 4 points of circle using bresenham's
algorithm with radius of 10 unit and centre (50, 50).

** OR**

Explain various three-dimensional transformation
with examples.

**9.** Explain
parallel projection. Explain different type of parallel projection.

** OR**

Explain
CRT with diagram. Right any three input and output devices used in computer
graphics.

**10.** Write
short notes on any two of the following: -

a.
Bresenham’s line drawing algorithm

b.
Perspective projection

c.
Polygon clipping

** OR**

Explain Windows and viewports. Write steps for
Cohen Sutherland algorithm.

**11.** Explain
two-dimensional transformation techniques. Explain shearing and scaling
technique in detail.

**OR**

Explain perspective projection. What do you mean
by hidden surface removal and back surface removal.

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