Latest B.Tech question paper of Computer Graphics, 2012,Chitkara University, Himachal Pradesh

This is a computer graphics question paper for the 6th semester , for the year 2012, Chitkara university , Himachal Pradesh. It is a combination of both multiple choice questions and theory based questions which will help students prepare for the exam in all aspects related to the subject, computer graphics.

Total time:03hours Max. Marks:100
General Instructions:
• All questions are compulsory.
• The question paper consists of 18 questions divided into 4 sections A,B,C and D.
• Section A comprises of 20 objective type questions of 1 mark each and having no negative marking for wrong answer.
• Section B comprises of 10 subjective type questions of 02 marks each.
• Section C comprises of 5 subjective type questions of 06 marks each.
• Section D comprises of 2 subjective type questions of 15 marks each.
• Make sure that you attempt the questions in order.
(Question 1 (i) to 1(xx) carry 1 mark each)

Q 1.
i. There are two types of computer graphics
A. Raster and vector
B. Raster and faster graphics.
C. Random and vector graphics.
D. Vector and scalar graphics.
ii. What would be scan converted value for points (3.3, 4.3)
A. 3,4
B. 4,5
C. 4,3
D. 3.3,4.3
iii. The more bits per pixel , the greater the number of
A. Possible colors
B. Possible texture
C. Both of these
D. None of these
iv. Physical pixels are the actual dots displayed on
A. An output device
B. An input device
C. Both input output
D. None of these
v. Bitmaps are composed of
A. Point
B. Pixels
C. Points and pixels
D. Lines
vi. What is the name of the devise that allows a person to hear sounds from the computer?
A. Speaker
B. Walkman
C. Mouse
D. Printer
vii. What could be used to output a picture when a hardcopy is not needed?
B. Printer
C. Pointer
viii. A firm uses what to produce a hardcopy of a detailed and accurate kitchen plans
A. Scanner
B. Plotter
C. Printer
ix. What is used to mark some exams with multiple choice questions?
B. Magnetic tape
C. Raster graphics
D. Random graphics
x. It can be used for producing invoices with carbon copies.
A. Printer
B. Fax machine
C. Photostat machine
D. None of these
xi. Which one is a line algo for line conversion
A. Midpoint
B. Bresenham's
C. Beizer
D. Both A and B
xii. Electron gun emits RGB color which corresponds to
A. Red, blue, green
B. Red, bleck, green
C. Red, brown, green
D. None of these
xiii. CRT consists of which coating
A. Phosphorous
B. Carbondioxide
C. Neon
D. Oxygen
xiv. LCD stands for
A. Liquid crystal display
B. Liquid carbon display
C. Liquefied crystal display
D. Liquid crystal design
xv. Which one is neither an input nor an output device
A. Magnetic tape
B. Floppy disc
C. Hard disk
D. All the three
xvi. CRT stands for
A. Computer ray tube
B. Cathode ray tube
C. Computer ray television
D. Cathode ray television
xvii. Maya software is used in which movie
A. Hanuma
B. Karan arjun
C. Titanic
D. Sampoorn ramayan
xviii. Which one is a 3-D movie example
A. Krish
B. Chota chetan
C. Dhoom
D. None of these
xix. Computer screen is an
A. Input device
B. Output device
C. Both
D. None
xx. What is the name of the computer hardware input device that allows a person to scan an image and download it to the computer
A. Plotter
B. Mouse
C. Keyboard
D. None of these

(Question 2 to 11 carry 2 marks each)
Q2. Define the terms Translation and scaling in three dimensional with their matrices.
Q3. What are principal vanishing points?
Q4. Is there any difference between windowing and view port? Answer with justification.
Q5.differenciate between boundary defined and interior defined region in filling.
Q6. Why is homogeneous coordinates used for transformation computations in CG?
Q7. Derive a composite matrix which maps a rectangular window into a rectangular view port using the basic geometric transformation in 2-D.
Q8. Name the various anomalies associated with the perspective projection.
Q9. Define the term clipping. Name any two algorithms for line clipping.
Q10. If a boundary is 8-connected; can 8-boundary fill algorithm be used to fill the region bounded by that boundary? If no why ?
Q11. Consider a raster system with a resolution of 1024 by 768, what is the size of the raster needed to store 8 bits per pixel?

(Questions 12 to 16 carry 6 marks each)
Q12. How random scan is different from raster scan display ?
Q13. Digitize the line from (12,16) to (1,24) by using bresenham's line drawing algo.
Q14. Derive the 3-D transformation matrix for rotating an object by an angle in a direction of YZ plane.
Q15. What do you mean by projection ? Differentiate between parallel and perspective projection.
Q16. Explain the Z-Buffer algo. What are the advantages of using z-buffer algo ?

(Question 17 to 18 carry 15 marks each)
Q17. Why line clipping algorithms are not used for clipping a polygon on line to line basis? Explain in detail Sutherland-Hodgeman polygon clipping algorithm.
Q18. (1) Let R be a rectangle window whose lower left corner is at (-3,1) and upper right corner is at (2,6). Clip the following line segments.
(a) AB A(-1,5) B(3,8)
(b) CD C(-4,2) D(-1,7)
(2) derive reflection transformation matrix in 2-D along a general line y=mx+c.


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