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Previous Year Exam Questions for Computer Graphics - CG of 2017 - bput by Verified Writer

  • Computer Graphics - CG
  • 2017
  • PYQ
  • Biju Patnaik University of Technology Rourkela Odisha - BPUT
  • Information Technology Engineering
  • B.Tech
  • 333 Offline Downloads
  • Uploaded 1 year ago
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Registration No: Total Number of Pages: 02 B.Tech PIT5J001 5th Semester Regular Examination 2017-18 Computer Graphics BRANCH: : IT Time: 3 Hours Max Marks: 100 Q.CODE: B483 Answer Question No.1 and 2 which are compulsory and any four from the rest. The figures in the right hand margin indicate marks. Q1 a) b) c) d) e) f) g) h) i) j) Q2 a) b) c) d) e) f) g) h) i) j) Q3 a) b) Q4 a) b) Answer the following questions: multiple type or dash fill up type On a monochromatic monitor, the frame buffer is known as... a) Display file b) Pixmap c) Bitmap d) Refresh buffer The most commonly used output device in a graphics system is a _____. The distance from one pixel to the next pixel is called.... a)Resolution b)Dot Pitch c)Pixmap d)ppi A world co-ordinate area selected for display is called a ________. The standard aspect ratio for PC is........... a) 6:5 b) 4:3 c)3:2 d)5:3 In raster scan display, the frame buffer holds... a)Line drawing commands b)Scanning instructions c)Image Resolution d) Intensity information Ans: Intensity information Beam penetration method is usually used in.......... a)LCD b)Raster Scan display c) Random scan display d)DVST Identify the odd one out. a) Mouse b) Keyboard c) Trackball d) Space ball The translation distances (dx, dy) is called as a) Translation vector b) Shift vector c) Both a and b d) Neither a nor b The process of mapping a world window in world coordinate system to viewport are called a) Transformation viewing b) Viewport c) Clipping window d) Screen coordinate system (2 x 10) Answer the following questions: Short answer type What are the drawbacks of DDA line drawing algorithm? What is scan conversion? What is the need for Homogeneous co-ordinates in 2D transformations? Why good graphics programming avoids the use of floating-point operations? Write the properties of video display devices? What is antialiasing? What are the multimedia file formats? Write the properties of Bezier curve? What is the aspect ratio of a 12 in X 16 in display? What is computer animation and what are the steps of animation sequence? (2 x 10) Discuss about translation, rotation, scaling, reflection and shear in 2D transformation? Write the working principle of CRT display device with neat sketch diagram? (10) What do you mean by 2_D viewing transformation pipeline? Derive a normalization matrix that maps a window specified by co-ordinates (1,1) and (4,5) onto a viewport specified by co-ordinates (2,4) and (8,10)? List down the steps to scan-convert a circle using Bresenham‘s algorithm? (10) (5) (5)

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Q5 a) What is clipping? Explain the 3-cases of line visibility in Cohen-Sutherland line clipping algorithm? (10) b) Which raster location would be chosen by Bresenham‘s algorithm while scan converting a line from screen coordinate (1, 1) to screen coordinate (8, 5)? (5) Q6 a) b) What are the different kinds of projections? Explain them with diagrams? Discuss about DVST, raster scan and random scan displays? (10) (5) Q7 a) What is Seed Fill Algorithm? Explain using an example? What is Boundary Fill algorithm? Explain any one method of polygon representation with help of an example? (10) Explain how Z-buffer method and scan line methods differ to find visible surface detection? Prove the two successive rotations are additive? (10) What are hypertext and hypermedia? What is the relation between multimedia, hypermedia and hypertext? Discuss with example? What are Gouraud and Phong shading? (10) b) Q8 a) b) Q9 a) b) (5) (5) (5)

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