UGC NET CSE | Junet 2015 | Part 3 | Question: 17

Question

Which of the following statements is/are incorrect?

1. Mapping the co-ordinates of the points and lines that form the picture into the appropriate co-ordinates on the device or workstation is known as viewing transformation
2. The right-handed cartesian co-ordinates system in whose co-ordinates we describe the picture is known as world co-ordinate system
3. The co-ordinate system that corresponds to the device or workstation where the image is to be displayed is known as physical device co-ordinate system
4. Left-handed co-ordinate system in which the display area of the virtual display device corresponds to the unit $(\mid x \mid)$ square whose lower left-hand corner is at the origin of the co-ordinate system, is known as normalized device co-ordinate system
   • A. $\text{i only}$
   • B. $\text{i and ii}$
   • C. $\text{iii only}$
   • D. $\text{iv only}$

Answer 1

ans is D only it is incorrect

normalized device co-ordinate system Normalized device coordinates (NDCs) make up a coordinate system that describes positions on a virtual plotting device. The lower left corner corresponds to (0,0), and the upper right corner corresponds to (1,1). 

NDCs can be used when you want to position text, lines, markers, or polygons anywhere on the plotting device (that may or may not already contain a plot). 

Rest options are  are correct 

 An image is stored in the memory of the computer in a Cartesian coordinate system typically known as World Coordinate System.

When the same picture is seen in a display device it is displayed in physical device coordinate system.

Mapping the co-ordinates of the points and lines that form the picture into the appropriate co-ordinates on the device or workstation is known as viewing transformatio