UGC NET CSE | December 2013 | Part 3 | Question: 61

Question

Which of the following is not true with respect to to a trackball and/or spaceball?

1. A trackball is a two dimensional positioning device while as a spaceball provides six degrees of freedom
2. Unlike the trackball a spaceball does not actually move
3. A trackball is a three dimensional positioning device while as a spaceball provides six degrees of freedom
   • A. I and II
   • B. II and III
   • C. II only
   • D. III only

Answer 1

option D is the ans as statement III is incorrect

First two statements are correct

 

A spaceball is a "six degrees of freedom" device. It allows full rotation in multiple directions, such as with a CAD model. a trackball, however is merely a standard mouse. rather than having the ball moved by the mouse platform, you manually actuate the ball. it just moves the cursor around. the libsball page has a nice image showing the spaceball's range and type of motion. a trackball just does XY axis motion.

Comments

	Trackball	Spaceball
Definition	The computer cursor that controls  all the actions in a notebook or laptops.	An artificial cursor that controls all the actions within a program.
Usage	An upside-down mouse that gets placed within a socket and keeps on rotating at the same point.	A 3D graphical input device that gets fixed on a spherical ball.
Scope	Suitable for computer devices along with notebooks and laptops.	Suitable for computer software such as AutoCAD, Solid Works, Ansys, and others.
Actions	Click, Open, Move	Rotate, Pan, Zoom, etc.