Use any suitable grid size for your representation 37

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: e between a wired and a cordless mouse. 22. What is the minimum number of buttons required in a mouse? How does it help having more number of buttons than the minimum requirement? 23. What is a trackball? How is it different from a mouse? 24. Explain how a trackball is used to notify the system of a particular choice out of a given set of choices or the monitor's screen. 25. What is a joystick? How is it different from a trackball? Give some typical uses of a joystick. 26. Explain how an electronic pen is used as an input device. 27. Describe the working mechanism of a light pen input device. 28. Describe some of the typical applications for which writing pen with pad is suitable as an input device. 29. What is a Personal Digital Assistant? What type of input device is most suitable for it? 30. What is a touch screen device? Explain the technology used in making touch screen devices. 31. Give some typical applications for which touch screen is most suitable as an input device. 32. What is an information kiosk? Give some typical uses of an information kiosk. 33. Write short notes on: (a) Mouse (b) Trackball (c) Joystick (d) Electronic Pen (e) Touch screen (f) Information kiosk (g) Personal digital assistants 34. What are data scanning devices? How do they help in improving input data accuracy as compared t< keyboard devices? 35. What is an image scanner? Explain how it inputs a given image document. 36. What is meant by bit map representation of an image? Give the bit map representation of the letter 'A'. Use any suitable grid size for your representation. 37. What is the minimum number of bits required to encode each grid point (pixel) in the bit map representation of an image? How does it help having more number of bits than the minimum requirement? 38. Differentiate between a flat-bed and a hand-held image scanner? 39. What are the limitations of an image scanner when it is used for inputting text documents? How does an OCR device overcomes these limitations? 40. Explain how...
View Full Document

This document was uploaded on 04/07/2014.

Ask a homework question - tutors are online