Explain the different technologies used in the touchscreens. What are scanning devices? Explain the basic characteristics of these devices. Explain hand-held scanners and drum scanners in detail. What is meant by optical recognition? What are the basic components of the OCR devices? Explain each component briefly.

How are OMR devices used for recognising the characters in the document to be scanned? Explain briefly the basic function of an MICR device. How does bar code reader help in recognising the characters on the labels? Defi ne digital camera. Explain the basic features of a digital camera. Briefly explain the different types of

What does voice recognition system mean? Explain the different methods used for identifying the voice of the user in the voice recognition system. What are data acquisition sensors? What are media input devices? Explain any two media input devices briefly. How can we enter data into a computer system with the help of graphics tablet?

Explain briefly any five pointing devices with the help of diagrams. What are flatbed scanners? Explain the basic function of a slide scanner. Which of the following printers print by spraying ink on the paper? A. Daisy wheel printer B. Dot matrix printer C. Drum printer D. Laser printer

Which of the following is not an output device? A. Scanner B. Plotter C. Printer D. Speaker  Which of the following monitors are commonly used with desktop computers? A. CBT monitors B. CRT monitors C. CPT monitors D. None of the above Which of the following are the properties of a printer? A. Resolution B.

Which of the following units can be used to measure the speed of a printer? A. Characters per inch (cpi) B. Dots per inch (dpi) C. Pages per minute (ppm) D. None of the above Which of the following devices are capable of producing large-format drawings like graphs and construction drawings? A. Dot matrix printers

Which of the following is a hard copy output device? A. Printer B. Speaker C. Display monitor D. Projector Which of the following is an impact printer? A. Dot matrix printer B. Ink-jet printer C. Laser printer D. All of the above Which of the following is a non-impact printer? A. Daisy wheel printer B.

Which of the following is one of the components of a CRT? A. Toner B. Liquid crystals C. Electromagnetic coils D. None of the above In which of the following plotters, both pen and papers are moved to produce an image? A. Drum plotter B. Electrostatic plotter C. Flat-bed plotter D. Ink-jet plotter In which

Which of the following are the components of a projector? A. Optic system B. Displays C. Electron beam D. Both A and B Which of the following are portable projectors? A. Conference room projectors B. Fixed installation projectors C. Ultralight projectors D. All of the above Which of the following devices are included in a

Which of the following is a type of terminal? A. Intelligent terminal B. Dumb terminal C. Both A and B D. All of the above What is an output device? Why is it a vital part of computer hardware? 2. Name some of the output devices, which are commonly used with the computer system. Define