Computer & IT

note!Answer: A) Character
A character scanner is designed to read printed characters by sliding it along a line of text. OCR software can then recognize the scanned characters as editable text.

note!Answer: A) bar-code
UPC barcodes are read by bar-code scanners that detect the pattern of bars and spaces.

note!Answer: B) MICR
MICR (Magnetic Ink Character Recognition) reads characters printed in magnetic ink, as on bank cheques.

note!Answer: A) MICR
MICR is used by banks to read the magnetic-ink account numbers at the bottom of cheques.

note!Answer: C) OMR
OMR (Optical Mark Recognition) detects filled-in marks on answer sheets, as used in standardized tests.

note!Answer: A) Webcam
A webcam is a small video camera that sends live images over the Internet.

note!Answer: D) Digitizing
Digitizers convert drawings or figures into digital form that a computer can process.

note!Answer: B) Digital notepad
A digital notepad records the movements of a user's pen or stylus over a writing surface and converts the handwriting or drawings into digital data.

note!Answer: B) Resolution
Resolution is an important characteristic of a monitor. It refers to the number of pixels displayed horizontally and vertically. Higher resolution generally produces sharper, more detailed images.

note!Answer: C) Pixels
Pixels are the individual picture elements that together form the image on a screen.

note!Answer: B) XGA
XGA is the display standard with a resolution of 1024x768 pixels.

note!Answer: B) Cathode ray tube
CRT monitors use the same electron-beam technology as traditional televisions.

note!Answer: A) ink-jet
Ink-jet printers spray tiny droplets of ink onto paper to form characters.

note!Answer: D) Thermal
Thermal printers need heat-sensitive special paper that darkens when heated.

note!Answer: C) Plotter
Plotters are designed to print very large drawings such as engineering and architectural plans.

note!Answer: B) Port
A port is a connection point on a computer, not a network device like a modem, bridge, or router.

note!Answer: B) 2
Software is generally classified into two categories: system software and application software.

note!Answer: D) Display screen
A display screen shows output electronically, which is softcopy. Printers and plotters give hardcopy.

note!Answer: C) Plotters
Plotters produce printed hardcopy on paper. CRT, monitors and screens display softcopy output.

note!Answer: C) Speaker
A speaker converts electrical signals into sound, so it is the sound output device. A microphone is an input device.