Computer Fundamental

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.

note!Answer: C) Monitor
The video graphics card processes display signals and sends them to the monitor.

note!Answer: B) Thermal printer
Thermal printers are non-impact printers that use heat. Dot matrix, daisy wheel and line printers strike the paper.

note!Answer: A) Inkjet printer
Inkjet printers spray ink without striking the paper, so they are non-impact. The other three are impact printers.

note!Answer: C) 24 pins
A 24-pin print head gives the densest dot pattern and the best quality among these options.

note!Answer: D) Line printer
Line printers are fast, high-volume printers and are the traditional choice for mainframe systems.