Related Questions

Which is the device that converts computer output into a form that can be transmitted over a telephone line?
A Teleport
B Multiplexer
C Concentrator
D Modem
Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?
A Interface
B Modem
C Attenuation
D Teleprocessor
E None of the above
Messages from one computer terminal can be sent to another by using data networks. The message to be sent is converted to an electronic digital signal, transmitted via a cable, telephone or satellite and then converted back again at the receiving end. What is this system of sending messages called?
A Paperless office
B Electronic mail
C Global network
D Electronic newspaper
E None of the above
In a PC to telephone hookup for long distance communication, modem is connected between the telephone line and
A PC
B synchronous port
C crossover cable
D asynchronous port
E None of the above
What is the name of the device that connects two computers by means of a telephone line?
A Tape
B modem
C bus
D cable
E None of the above
The barcode which is used on all types of items, is read by a scanning device directly into the computer. What is the name of this scanning device?
A Laser scanner
B Wand
C OCR
D MICR
E None of the above
A special type of device which uses an ordinary telephone with a computer is
A Light pen
B Mouse
C Acoustic couple
D Touch panel
E None of the above
Consider a company that assembles computers. The probability of a faulty assembly of any computer is p. The company therefore subjects each computer to a testing process. This testing process gives the correct result for any computer with a probability of q. What is the probability of a computer being declared faulty?
A pq + (1 - p) (1 - q)
B (1 - q)p
C (1 - p)q
D pq
Which of the following represents examples of an IT input device, output device and storage device respectively ?
A bar code reader, CD drive, projector
B keyboard, monitor, hard disc
C printer, DVD drive, joystick
D printer, mouse, monitor
A light sensitive device that converts drawing, printed text or other image into digital form is-
A Keyboard
B Plotter
C Scanner
D OMR

Next steps