Computer Fundamental Miscellaneous - Study Mode

[#401] A device designed to read information encoded into a small plastic card is
Correct Answer

(B) Badge reader

Explanation

Solution: Badge Reader : A Dictionary of Computing. badge reader A device designed to read information encoded into a small plastic card. It is often part of a data collection system in which each operator can be identified by the badge they present to the machine.

[#402] A hybrid computer uses a _____ to convert digital signals from a computer into analog signals.
Correct Answer

(C) Modem

Explanation

Solution: Modem : Modem is short for "Modulator / Demodulator." It is a hardware component that allows a computer or other device, such as a router or switch, to connect to the Internet. It converts or "modulates" an analog signal from a telephone or cable wire to a digital signal that a computer can recognize. Similarly, it converts outgoing digital data from a computer or other device to an analog signal.

[#403] A group of magnetic tapes, videos or terminals usually under the control of one master is
Correct Answer

(B) Cluster

Explanation

Solution: A group of magnetic tapes, videos or terminals usually under the control of one master is Cluster.

[#404] Any device that performs signal conversion is
Correct Answer

(A) Modulator

Explanation

Solution: Modulator : In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted. ... A modem (from modulator–demodulator) can perform both operations.

[#405] Codes consisting of light and dark marks which may be optically read is known as
Correct Answer

(B) Bar code

Explanation

Solution: Bar code : A barcode (also bar code) is an optical, machine-readable, representation of data; the data usually describes something about the object that carries the barcode. Initially, barcodes were only scanned by special optical scanners called barcode readers. Barcode was invented by Norman Joseph Woodland and Bernard Silver and patented in US in 1952. For Example :