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geetika's Questions & Answers

in TV & Radio, Delhi& Health

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Total Points: 4210

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what is tape?

Asked by kajol devgan in TV & Radio at 7:34 PM on April 28, 2008

geetika's Answer

tape is an external storage medium, usually both readable and writable, consisting of a loop of flexible celluloid-like material that can store data in the form of tiny magnetic fields that can be read and also erased. The magnetic tape is housed in a plastic cartridge similar to that of an audio or video cassette. Because the tapes, which are recorded by a device called a tape drive, are portable and inexpensive to purchase, tape is often used for backing up or archiving data. A drawback of tape is that it can only be accessed by starting at the beginning and rolling through the tape until the desired data is located.

Answered at 2:55 PM on April 29, 2008

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what is music?

Asked by kajol devgan in TV & Radio at 7:32 PM on April 28, 2008

geetika's Answer

Music is the sounds produced by singers or musical instruments or reproductions of such sounds.

Answered at 2:48 PM on April 29, 2008

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what is multiplexing

Asked by manoj in Delhi at 10:35 AM on April 27, 2008

geetika's Answer

Multiplexing is sending multiple signals or streams of information on a carrier at the same time in the form of a single, complex signal and then recovering the separate signals at the receiving end. In analog transmission, signals are commonly multiplexed using frequency-division multiplexing (FDM), in which the carrier bandwidth is divided into subchannels of different frequency widths, each carrying a signal at the same time in parallel. In digital transmission, signals are commonly multiplexed using time-division multiplexing (TDM), in which the multiple signals are carried over the same channel in alternating time slots. In some optical fiber networks, multiple signals are carried together as separate wavelengths of light in a multiplexed signal using dense wavelength division multiplexing(DWDM).

Answered at 4:26 PM on April 27, 2008

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what is computer?

Asked by kajol devgan in TV & Radio at 7:33 PM on April 28, 2008

geetika's Answer

An electronic device that has the ability to store, retrieve, and process data, and can be programmed with instructions that it remembers.

Answered at 2:41 PM on April 29, 2008

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what is movie?

Asked by kajol devgan in TV & Radio at 7:33 PM on April 28, 2008

geetika's Answer

Movie is a term that encompasses individual motion pictures, the field of film as an art form, and the motion picture industry. Films are produced by recording images from the world with cameras, or by creating images using animation techniques or special effects.

Answered at 2:45 PM on April 29, 2008

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