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Q. Explain Frequency-division multiplexing?
Frequency-division multiplexing (FDM) is a technique for data transmission widely used in telephone, radio, and cable TV systems in which the transmission frequency spectrum (i.e., bandwidth) is divided into smaller bands known as subchannels.
Data transmission between two stations can be achieved in either simplex, half-duplex, or full-duplex mode. In a simplexmode,mainly used in radio and TV broadcasts, information travels only in one direction. Thismode is rarely used in data communications. In half-duplexmode, used by radio communications, information may travel in both directions, but only in one direction at a time. The transmitter becomes the receiver and vice versa. In a full-duplex mode, information may travel in both directions simultaneously. This mode, used in telephone systems, adopts two different carrier frequencies.
All digital devices are made from circuits whichcan be switched between two possible states.These two states are represented by a voltagelevel at the output of the circuit e.g. 0V
#what is the history of computer science
You have been retained to examine how many check-in agents should be used at a check-in counter for a big hotel. During normal business hours, customers arrive at a rate of about 2
Digital circuits also manipulate logicalexpressione.g. IF account is in credit THEN allow phoneto make calls.So a digital circuit must determine if somethingis TRUE or FALSE. Norma
Enumerate about the trackball A trackball is a two-dimensional positioning device, a spaceball provides six degrees of freedom. Unlike the trackball, a spaceball does not actua
Reprographic Methods i) Thermography ii) Dyeline jii) Microfiche iv) Fax In this unit you have learnt that: Used for Methods of reprography are used for the
Q. Datatype Functions for Message Passing? Datatype: It denotes type of data in message. This field is essential in the sense that MPI supports heterogeneous computing and diff
function of operating system
In general, all public processes of a controller class are treated as action processes. If you require prevent this default behaviour, just decorate the public process with NonActi
Discuss the different techniques with which a file can be shared among different users. Several popular techniques with that a file can be shared among various users are: 1
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