EASY
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Conversion to analog signal is known as modulation; conversion back to binary signal is known as demodulation.
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Important Questions on Computer Network
MEDIUM
The digital system operates on
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The time variations of signals are given as in and . Point out the true statement from the following.
MEDIUM
Show the variation of voltage with time, for a digital signal.
MEDIUM
In a synchronous modem, the digital-to-analog converter transmits signal to the _____.
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The state of signals is:
HARD
Compare analogue and digital signal transmission by considering the difference between analogue and digital signals and the benefits of digital when compared to analogue. Draw a diagram of an analogue wave and a digital wave.
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Name the device which can represent digital data by analog signals and vice-versa.
HARD
As the resources are reserved between two communicating end systems in circuit switching, this is achieved _____.
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Digital signals
(i) do not provide a continuous set of values
(ii) represent values as discrete steps
(iii) can utilize binary system and
(iv) can utilize decimal as well as binary systems
Which of the above statements are true ?
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What is meant by analogue and digital signals?
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In negative logic, logic state corresponds to
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When even-parity ASCII text is transmitted asynchronously at a rate of 10 characters per sec over a 110-bps line, what percentage of the received bits actually contain data (as opposed to overhead)?
HARD
What is the difference between analogue signal and digital signal?
EASY
The Binary Code equivalent of decimal 429 is
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Fork system call with fail if:
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Cotyledons are also called-
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The time variations of signals are given in and . Point out the true statement from the following.
EASY
The magnitude and phase of the complex Fourier series coefficients of a periodic signal are shown in the figure. Choose the correct statement form the four choices given. Notation: is the set of complex numbers, is the set of purely real numbers, and is the set purely imaginary numbers.
