EASY
Earn 100
What is the function of modem?
Important Questions on Computer Network
MEDIUM
Given below are two statements:
Statement I : A speech signal of is used to modulate a carrier signal of . The bandwidth requirement for the signal is .
Statement II : The side band frequencies are and . In the light of the above statements, choose the correct answer from the options given below:
EASY
The number of amplitude-modulated broadcast stations that can be accommodated in a bandwidth for the highest modulating frequency will be:
EASY
A carrier wave of peak voltage is used for transmitting a message signal. The peak voltage of the modulating signal given to achieve a modulation index of will be:
EASY
The process of superimposing a signal frequency on the carrier wave is known as
MEDIUM
An amplitude modulated waves is represented by expression . The minimum and maximum amplitudes of the amplitudes modulated wave are, respectively:
EASY
A signal is transmitted using as carrier wave. The correct amplitude modulated signal is:
EASY
A carrier wave is made to vary between and by a modulating signal. What is the modulation index?
MEDIUM
Show the variation of voltage with time, for a digital signal.
EASY
Fork system call with fail if:
MEDIUM
The digital system operates on
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.
EASY
What is meant by analogue and digital signals?
EASY
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
EASY
Name the device which can represent digital data by analog signals and vice-versa.
EASY
The time variations of signals are given as in and . Point out the true statement from the following.
HARD
As the resources are reserved between two communicating end systems in circuit switching, this is achieved _____.
EASY
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 ?
