3 | Electrical measurements-Digital Communications MCQs set | Learn & Give Online MCQS Test ,MCQs: multiple choice questions and answers,Mock Tests and Practice Papers

Question:

 Ionospheric communication can take place in

1.High frequency band

2.Very high frequency band

3.Ultra high frequency band

4.Super high frequency band

Question:

 Modulation channel consists of

1.Amplifier

2.Signal processing units

3.Amplifier & Signal processing units

4.None of the mentioned

Question:

 The weighing matrix is

1.Positive quantity

2.Inverse of covariance matrix of the input vector

3.Positive quantity & Inverse of a covariance matrix of the input vector

4.None of the mentioned

Question:

A band-pass signal can be down-converted using

1.Sine wave

2.Cosine wave

3.Time delayed wave

4.None of the mentioned

Question:

A band-pass signal has a Fourier transform equal to

1.One

2.Zero

3.Infinity

4.Cannot be determined

Question:

A base-band signal can be up-converted using

1.Sine wave

2.Cosine wave

3.Filtering

4.None of the mentioned

Question:

A rectangular pulse of duration T is applied to a matched filter. The output of the filter is a

1.Rectangular pulse of duration T

2.Rectangular pulse of duration 2T

3.Triangular pulse

4.Sine function

Question:

A signal can be recovered from its sample by using

1.Low pass filter

2.High pass filter

3.Band pass filter

4.Band stop filter

Question:

A stationary stochastic process has

1.Finite energy signal

2.Infinite zero signal

3.Zero energy signal

4.None of the mentioned

Question:

According to Sampling theorem

1.Ts is greater than 1/2fm

2.Ts is lesser than 1/2fm

3.Ts is equal to 1/2fm

4.Ts is lesser than or equal to 1/2fm

Question:

ADSL has _____ information channels.

1.One

2.Three

3.Four

4.None of the mentioned

Question:

Aliasing can be removed using

1.Prefiltering

2.Postfiltering

3.Prefiltering & Postfiltering

4.None of the mentioned

Question:

Constellation diagram is plotted in

1.Constellation space

2. Signal space

3.Orthogonal space

4.Boundary space

Question:

Cumulative distributive function is

1.Non negative

2.Non decreasing

3.Non negative & decreasing

4.None of the mentioned

Question:

Flat top sampling or practical sampling has

1.Same frequency

2.Same amplitude

3.Same time difference

4.None of the mentioned

Question:

For a periodic function, the spectral density and auto correlation functions form

1.Fourier transform pair

2.Laplace transform pair

3.Hilbert transform pair

4.Z transform pair

Question:

Fourier transform of a signal gives the

1.Frequency content

2.Bandwidth

3.Frequency content & Bandwidth

4.None of the mentioned

Question:

Ground wave communication occurs in

1.Low frequency band

2.Medium frequency band

3.Low & Medium frequency band

4.None of the mentioned

Question:

If operating frequency bands are higher ______ is available.

1.Smaller bandwidth

2.Larger bandwidth

3.Smaller & Larger bandwidth

4.Cannot be determined

Question:

In a communication system, a process in which statistical averages and time averages are equal is called as

1.Stationary

2.Ergodic

3.Gaussian

4.Poisson

Question:

In down-conversion multiplication with cosine wave is followed by

1.Low pass filter

2.High pass filter

3.Bandpass filter

4.Bandstop filter

Question:

In flat top sampling scheme, ______ is kept constant after sampling.

1.Amplitude

2.Phase

3.Frequency

4.Time period

Question:

In the digital communication system, signals in different frequency bands are

1.Orthogonal

2.Non orthogonal

3.Orthogonal & Non orthogonal

4.None of the mentioned

Question:

Loop filter is a ______ used to reduce noise.

1.Low pass filter

2.High pass filter

3.Band pass filter

4.Band reject filter

Question:

Modulation channel does not accept an analog input signal.

1.True

2.False

Question:

Multiplication of input signal with pulse train is done in ________ sampling.

1.Impulse sampling

2.Natural sampling

3.Flat top sampling

4.None of the mentioned

Question:

Non uniform tree _____ bit rate.

1.Increases

2.Decreases

3.Does not affect

4.None of the mentioned

Question:

Possible timing error detection methods are

1.Early late

2. Zero crossing

3.Early late & Zero crossing

4.None of the mentioned

Question:

Properties of Fourier transform are

1.Duality property

2.Time shifting property

3.Modulation property

4.All of the mentioned

Question:

Properties of impulse function are

1.Symmetry

2.Time scaling

3.Shifting

4.All of the mentioned

Question:

Random things in a communication system are

1.Timing offset

2.Device frequency

3.Attenuation

4.All of the mentioned

Question:

Sampling theorem is used for converting

1.Continuous time signal to discrete

2.Discrete to continuous time signal

3.Continuous time signal to discrete & vice versa

4.None of the mentioned

Question:

Satellite communication takes place in

1.Ultra high frequency band

2.Super high frequency band

3.Ultra & Super high frequency band

4.None of the mentioned

Question:

The auto-correlation of white noise is

1.A delta function

2.A constant

3.Gaussian

4.None of the mentioned

Question:

The capacity of a channel is given by

1.Number of digits used in coding

2.Volume of information it can take

3.Maximum rate of information transmitted

4.Bandwidth requires information

Question:

The effects of aliasing are ________

1.Attenuation of high frequency spectral replicates

2.Non uniform spectral gain applied to desired baseband spectrum

3.Attenuation and non uniform spectral gain

4.None of the mentioned

Question:

The fourier tranform of one impulse train is also another impulse train with a period of the output equal to the

1.Period of the input

2.Reciprocal of the period of input signal

3.Half the period of input

4.Twice the period of the input

Question:

The line code has a zero dc component for pulse transmission of random binary data is

1.NRZ

2.RZ

3.Alternate mark inversion

4.None of the mentioned

Question:

The output of sampling process are called as ________

1.Pulse code modulation

2.Pulse amplitude modulation

3.Frequency modulation

4.Amplitude modulation

Question:

The power spectral density function of the stochastic process is

1.Real

2.Odd

3.Real & odd

4.None of the mentioned

Question:

The process in which the top of each pulse in the output samples retains the shape of the analog segment is called as ________

1.Natural sampling

2.Ideal sampling

3.Aliasing

4.None of the mentioned

Question:

The sampling process includes methods such as

1.Filtering

2.Sample and hold

3.Amplifying

4.None of the mentioned

Question:

Two clock with rates T1 and T2 are incommensurate if its ratio is

1.Rational

2.Irrational

3.Equal

4.None of the mentioned

Question:

Voltage generated by lightning is an example for

1.Energy signal

2.Power signal

3.Energy & Power signal

4.None of the mentioned

Question:

Which are non negative functions?

1.PDF

2. PMF

3.PDF & PMF

4.None of the mentioned

Question:

Which are orthonormal signal representation?

1.Sine and cosine at same frequency

2.Wavelets

3.Complex sinusoids at a different frequency

4.All of the mentioned

Question:

Which can be used for periodic and non periodic?

1.Fourier series

2.Fourier transforms

3.Fourier series & transforms

4.None of the mentioned

Question:

Which has minimum power loss during transmission?

1.Twisted Copper cable at 1KHz

2.Optical fiber

3.Twisted copper cable at 100KHz

4.Wave guide

Question:

Which is practically realizable?

1.A train of pulses

2.Impulse train

3.All of the mentioned

4.None of the mentioned

Question:

Which process is more economical?

1.Undersampling

2.Oversampling

3.Aliasing

4.None of the mentioned

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Electrical measurements-Digital Communications MCQs set/3 Sample Test,Sample questions

Question: Ionospheric communication can take place in

Question: Modulation channel consists of

Question: The weighing matrix is

Question: A band-pass signal can be down-converted using

Question: A band-pass signal has a Fourier transform equal to

Question: A base-band signal can be up-converted using

Question: A rectangular pulse of duration T is applied to a matched filter. The output of the filter is a

Question: A signal can be recovered from its sample by using

Question: A stationary stochastic process has

Question: According to Sampling theorem

Question: ADSL has _____ information channels.

Question: Aliasing can be removed using

Question: Constellation diagram is plotted in

Question: Cumulative distributive function is

Question: Flat top sampling or practical sampling has

Question: For a periodic function, the spectral density and auto correlation functions form

Question: Fourier transform of a signal gives the

Question: Ground wave communication occurs in

Question: If operating frequency bands are higher ______ is available.

Question: In a communication system, a process in which statistical averages and time averages are equal is called as

Question: In down-conversion multiplication with cosine wave is followed by

Question: In flat top sampling scheme, ______ is kept constant after sampling.

Question: In the digital communication system, signals in different frequency bands are

Question: Loop filter is a ______ used to reduce noise.

Question: Modulation channel does not accept an analog input signal.

Question: Multiplication of input signal with pulse train is done in ________ sampling.

Question: Non uniform tree _____ bit rate.

Question: Possible timing error detection methods are

Question: Properties of Fourier transform are

Question: Properties of impulse function are

Question: Random things in a communication system are

Question: Sampling theorem is used for converting

Question: Satellite communication takes place in

Question: The auto-correlation of white noise is

Question: The capacity of a channel is given by

Question: The effects of aliasing are ________

Question: The fourier tranform of one impulse train is also another impulse train with a period of the output equal to the

Question: The line code has a zero dc component for pulse transmission of random binary data is

Question: The output of sampling process are called as ________

Question: The power spectral density function of the stochastic process is

Question: The process in which the top of each pulse in the output samples retains the shape of the analog segment is called as ________

Question: The sampling process includes methods such as

Question: Two clock with rates T1 and T2 are incommensurate if its ratio is

Question: Voltage generated by lightning is an example for

Question: Which are non negative functions?

Question: Which are orthonormal signal representation?

Question: Which can be used for periodic and non periodic?

Question: Which has minimum power loss during transmission?

Question: Which is practically realizable?

Question: Which process is more economical?

More MCQS

Search

Olete Team

Question:
Ionospheric communication can take place in

Question:
Modulation channel consists of

Question:
The weighing matrix is

Question:
A band-pass signal can be down-converted using

Question:
A band-pass signal has a Fourier transform equal to

Question:
A base-band signal can be up-converted using

Question:
A rectangular pulse of duration T is applied to a matched filter. The output of the filter is a

Question:
A signal can be recovered from its sample by using

Question:
A stationary stochastic process has

Question:
According to Sampling theorem

Question:
ADSL has _____ information channels.

Question:
Aliasing can be removed using

Question:
Constellation diagram is plotted in

Question:
Cumulative distributive function is

Question:
Flat top sampling or practical sampling has

Question:
For a periodic function, the spectral density and auto correlation functions form

Question:
Fourier transform of a signal gives the

Question:
Ground wave communication occurs in

Question:
If operating frequency bands are higher ______ is available.

Question:
In a communication system, a process in which statistical averages and time averages are equal is called as

Question:
In down-conversion multiplication with cosine wave is followed by

Question:
In flat top sampling scheme, ______ is kept constant after sampling.

Question:
In the digital communication system, signals in different frequency bands are

Question:
Loop filter is a ______ used to reduce noise.

Question:
Modulation channel does not accept an analog input signal.

Question:
Multiplication of input signal with pulse train is done in ________ sampling.

Question:
Non uniform tree _____ bit rate.

Question:
Possible timing error detection methods are

Question:
Properties of Fourier transform are

Question:
Properties of impulse function are

Question:
Random things in a communication system are

Question:
Sampling theorem is used for converting

Question:
Satellite communication takes place in

Question:
The auto-correlation of white noise is

Question:
The capacity of a channel is given by

Question:
The effects of aliasing are ________

Question:
The fourier tranform of one impulse train is also another impulse train with a period of the output equal to the

Question:
The line code has a zero dc component for pulse transmission of random binary data is

Question:
The output of sampling process are called as ________

Question:
The power spectral density function of the stochastic process is

Question:
The process in which the top of each pulse in the output samples retains the shape of the analog segment is called as ________

Question:
The sampling process includes methods such as

Question:
Two clock with rates T1 and T2 are incommensurate if its ratio is

Question:
Voltage generated by lightning is an example for

Question:
Which are non negative functions?

Question:
Which are orthonormal signal representation?

Question:
Which can be used for periodic and non periodic?

Question:
Which has minimum power loss during transmission?

Question:
Which is practically realizable?

Question:
Which process is more economical?