# Computer Hardware and Networking/NETWORKING Sample Test,Sample questions

## Question: ``` A sine wave is ________.```

1.periodic and continuous

2.aperiodic and continuous

3.periodic and discrete

4.aperiodic and discrete

## Question: ``` A _________ sine wave is not useful in data communications; we need to send a _______ signal```

1.composite; single-frequency

2.single-frequency; composite

3.single-frequency; double-frequency

4.none of the above

1.noisy

2.noiseless

3.bandpass

4.low-pass

1.noisy

2.noiseless

3.bandpass

4.low-pass

1. 5 KHz

2.10 KHz

3.47 KHz

4. 57 KHz

1. 5 KHz

2.10 KHz

3.47 KHz

4. 57 KHz

1.programs

2.dialogs

3.protocols

4.bits

1.Frequency

2.Phase

3.Phase Shift

4.Time period

1.frequency

2.period

3.bandwidth

4.amplitude

## Question: ``` The _________ product defines the number of bits that can fill the link.```

1.bandwidth-period

2. frequency-amplitude

3.bandwidth-delay

4.delay-amplitude

1.line

2.block

3.NRZ

4. Manchester

## Question: ``` _____ signals can have an infinite number of values in a range. ```

1.Analog

2.Digital

3.(a) or (b)

4.None of the above

1.1 Hz

2.100 Hz

3.1 KHz

4.1 MHz

## Question: `A signal is measured at two different points. The power is P1 at the first point and P2 at the second point. The dB is 0. This means ________.`

1.P2 is zero

2.P2 equals P1

3.P2 is much larger than P1

4.P2 is much smaller than P1

## Question: `A sine wave in the ______ domain can be represented by one single spike in the _____ domain.`

1.time; frequency

2.frequency; time

3.time; phase

4. phase; time

## Question: `A(n)_________ signal is a composite analog signal with an infinite bandwidth.`

1.digital

2.analog

3.either (a) or (b)

4.neither (a) nor (b)

## Question: `As frequency increases, the period ________.`

1.decreases

2.increases

3.remains the same

4.doubles

1.low-pass

2.bandpass

3.low rate

4.high rate

## Question: ```Baud means? ```

1.The number of bits transmitted per unit time

2.The number of byted transmitted per unit time

3.The rate at which the signal changes

4.None of the above

## Question: ```Before data can be transmitted, they must be transformed to ________. ```

1.periodic signals

2.electromagnetic signals

3.aperiodic signals

4.low-frequency sine waves

## Question: ```Data can be ________. d. none of the above```

1.analog

2.digital

3.(a) or (b)

4.None of the above

## Question: `Frequency and period are ______.`

1.inverse of each other

2.proportional to each other

3.the same

4.None of the above

## Question: `Given two sine waves A and B, if the frequency of A is twice that of B, then the period of B is ________ that of A.`

1.one-half

2.twice

3.the same as

4. indeterminate from

1. low-pass

2.bandpass

3. low rate

4.high rate

## Question: `If the maximum amplitude of a sine wave is 2 V, the minimum amplitude is ________ V.`

1.2

2.1

3.-2

4.between -2 and 2

1.peak amplitude

2.frequency

3.phase

4.slope

## Question: `In a time-domain plot, the horizontal axis is a measure of ________.`

1.signal amplitude

2.frequency

3.phase

4.time

## Question: ```In asynchronous serial communication the physical layer provides ```

1.start and stop signalling

2.flow control

3.both (a) and (b)

4.None of the mentioned

## Question: ```physical layer provides ```

1.mechanical specifications of electrical connectors and cables

2.electrical specification of transmission line signal level

3.specification for IR over optical fiber

4.all of the mentioned

## Question: ```Signals can be ________. ```

1.analog

2.digital

3.either (a) or (b)

4.neither (a) nor (b)

## Question: `The physical layer concerns with`

1.bit-by-bit delivery

2.process to process delivery

3.application to application delivery

4.None of the above

## Question: ```The physical layer is responsible for ```

1.line coding

2.channel coding

3.modulation

4.all of the mentioned

## Question: ```The portion of physical layer that interfaces with the media access control sublayer is called ```

1.physical signalling sublayer

2.physical data sublayer

4.none of the mentioned

## Question: `The _______ is the physical path over which a message travels.`

1.Signal

2.Protocol

3.Medium

4.All of the above

1.line

2.block

3.NRZ

4.Manchester

## Question: ```What is the bandwidth of a signal that ranges from 1 MHz to 4 MHz? ```

1.4 MHz

2.1 KHz

3.3 MHz

4.None of the above

## Question: ```When propagation speed is multiplied by propagation time, we get the ________. ```

1.throughput

2.wavelength of the signal

3.distortion factor

4.distance a signal or bit has traveled

1.Bridge

2.Hub

3.Gateway

4.Repeater

1.DNS Server

2.Switch

3.Hub

4.Gateway

1.Hub

2.Switch

3.Gateway

4.Modem

1.Attenuation

2.Distortion

3.Noise

4.Decibel

1.Attenuation

2.Distortion

3.Noise

4.Decibel

1.Frequency

2.Phase

3.Amplitude

4.Voltage

## Question: ```______ can impair a signal. ```

1.Attenuation

2.Distortion

3.Noise

4.All of the above

## Question: `_______ data are continuous and take continuous values.`

1.analog

2.digital

3.(a) or (b)

4.None of the above

## Question: ```_______ data have discrete states and take discrete values. ```

1.Analog

2.Digital

3.(a) or (b)

4.None of the above

## Question: `_______ encoding has a transition at the middle of each bit.`

1.RZ

2.Manchester

3.Differential Manchester

4.All of the above

1. Attenuation

2.Distortion

3.Noise

4.Decibel

## Question: ```_______ signals can have only a limited number of values. ```

1.Analog

2.Digital

3.(a) or (b)

4.None of the above

1.Amplitude

2.Time

3.Frequency

4.Voltage

## More MCQS

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