Computer Hardware and Networking/NETWORKING /PHYSICAL LAYER SET 4 Sample Test,Sample questions

Question: ``` A period of 100 ms in microseconds would be equals to```

1.103us

2.105us

3.107us

4.109us

Posted Date:-2022-06-18 11:00:06

Question: ``` A sine wave is defined by```

1.amplitude

2.frequency

3.Phase

4.All of the above

Posted Date:-2022-06-18 12:03:38

Question: ``` Data to be transmitted must be transformed into```

1.Electronic signal

2.Magnetic pulses

4.Electromagnetic signals

Posted Date:-2022-06-18 13:01:38

Question: ``` Digital signals are represented in ```

1.Sine Waves

2.Levels

3.Stages

4.None of the above

Posted Date:-2022-06-18 12:07:04

Question: ``` If a noiseless channel with a bandwidth of 3000 Hz transmitting a signal with two signal levels the maximum Bit rate would be```

1.12000 bps

2.6000 bps

3.1800bps

4.zero

Posted Date:-2022-06-18 12:41:56

Question: ``` In induced noise, the impairment is created by sources like```

1.Motor & appliances

2.Power lines

3.the sending and receiving antenna

4.Motion of electrons in wire

Posted Date:-2022-06-18 13:00:29

Question: ``` SNR (signal to noise ratio) is equals to```

1.Avg signal power/Avg noise power

2.Avg signal power/Avg distortion

3.Avg noise power/Attenuation

4.Avg Attenuation/Avg distortion

Posted Date:-2022-06-18 13:05:07

Question: ``` The propagation speed of electromagnetic signals depends on the```

1.medium

2.Period

3.Phase

4.delay

Posted Date:-2022-06-18 12:26:49

Question: ```A digital signal is a composite analog signal with ```

1.finite bandwidth

2.Infinite bandwidth

3. zero bandwidth

4. None of the above

Posted Date:-2022-06-18 12:05:00

Question: `A digitized voice channel is made by digitizing a 4-kHz bandwidth analog voice signal. We need to sample the signal at twice the highest frequency (two samples per hertz). We assume that each sample requires 8 bits. What is the required bit rate?`

1.64 kbps

2.32 kbps

3.128 kbps

4. 16 kbps

Posted Date:-2022-06-18 13:33:10

Question: `A transmission media can have signal impairment because of`

1.Noise

2.Attenuation

3.distortion

4.All of the above

Posted Date:-2022-06-18 12:53:15

Question: `According to Fourier analysis, any composite signal is a combination of sine waves with`

1.diff frequencies amplitude, and phase

2.different frequencies

3.same frequencies

4.same frequencies with amplitude and phase

Posted Date:-2022-06-18 13:24:46

Question: ```Analog data refers to information that is ```

1.Discrete state

2.Continuous state

3.Randomly arranged

4.None of the above

Posted Date:-2022-06-18 11:03:09

Question: `Assume we need to download text documents at the rate of 100 pages per second. What is the required bit rate of the channel?`

1.1.846 Mbps

2.1.536 Mbps

3.2.4 Mbps

4.None of the Mentioned

Posted Date:-2022-06-18 13:31:43

Question: ```Bit length can be defined in terms of ```

1.high and low frequency

2.Propagation Speed

3.Bit duration

4.both b and c

Posted Date:-2022-06-18 12:40:43

Question: `Bit rate is measured in`

1.Bits per Hertz

2.Bits Per Second

3.Nano seconds

4.Pixels per second

Posted Date:-2022-06-18 11:10:31

Question: `Bit Rate is the number of bits sent in`

1.1sec

2.2sec

3.10sec

4.100sec

Posted Date:-2022-06-18 12:19:53

Question: ```Change over a long span of time means ```

1.High Frequency

2.Low Frequency

3.High Phase

4.Low phase

Posted Date:-2022-06-18 12:23:09

Question: `Conversion of digital signal to analog signal is`

1.Modulation

2.Demodulation

3.Encapsulation

4.Bypass

Posted Date:-2022-06-18 12:02:32

Question: `Digital data refers to the information that is`

1.Continuous

2.Discrete

3.Bits

4.Bytes

Posted Date:-2022-06-18 12:00:47

Question: `Frequency is expressed in`

1.Second

2.Nanosecond

3.Hertz

4.Megahertz

Posted Date:-2022-06-18 12:56:19

Question: ```Given the frequency 24Hz the corresponding period would be c. d. ```

1.87.9ms

2.41.7ms

3.90ms

4.12ms

Posted Date:-2022-06-18 12:57:47

Question: `How many factors data rate limit depends on`

1.one

2.two

3.four

4.three

Posted Date:-2022-06-18 13:26:47

Question: `If a periodic signal is decomposed into five sine waves with frequencies of 100, 300, 500, 700, and 900 Hz, what is its bandwidth?`

1.2500 Hz

2.900 Hz

3.800 Hz

4.canâ€™t be determined with the information given

Posted Date:-2022-06-18 13:29:08

Question: `If signal does not change at all, its frequency is`

1.Zero

2.Maximum

3.Infinite

4.None of the above

Posted Date:-2022-06-18 10:58:57

Question: `In baseband transmission, the required bit rate is proportional to the`

1.Wavelength

2.frequency

3.Period

4.Bandwidth

Posted Date:-2022-06-18 12:20:44

Question: ```In data communications, the non periodic signals ```

1.Sine wave

2.Digital Signals

3.Analog Signals

4.None of the above

Posted Date:-2022-06-18 12:10:20

Question: `In data communications, we use periodic analog signals and`

1.Periodic digital signals

2.Non periodic analog signals

3.Non periodic digital signals

4.both a and c

Posted Date:-2022-06-18 12:48:49

Question: `In real life, we cannot have a`

1.Noisy Channel

2.Noiseless channel

3.Bandwidth of channel

4.Frequency of channel

Posted Date:-2022-06-18 12:52:32

Question: ```One Picoseconds (PS) is equivalent to ```

1.10-3 s

2.10-6 s

3.10-9 s

4.10-12 s

Posted Date:-2022-06-18 13:20:54

Question: ```Periodic analog signals can be classified as ```

1.Simple analog signal

2.Composite analog signal

3.Multiple Sine waves

4.All of the above

Posted Date:-2022-06-18 11:59:30

Question: `Signal to Noise Ratio is the ratio of the two`

1.Signals

2.Powers

3.Noise

4.Frequencies

Posted Date:-2022-06-18 13:23:41

Question: ```Sine wave can be represented by three parameters ```

1.peak amplitude, frequency and bandwidth

2. Frequency, phase and bandwidth

3.Peak amplitude, frequency and Phase

4.Peak amplitude, bandwidth, Period

Posted Date:-2022-06-18 12:45:03

Question: ```SNR stands for ```

1.Shannon Noise ratio

2.Shannon Noise Relation

3.Signal Noise ratio

4.Signal Noise Relation

Posted Date:-2022-06-18 13:03:22

Question: `The bandwidth of a composite signal is the difference between the highest and`

1.zero frequency

2.lowest frequencies

3.two Parallel frequencies

4.None of the above

Posted Date:-2022-06-18 12:54:22

Question: `The data rate depends upon`

1.Bandwidth

2.Level of signals

3.Level of noise

4.All of the above

Posted Date:-2022-06-18 11:09:18

Question: `The difference in the delay of the signal may create a difference in`

1.Phase

2.Frequency

3.Period

4.Decibel

Posted Date:-2022-06-18 13:22:37

Question: `The power in our house can be represented by`

1.sine wave with a peak amplitude

2.sine wave with amplitude

3.sine wave with phase

4.sine wave with frequency

Posted Date:-2022-06-18 12:59:23

Question: `The range of frequencies a channel can pass is called bandwidth in`

1.Bits per second

2.Hertz

3.Kilogram

4.Nanosecond

Posted Date:-2022-06-18 12:45:51

Question: ```The range of frequencies contained in a composite signal is its ```

1.Wavelength

2.Bandwidth

3.amplitude

4.Composite

Posted Date:-2022-06-18 12:49:43

Question: `The relationship between amplitude and frequency can be represented by`

1.frequency-domain plot.

2.Time-domain plot

3. Phase Domain Plot

4. Amplitude domain Plot

Posted Date:-2022-06-18 12:55:18

Question: `The term that describes the position of the waveform relative to time 0 is`

1.Wavelength

2.Period

3.Frequency

4.Phase

Posted Date:-2022-06-18 12:14:23

Question: `The term that refers to loss of strength of a signal is called`

1.attenuation

2.distortion

3.Noise

4.Impairments

Posted Date:-2022-06-18 12:11:00

Question: ```The time required for a bit to travel from source to destination is ```

1.Latency

2.Propagation Time

3.Delay

4.Transmission time

Posted Date:-2022-06-18 12:47:51

Question: `The transmission impairment that refers to a signal with high energy in a very short time is`

1.Thermal Noise

2.Induced Noise

3.Cross talk

4.Impulse Noise

Posted Date:-2022-06-18 12:27:55

Question: `The unit that is used to express the state of a signal is`

1.Kilograms

2.Seconds

3.Decibel

4.Hertz

Posted Date:-2022-06-18 11:07:39

Question: `The value of the decibel is positive, if signal is`

1.Attenuated

2.Distorted

3.Noisy

4.Amplified

Posted Date:-2022-06-18 12:12:07

Question: `We cannot send the digital signal directly to the channel, when the channel is`

1.bandpass

2.Bypass

3.baseband

4.Low pass

Posted Date:-2022-06-18 13:21:49

Question: `We send a voice signal from a microphone to a recorder, the transmission is`

1.Base band transmission

3.both a and b

4.None of the above

Posted Date:-2022-06-18 11:06:49

Question: `When there is heavy traffic on the network, the queuing time is`

1.fluctuate

2.Remains same

3.increases

4.decreases

Posted Date:-2022-06-18 12:46:53

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