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

1.103us

2.105us

3.107us

4.109us

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

1.amplitude

2.frequency

3.Phase

4.All of the above

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

1.Electronic signal

2.Magnetic pulses

4.Electromagnetic signals

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

1.Sine Waves

2.Levels

3.Stages

4.None of the above

1.12000 bps

2.6000 bps

3.1800bps

4.zero

## 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

## 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

1.medium

2.Period

3.Phase

4.delay

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

1.finite bandwidth

2.Infinite bandwidth

3. zero bandwidth

4. None of the above

1.64 kbps

2.32 kbps

3.128 kbps

4. 16 kbps

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

1.Noise

2.Attenuation

3.distortion

4.All of the above

## 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

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

1.Discrete state

2.Continuous state

3.Randomly arranged

4.None of the above

## 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

## 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

## Question: `Bit rate is measured in`

1.Bits per Hertz

2.Bits Per Second

3.Nano seconds

4.Pixels per second

1.1sec

2.2sec

3.10sec

4.100sec

1.High Frequency

2.Low Frequency

3.High Phase

4.Low phase

1.Modulation

2.Demodulation

3.Encapsulation

4.Bypass

1.Continuous

2.Discrete

3.Bits

4.Bytes

1.Second

2.Nanosecond

3.Hertz

4.Megahertz

1.87.9ms

2.41.7ms

3.90ms

4.12ms

1.one

2.two

3.four

4.three

## 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

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

1.Zero

2.Maximum

3.Infinite

4.None of the above

1.Wavelength

2.frequency

3.Period

4.Bandwidth

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

1.Sine wave

2.Digital Signals

3.Analog Signals

4.None of the above

## 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

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

1.Noisy Channel

2.Noiseless channel

3.Bandwidth of channel

4.Frequency of channel

1.10-3 s

2.10-6 s

3.10-9 s

4.10-12 s

## 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

1.Signals

2.Powers

3.Noise

4.Frequencies

## 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

## Question: ```SNR stands for ```

1.Shannon Noise ratio

2.Shannon Noise Relation

3.Signal Noise ratio

4.Signal Noise Relation

## 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

## Question: `The data rate depends upon`

1.Bandwidth

2.Level of signals

3.Level of noise

4.All of the above

1.Phase

2.Frequency

3.Period

4.Decibel

## 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

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

1.Bits per second

2.Hertz

3.Kilogram

4.Nanosecond

1.Wavelength

2.Bandwidth

3.amplitude

4.Composite

## 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

1.Wavelength

2.Period

3.Frequency

4.Phase

1.attenuation

2.distortion

3.Noise

4.Impairments

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

1.Latency

2.Propagation Time

3.Delay

4.Transmission time

1.Thermal Noise

2.Induced Noise

3.Cross talk

4.Impulse Noise

1.Kilograms

2.Seconds

3.Decibel

4.Hertz

1.Attenuated

2.Distorted

3.Noisy

4.Amplified

1.bandpass

2.Bypass

3.baseband

4.Low pass

## 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

1.fluctuate

2.Remains same

3.increases

4.decreases

## More MCQS

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