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
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
Data to be transmitted must be transformed into
1.Electronic signal
2.Magnetic pulses
3.Radiations
4.Electromagnetic signals
Posted Date:-2022-06-18 13:01:38
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Conversion of digital signal to analog signal is
1.Modulation
2.Demodulation
3.Encapsulation
4.Bypass
Posted Date:-2022-06-18 12:02:32
Digital data refers to the information that is
1.Continuous
2.Discrete
3.Bits
4.Bytes
Posted Date:-2022-06-18 12:00:47
Frequency is expressed in
1.Second
2.Nanosecond
3.Hertz
4.Megahertz
Posted Date:-2022-06-18 12:56:19
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
How many factors data rate limit depends on
1.one
2.two
3.four
4.three
Posted Date:-2022-06-18 13:26:47
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.can’t be determined with the information given
Posted Date:-2022-06-18 13:29:08
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
We send a voice signal from a microphone to a recorder, the transmission is
1.Base band transmission
2.Broad band transmission
3.both a and b
4.None of the above
Posted Date:-2022-06-18 11:06:49
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