Q.1
A transmission media can have signal impairment because of
  • Noise
  • Attenuation
  • distortion
  • All of the above
Q.2
If the bit rate for an FSK signal isbps, the baud rate is ________.
  • 300
  • 400
  • 600
  • 1200
Q.3
A sine wave is defined by
  • amplitude
  • frequency
  • Phase
  • All of the above
Q.4
________ uses two carriers, one in-phase and the other quadrature.
  • ASK
  • PSK
  • FSK
  • QAM
Q.5
Block coding can help in _______ at the receiver.
  • Synchronization
  • Error detection
  • Attenuation
  • both (a) and (b)
Q.6
If the frequency spectrum of a signal has a bandwidth ofHz with the highest frequency atHz, what should be the sampling rate, according to the Nyquist theorem?
  • 200 samples/s
  • 500 samples/s
  • 1000 samples/s
  • 1200 samples/s
Q.7
PCM is an example of _______ conversion.
  • digital-to-digital
  • digital-to-analog
  • analog-to-analog
  • analog-to-digital
Q.8
The completion of one full pattern is called a
  • period
  • Cycle
  • Frame
  • None of these
Q.9
MAC address is also known as __________.
  • Hardware address
  • Physical address
  • IP address
  • both and b above
Q.10
The power in our house can be represented by
  • sine wave with a peak amplitude
  • sine wave with amplitude
  • sine wave with phase
  • All of above
Q.11
If the bandwidth of a signal is 5 KHz and the lowest frequency isKHz, what is the highest frequency?
  • 5 KHz
  • 10 KHz
  • 47 KHz
  • 57 KHz
Q.12
This kind of data transmission allows data to be transmitted in both directions on a signal carrier at the same time.
  • full-duplex
  • duplex
  • half-duplex
  • None of these
Q.13
In decoding a digital signal, the receiver calculates a running average of the received signal power, called the _______.
  • baseline
  • base
  • line
  • Both A & B
Q.14
A signal is measured at two different points. The power is P1 at the first point and P2 at the second point. The dB isThis means ________.
  • P2 is zero
  • P2 equals P1
  • P2 is much larger than P1
  • None of these
Q.15
Repeaters are often used on an 802.3 network to help strengthen the signals being transmitted. As with the length of segments and the number of segments, a limit exists as to how many repeaters can be used between any two nodes. What is the maximum number of repeaters that can be used?
  • 1
  • 4
  • 9
  • 6
Q.16
A device is sending out data at the rate ofbps. How long does it take to send a file of 100,characters?
  • 200s
  • 400s
  • 600s
  • 800s
Q.17
We need to sendkbps over a noiseless channel with a bandwidth ofkHz. How many signal levels do we need?
  • 1024
  • 512
  • 256
  • 128
Q.18
One Picoseconds (PS) is equivalent to
  • 10-3 s
  • 10-6 s
  • 10-9 s
  • 10-12 s
Q.19
How many factors data rate limit depends on
  • One
  • two
  • four
  • three
Q.20
Data to be transmitted must be transformed into
  • Electronic signal
  • Magnetic pulses
  • Radiations
  • Electromagnetic signals
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