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Quiz 1
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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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