Data Communication and Computer Network
Transmission
Q. In a _____ scheme, all the signal levels are on one side of the time axis, either above or below.
A.  polar B.  bipolar C.  unipolar D.  all of the above
Similar Questions
1. Unipolar, bipolar, and polar encoding are types of _______ encoding.
A.  line B.  block C.  NRZ D.  Manchester
2. _______ encoding has a transition at the middle of each bit.
A.  RZ B.  Manchester C.  Differential Manchester D.  All the above
3. _______ encoding has a transition at the beginning of each 0 bit.
A.  RZ B.  Manchester C.  Differential Manchester D.  All the above
4. PCM is an example of _______ conversion.
A.  digital-to-digital B.  digital-to-analog C.  analog-to-analog D.  analog-to-digital
5. If the frequency spectrum of a signal has a bandwidth of 500 Hz with the highest frequency at 600 Hz, what should be the sampling rate, according to the Nyquist theorem?
A.  200 samples/s B.  500 samples/s C.  1000 samples/s D.  1200 samples/s
6. The Nyquist theorem specifies the minimum sampling rate to be_______.
A.  equal to the lowest frequency of a signal B.  equal to the highest frequency of a signal C.  twice the bandwidth of a signal D.  twice the highest frequency of a signal
7. Which of the following encoding methods does not provide for synchronization?
A.  NRZ-L B.  RZ C.  NRZ-I D.  Manchester
8. Which encoding method uses alternating positive and negative values for 1s?
A.  NRZ-I B.  RZ C.  Manchester D.  AMI
9. Which quantization level results in a more faithful reproduction of the signal?
A.  2 B.  8 C.  16 D.  32
10. . Block coding can help in _______ at the receiver.
A.  Synchronization B.  Error detection C.  Attenuation D.  (a) and (b)
DATA COMMUNICATION AND COMPUTER NETWORK TOPICS