Data Communication and Networking – Digital to Digital Encoding Methods – Unipolar / Bipolar / Polar MCQs

1. In _______ encoding one amplitude represents a 1 bit and zero amplitude represents a 0 bit (or vice versa).

2. In _______ encoding positive and negative amplitudes represent the bits

3. In _______ encoding positive, negative, and zero amplitudes represent the bits

4. A digital signal has its 0 bits represented by 0 volts and its 1 bit represented by 5 volts. This is _______ encoding.

5. A digital signal has its 0 bits represented by 0 volts and its 1 bit represented by -5 volts or 5 volts. This is _______ encoding

6. A digital signal has its 0 bits represented by -5 volts and its 1 bit represented by 5. This is _______ encoding

7. The DC component is a serious problem for _______ encoding

8. Unipolar encoding has a DC component because the average _______ of the signal is nonzero

9. NRZ-L is a _______ encoding method.

10. NRZ-I is a _______ encoding method.

11. RZ is a _______ encoding method.

12. Manchester encoding is a _______ encoding method

13. Differential Manchester encoding is a _______ encoding method.

14. AMI is a _______ encoding method

15. B8ZS is a _______ encoding method.

16. HDB3 is a _______ encoding method.

17. _______ encoding is superior to _______ encoding because the problem of the DC component is alleviated

18. Ethernet LANs use _______ encoding

19. Token Ring LANs use _______ encoding

20. In _______ encoding the transition between a positive and a negative voltage represents a 1 bit

21. In _______ encoding halfway through each bit interval, the signal returns to zero.

22. RZ encoding requires _______ signal change(s) to encode one bit.

23. Manchester and differential Manchester encoding are both types of _______ encoding

24. Which of the following is not a type of bipolar encoding?

25. The DC component problem is handled in AMI through _______

26. The DC component problem is handled in pseudoternary AMI through _______

27. The synchronization problem for long streams of 1s is handled in AMI through _______.

28. AMI is an acronym for _______.

29. _______ is a variation of AMI.

30. _______ is an attempt to synchronize long strings of 0s

31. In _______ encoding, anytime there are eight or more consecutive 0 bits, violations are deliberately introduced

32. In _______ encoding, anytime there are four or more consecutive 0 bits, violations are deliberately introduced

33. _______ encoding is used in North America to provide synchronization of strings of 0s.

34. _______ encoding is used in Europe and Japan to provide synchronization of strings of 0s

35. In B8ZS encoding, a string of eight consecutive 0s produces _______

36. In HDB3 encoding, a string of four consecutive 0s produces _______.