Which of the following are examples of data encoding schemes? A. Non-Return to…
2025
Which of the following are examples of data encoding schemes?
A. Non-Return to Zero (NRZ)
B. Manchester Encoding
C. Amplitude Modulation
D. Hamming code
E. Bipolar AMI
Choose the correct answer from the options given below:
- A.
A, C and D Only
- B.
A, B and D Only
- C.
C, D and E Only
- D.
A, B and E Only
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Correct answer: D
Answer: A, B and E (Non-Return to Zero, Manchester Encoding, Bipolar AMI)
Key idea:
Data encoding (line coding) schemes map digital bits to physical signal waveforms for transmission over a medium.
Why each selected item is an encoding scheme:
Non-Return to Zero (NRZ): a line coding method that represents binary 1s and 0s by two distinct voltage levels without returning to a baseline between bits.
Manchester Encoding: a line coding technique that combines clock and data by using transitions (mid-bit) to represent bits, helping with synchronization.
Bipolar AMI (Alternate Mark Inversion): a line code where logical zeros are represented by no line signal and logical ones alternate in polarity, used to control DC component and error detection.
Why the other options are not data encoding schemes in this context:
Amplitude Modulation: this is an analog modulation method that varies a carrier's amplitude to transmit information; it is not a digital line coding scheme.
Hamming code: this is an error-detecting and -correcting code used for reliability, not a method for mapping bits onto physical signal levels.
Conclusion: The correct examples of data encoding schemes from the list are Non-Return to Zero, Manchester Encoding, and Bipolar AMI.
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