Solution

Key Points

• Non-Return to Zero (NRZ): ✅ NRZ is a data encoding scheme where binary data is represented using two distinct voltage levels. It is a widely used encoding method.
• Manchester Encoding: ✅ This is another example of a data encoding scheme. In Manchester Encoding, the data is encoded using voltage transitions to represent binary 0s and 1s.
• Amplitude Modulation (AM): ❌ Amplitude Modulation is not a data encoding scheme but rather a modulation technique used for transmitting signals over a carrier wave.
• Hamming Code: ❌ Hamming Code is a method used for error detection and correction, not for encoding data for transmission.
• Bipolar AMI: ✅ Bipolar Alternate Mark Inversion (AMI) is a data encoding scheme where binary 0 is represented by no voltage, and binary 1 alternates between positive and negative voltages.

Correct Answer

From the above analysis, the correct options that represent data encoding schemes are:

• A. Non-Return to Zero (NRZ)
• B. Manchester Encoding
• E. Bipolar AMI

Hence, the correct answer is: Option 4) A, B, and E Only