📝 Quadrature Amplitude Modulation during Analog Transmission

📖 From Data Communication & Networks • 5. Analog Transmission • 12 questions available

Practice MCQs for Quadrature Amplitude Modulation during Analog Transmission. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-31

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📝 Sample Questions

Q1. What does QAM stand for?

🔹 A. Quadrature Amplitude Modulation

🔹 B. Quick Access Memory

🔹 C. Quantum Angular Momentum

🔹 D. Quasi Analog Modulator

💡 Difficulty: easy | ✅ Correct: A

Q2. Compare the spectral efficiency of 64‑QAM and 64‑PSK when both use the same symbol rate. Which statement is accurate?

🔹 A. 64‑QAM and 64‑PSK have identical spectral efficiency

🔹 B. 64‑PSK is more spectrally efficient than 64‑QAM

🔹 C. Both have lower efficiency than BPSK

🔹 D. 64‑QAM is more spectrally efficient because it carries more bits per symbol

💡 Difficulty: medium | ✅ Correct: D

Q3. How does Gray coding affect the bit error rate (BER) of a 16‑QAM system compared to a non‑Gray coded mapping, assuming the same minimum distance?

🔹 A. It reduces the BER because most symbol errors cause only one bit error

🔹 B. It increases the BER due to more complex decoding

🔹 C. It has no impact on BER

🔹 D. It only changes the bandwidth, not BER

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 Aspects of Digital to Analog Conversion during Analog Transmission 📝 Amplitude Shift Keying during Analog Transmission 📝 Frequency Shift Keying during Analog Transmission 📝 Phase Shift Keying during Analog Transmission 📝 Amplitude Modulation(AM) during Analog to Analog conversion

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