Short-Answer Quiz

Answer the following questions in 2-3 sentences based on the provided source material.

1. What are the three fundamental parts of any communication system, and what role does each part play?
2. Define modulation and explain its primary purpose in long-distance communication.
3. What is the difference between an analog signal and a digital signal? Provide an example for each.
4. Explain what noise is in a communication system and list two of its primary effects on system performance.
5. Describe the Sampling Theorem and explain the concept of the Nyquist rate. What happens if a signal is sampled below this rate?
6. What is the Modulation Index in Amplitude Modulation, and what occurs during under-modulation and over-modulation?
7. Explain the concept of multiplexing. Differentiate between Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM).
8. What is the key difference between Frequency Modulation (FM) and Phase Modulation (PM)?
9. Describe the core principle behind Spread Spectrum Modulation and name its two main classifications.
10. What is Total Internal Reflection and how is it utilized in the core and cladding structure of an optical fiber?

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