Questions with Answers on Fundamentals of Communication System & Types of signals

Questions with Answers on Fundamentals of Communication System

Explain the Communication Links.
What are the Communication System Formats?
Define Character Codes and Digital Data Rate.

Explain Asynchronous and Synchronous Data. 
Explain the Basic Terminology including Data Rate, Bandwidth, and error rate.

What is the difference between Serial and parallel transmission?
What are the Standard packet formats – HDLC and SDLC?

Questions with Answers on Types of signals

Write short notes on AM, FM, PM, PCM, PDM, TDMA, FDMA, SDMA, CDMA, ASK, FSK and PSK Explain the Features of signals. What are the Errors we find in signals?