Question

In communication system, redundancy ________

(a) Helps to detect error

(b) Helps to correct error

(c) Reduces efficiency of communication

(d) Helps to detect and correct error and also reduces efficiency

I got this question by my school teacher while I was bunking the class.

My doubt is from FM Receiver topic in division Receivers & Transducers of Analog Communications

Answer 1

The correct option is (d) Helps to detect and correct error and also reduces efficiency

For explanation I would say: Redundancy helps in many ways in communication. It not only helps to detect an error but also helps in correcting it. It sometimes reduces efficiency also. It is basically the duplication or can say that it is the backup of some important components, so as to efficiently detect the code, with the intention of increasing reliability of the system.