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For a binary code, the maximum number of possible sequence made up of L branch words is

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For a binary code, the maximum number of possible sequence made up of L branch words is

(a) L2

(b) 2L

(c) 2L

(d) L/2

I had been asked this question in an interview for internship.

Enquiry is from Convolution Encoding and Decoding in division Channel Coding of Digital Communications

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Right option is (b) 2L

Easiest explanation: In a binary code, all possible different code word sequences that can be made up of L branch words are 2L.

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