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Number Systems and Codes - Technical MCQs

Q1:

The number of bits used to store a BCD digit is:

A 8

B 4

C 1

D 2

ANS:B - 4

The reason is because a BCD should be able to represent all the digits (0-9).

The largest digit (9) needs for bits (1001). That's why 4 bits are needed for BCD.