How many bytes will a message take if it consists of 8 characters taken from the 16 character alphabet?

Answer: 4 bytes.
In an alphabet of 16 characters, the length of each is n from the equation 2 ^ n = 16;
n = 4 bits. Since the message consists of 8 characters, its length is 4 * 8 = 32 bits. There are 8 bits in 1 byte, so to find the final answer, you need 32/8 = 4 bytes.

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