Technician A says in computer language a 0 or 1 is called a bit. Technician B says in computer language a 0 or 1 is called a byte. Who is right?

Technician A is right 0 or 1 is called a bit

Explanation:

In computer language, Binary system is used in which data is shown either as 0 or 1.

A bit can hold either 0 or 1.

A byte can hold 8 bits of information.

Normally we use byte to represent computer storage.

A Kilo Byte (KB) can hold 1,024 bytes of information or 1,024*8 = 8,192 bits

A Mega Byte (MB) can hold 1,024*1,024 = 1,048,576 bytes

or 1,048,576*8 = 8,388,608 bits

Hence 0 or 1 is called a bit not byte therefore, Technician A is right!