GATE CSE 2002 | Question: 1.11

Question

In serial data transmission, every byte of data is padded with a $'0'$ in the beginning and one or two $'1'$s at the end of byte because:

• A. receiver is to be synchronized for byte reception
• B. receiver recovers lost $'0'$s and $'1'$s from these padded bits
• C. padded bits are useful in parity computation
• D. none of the above

Answer 1

Answer (A) In serial communication in beginning $'0'$ is padded as start bit and one or two $'1'$s are padded as stop bit.

and those bits are for synchronize receiver

http://esd.cs.ucr.edu/labs/serial/serial.html

Comments

the stop bits can be 1 or 2

Answer 2

answer must be (D)

-bcoz reciever is to be synchronized for bit reception not for byte reception