How many characters per second (7 bits + 1 parity) can be transmitted over a…
2014
How many characters per second (7 bits + 1 parity) can be transmitted over a 3200 bps line if the transfer is asynchronous ? (Assuming 1 start bit and 1 stop bit)
- A.
300
- B.
320
- C.
360
- D.
400
Attempted by 351 students.
Show answer & explanation
Correct answer: B
Answer: 320 characters per second
Reasoning:
Asynchronous framing adds 1 start bit and 1 stop bit to each character.
Total bits per character = 7 data bits + 1 parity bit + 1 start bit + 1 stop bit = 10 bits.
Characters per second = line bit rate ÷ bits per character = 3200 ÷ 10 = 320 characters per second.
Note: A value like 400 would correspond to 8 bits per character (no parity or start/stop bits), which does not apply to asynchronous transfer with parity and framing.