[Solved] What will be the output of this code snippet if the serial device sends the bytes b'OK'?... What will be the output of this code snippet if the serial device sends the bytes b'OK'? | Raspberry Pi

Raspberry Pi - Serial UART Communication

What will be the output of this code snippet if the serial device sends the bytes b'OK'?

import serial
ser = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)
response = ser.read(2)
print(response)
ser.close()

Ab'OK'

B'OK'

COK

Db"\x00\x00"

Step-by-Step Solution

Solution:

Step 1: Understand ser.read(2) behavior
The read(2) method reads 2 bytes from the serial port and returns them as a bytes object.
Step 2: Interpret the print output
Printing a bytes object shows it with a leading b and quotes, so b'OK' will be printed.
Final Answer:
b'OK' -> Option A
Quick Check:
ser.read() returns bytes, printed as b'...' [OK]

Quick Trick: ser.read() returns bytes, print shows b'...' [OK]

Common Mistakes:

MISTAKES

Master "Serial UART Communication" in Raspberry Pi

9 interactive learning modes - each teaches the same concept differently

More Raspberry Pi Quizzes

What will be the output of this code snippet if the serial device sends the bytes b'OK'?