bytearray() — Python Technical Interview Questions & Answers

bytearray()

bytearray()

  • bytearray() is built into Python. You do not import it. Freshers only need one honest call and the printed result — not a long definition.
  • bytearray() — output: bytearray(b'Ji'). Mutable bytes.
  • Wrong type often raises TypeError. Empty values matter for bool/all/any. Don’t mix bytearray up with a similar name (sorted vs sort, int vs float).

Technical Interview Tip: Call bytearray() once and say what prints.

Code Examples for bytearray()

Example

# bytearray()
b = bytearray(b"Hi")
b[0] = 74
print(b)

bytearray() — output: bytearray(b'Ji'). Mutable bytes.

How to Explain bytearray() to an Interviewer

Explain bytearray() as if you are teaching a junior — definition, then one tiny script.

bytearray() is built-in — no import. One call + exact output.

What does the example print, and why?

bytearray() — output: bytearray(b'Ji')

What mistake do freshers make with bytearray()?

Wrong type → TypeError.