set() — Python Technical Interview Questions & Answers

set()

set()

  • set() is built into Python. You do not import it. Freshers only need one honest call and the printed result — not a long definition.
  • set() — output: {1, 2, 3}. Duplicates gone.
  • Wrong type often raises TypeError. Empty values matter for bool/all/any. Don’t mix set up with a similar name (sorted vs sort, int vs float).
  {1, 2, 2, 3}
         │ unique
         ▼
      {1, 2, 3}

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

Code Examples for set()

Example

# set()
print(set([1, 2, 2, 3]))

set() — output: {1, 2, 3}. Duplicates gone.

How to Explain set() to an Interviewer

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

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

What does the example print, and why?

set() — output: {1, 2, 3}

What mistake do freshers make with set()?

Wrong type → TypeError.