iter() — Python Technical Interview Questions & Answers

iter()

iter()

  • iter() is built into Python. You do not import it. Freshers only need one honest call and the printed result — not a long definition.
  • iter() — output: 10 then 20. iter + next walk one by one.
  • Wrong type often raises TypeError. Empty values matter for bool/all/any. Don’t mix iter up with a similar name (sorted vs sort, int vs float).

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

Code Examples for iter()

Example

# iter()
it = iter([10, 20])
print(next(it))
print(next(it))

iter() — output: 10 then 20. iter + next walk one by one.

How to Explain iter() to an Interviewer

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

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

What does the example print, and why?

iter() — output: 10 then 20

What mistake do freshers make with iter()?

Wrong type → TypeError.