find(substring ,beginIndex, endIndex) — Python Technical Interview Questions & Answers

find(substring ,beginIndex, endIndex)

find(substring ,beginIndex, endIndex)

  • find is a string helper. You call it on text like "Asha" or "banana". It gives a new string (or a number/True-False). The old string does not change unless you assign the result back.
  • find(substring ,beginIndex, endIndex) — output: 1 then -1. Missing → -1, not error.
  • Fresher trap: writing s.find() and expecting s to update. Strings are immutable. Write s = s.find(...) if you need the new value (when it returns a string).

Technical Interview Tip: Call find on one real word and say what prints.

Code Examples for find(substring ,beginIndex, endIndex)

Example

# find(substring ,beginIndex, endIndex)
print("Asha".find("s"))
print("Asha".find("z"))

find(substring ,beginIndex, endIndex) — output: 1 then -1. Missing → -1, not error.

How to Explain find(substring ,beginIndex, endIndex) to an Interviewer

Explain find(substring ,beginIndex, endIndex) as if you are teaching a junior — definition, then one tiny script.

find works on str. find usually returns a new string.

What does the example print, and why?

find(substring ,beginIndex, endIndex) — output: 1 then -1

What mistake do freshers make with find(substring ,beginIndex, endIndex)?

find does not change the original string in place.