rfind(str,beg=0,end=len(str)) — Python Technical Interview Questions & Answers

rfind(str,beg=0,end=len(str))

rfind(str,beg=0,end=len(str))

  • rfind 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.
  • rfind(str,beg=0,end=len(str)) — output: 5. Last a.
  • Fresher trap: writing s.rfind() and expecting s to update. Strings are immutable. Write s = s.rfind(...) if you need the new value (when it returns a string).

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

Code Examples for rfind(str,beg=0,end=len(str))

Example

# rfind(str,beg=0,end=len(str))
print("banana".rfind("a"))

rfind(str,beg=0,end=len(str)) — output: 5. Last a.

How to Explain rfind(str,beg=0,end=len(str)) to an Interviewer

Explain rfind(str,beg=0,end=len(str)) as if you are teaching a junior — definition, then one tiny script.

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

What does the example print, and why?

rfind(str,beg=0,end=len(str)) — output: 5

What mistake do freshers make with rfind(str,beg=0,end=len(str))?

rfind does not change the original string in place.