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

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

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

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

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

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

Example

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

rindex(str,beg=0,end=len(str)) — output: 5. Last a. Missing → ValueError.

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

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

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

What does the example print, and why?

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

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

rindex does not change the original string in place.