count(string,begin,end) — Python Technical Interview Questions & Answers

count(string,begin,end)

count(string,begin,end)

  • count 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.
  • count(string,begin,end) — output: 3. Letter a appears three times.
  • Fresher trap: writing s.count() and expecting s to update. Strings are immutable. Write s = s.count(...) if you need the new value (when it returns a string).

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

Code Examples for count(string,begin,end)

Example

# count(string,begin,end)
print("banana".count("a"))

count(string,begin,end) — output: 3. Letter a appears three times.

How to Explain count(string,begin,end) to an Interviewer

Explain count(string,begin,end) as if you are teaching a junior — definition, then one tiny script.

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

What does the example print, and why?

count(string,begin,end) — output: 3

What mistake do freshers make with count(string,begin,end)?

count does not change the original string in place.