Python Built-in Functions — Python Technical Interview Questions & Answers

Python Built-in Functions

Python Built-in Functions

  • Built-in functions ship with Python. You call them without import: print, len, type, range, sum, min, max, sorted, enumerate, zip, input, int, str, list. They keep small scripts consistent. len(names) is the size. names.count("Asha") is how many times Asha appears — different job. Mixing len and count is a classic MCQ fail.
  • Name eight you actually use. Don’t recite fifty. input() always returns text — wrap with int() if you need a number. sorted(a) returns a new list; a.sort() is a list method, not a built-in that returns the list.
  • Python Built-in Functions — output: 3 60 30. Three builtins on one list.
  def square(n):
      return n * n
         │ square(5)
         ▼
        25

Technical Interview Tip: len vs count — size vs how many times.

Code Examples for Python Built-in Functions

Example

# Built-in functions
nums = [10, 20, 30]
print(len(nums), sum(nums), max(nums))

Python Built-in Functions — output: 3 60 30. Three builtins on one list.

How to Explain Python Built-in Functions to an Interviewer

Explain Built-in Functions as if you are teaching a junior — definition, then one tiny script.

No import. print len type range. input() returns str.

What does the example print, and why?

Python Built-in Functions — output: 3 60 30

What mistake do freshers make with Built-in Functions?

len vs count. sorted vs sort.