Python interview questions

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1. File Owners
Python Language Public

Implement a group_by_owners function that:

  • Accepts a dictionary containing the file owner name for each file name.
  • Returns a dictionary containing a list of file names for each owner name, in any order.

For example, for dictionary {'Input.txt': 'Randy', '': 'Stan', 'Output.txt': 'Randy'} the group_by_owners function should return {'Randy': ['Input.txt', 'Output.txt'], 'Stan': ['']}.

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2. Palindrome
Python Strings Public

A palindrome is a word that reads the same backward or forward.

Write a function that checks if a given word is a palindrome. Character case should be ignored.

For example, is_palindrome("Deleveled") should return True as character case should be ignored, resulting in "deleveled", which is a palindrome since it reads the same backward and forward.

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3. Path
Python Data structures Strings Public

Write a function that provides change directory (cd) function for an abstract file system.


  • Root path is '/'.
  • Path separator is '/'.
  • Parent directory is addressable as '..'.
  • Directory names consist only of English alphabet letters (A-Z and a-z).
  • The function will not be passed any invalid paths.
  • Do not use built-in path-related functions.

For example:

path = Path('/a/b/c/d')'../x')

should display '/a/b/c/x'.

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