Simple interview question to test basic debugging & communication skills. May require a live person to answer questions (particularly if the candidate doesn't know Python). TODO: rewrite this in a few languages and put in a repo.

interview_debug.py

def foo(a, b):
	"""Please document me.
	What am I supposed to do?
	Rename anything you see fit.
	Also, I think I have bugs. Please debug me.
	"""
	bar = {}
	for x in a:
		bar[x] = True

	for y in a:
		if bar[b - x]:
			return True
		else:
			return False


def test_foo(a, b, c):
	"""
	Bonus: Thanks for debugging & documenting me.
	Please now write unit tests to make sure I behave.
	Feel free to rename anything here as well.
	"""
	# example
	# assert foo(a,b) == c
	pass