If I didn't know ahead of time that Fizzbuzz is to weed out people who pretty much don't know how to program at all I could actually fail it on an interview. It would go something like this.

They would ask me to write Fizzbuzz. I'd see how simple the problem is and immediately think of something like this (assuming they want it in Python):

  def fb(n):
    for i in range(1,n+1):
      if i%15 == 0: print("fizzbuzz")  
      elif i%3 == 0: print("fizz")  
      elif i%5 == 0: print("buzz")
      else: print(i)

  fb(100)

But then I'd think that this is too simple. That's something you could write just after glancing through a Python book at a bookstore. Surely I should use more language features to try to stand out among the candidates, right?

So I'd probably end up trying something like this:

  def fizzbuzz(n, *args):
    cur = ['' for x in range(1,n+1)]
    for m, postfix in args:
      cur = [y+postfix if x%m==0 else y for x, y in zip(range(1,n+1), cur)]
    cur = [str(x) if y == '' else y for x, y in zip(range(1,n+1), cur)]
    return cur

  print("\n".join(fizzbuzz(100, (3, 'fizz'), (5, 'buzz'))))

But Python isn't my main language and if this was a whiteboard problem I'd probably make some mistakes and they would be very unimpressed.