I had initial phone screen with Meta for E5 position and here are the questions asked:

• Find average of each Sliding window. Given an input array of n elements and a sliding window fo size k, find the average of each sliding window.
  input = [1,2,3,4,5]
  k = 3
  output = [2.0, 3.0, 4.0]
  (1+2+3)/ 3 = 2.0
  (2+3+4)/3 = 3.0
  (3+4+5)/3 = 4.0

  Expectation was to solve it in O(n) time and O(1) space

• 339. Nested List Weight Sum