like

  1. Is he like his father?
  2. Does he resemble his father?
    Do both mean same?
  3. Like whom is he?
  4. Is he looking like whom?
    Are these questions correct?

1 and 2 usually mean the same, though sometimes ‘like’ can mean in habit, characteristic, etc. whereas 'resemble; tends to ask about physical attributes.

3 and 4 are incorrect.
Who is he like?
Who does he look like?
He looks like who(m)?