Does the votes of a question change if the question is edited? I have the same question about the answers.
No. Editing a post does not change the votes that are on it.
However, editing a post will bump it back to the active questions list. This will indirectly attract fresh attention from users who may end up casting votes.
Also, votes are locked after 5 minutes of placing your up or down vote. Which means you are no longer able to change or remove your vote. When a post is edited, this lock is removed and you may change or remove your vote again.