No, you would only have to specify/rank as many choices as you want your vote to carry over. If you only like 5 candidates and hate the other 15, your vote will

No, you would only have to specify/rank as many choices as you want your vote to carry over. If you only like 5 candidates and hate the other 15, your vote will simply be thrown away and not counted if you don't specify any of the other candidates.