sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What is the most interesting job you have ever done?
 sentence 2: What is the best job ever? sentence 1: Which is the best movie scene in the entire history of cinema ?
 sentence 2: What are the best scenes in movie history?
not same meaning
not same meaning
same meaning