I would say that working hard all the time loll.
What Does It Mean When You Say What Are Your Strengths?
Like your always on time it basically means what are your good qualities some other ex. You are a good people person or you are a hard worker that type if stuff hope this helps :)
You have some innate qualities which make your personality. Generally when you are asked this question you need to highlight your strengths which are suited to the position and the company in question. If the job requires good communication, you can emphasise your communication skills or the job requires selling or marketing, you can harp on your persuasive skills.
It means he is asking that how much confident you are. And how much you know about your self.