In real job interviews this is similar to the question - where do you see yourself in 5 years? It's great if you have a firm idea. But it is also fine if you don't, just be sure to mention options or themes eg "I'm not 100% sure, but I know I work well in groups and want to help people, so maybe something in healthcare?"

1) We know lots of grown-ups with different jobs. Which do you like?

2) Who do you want to be like when you grow up?

3) What would make you happy at work (eg helping people, making something, travelling somewhere etc?)

A good chance to show your human side, and that you are not just an academic and exam machine! It helps to talk about varied interests. Be specific and use examples eg "I like swimming - I did a 100m swim for charity last week where I raised $100 for the poor"

1) Let's think about last weekend. What did you do?

2) Why do you like doing that?

3) What do you like that is a bit different to others?

An honest answer is fine - if you like Art but not Maths that is OK. But then demonstrate some self-awareness that for instance - "I know Maths is quite important, so I still work hard at that" or "Probably my favourites will change as I grow up, so I am trying to keep an open mind". In real life job interviews this is similar to what are your strengths / weaknesses question.

1) I didn't like Maths growing up! What about you?

2) What do you try hardest in and why?

3) How will your favourite subjects change as you grow up?