Passport Interview questions

I am going on a passport interview

I have two concerns I dont have any bank accounts or credit cards and I am not registered on Electroal Register

It shouldn't be a concern. It would be if you are able to give them bank or credit card details when you actually don't have any as it's clearly dishonesty :D So relax. They will ask you questions which you and only you know the answers. That's how they validate the applicant's identity.

Its purely and identity interview so relax, you should pass all the questions as they relate to you and you alone.