it is a friendly interview. The employer on the freelancer site preferred to interview you as a friend. They don't want you to use ma'am/sir to them. The hourly rate depends on our negotiation and you can have a flexible time in freelancing business

We can’t read minds, unfortunately, but we’ll give you the next best thing: a list of 64 of the most commonly asked interview questions and answers, along with advice on how to come up with your own responses. While we don’t recommend having a canned response for every interview question (in fact, please don’t), we do recommend spending some time getting comfortable with what you might be asked, what hiring managers are really looking for in your responses, and what it takes to show that you’re the right person for the job.