I have a Security Job interview whats the best way to convince them to employ

[Carl S]

you with confidendent questions? With what questions to the interviewer to impress them ?

[flingebunt]

Well in reality you won't have too much of an opportunity to ask questions.

What you should do is have a list of all the information that the employer should know about you or give you.

When they ask for questions, check your list. You can say, well it looks like you have already answered all my questions. If you not can ask a question or volunteer some additional information about yourself to help them decide on you.

It makes you look organised, prepared and it can give you a sense of confidence. By the way, use a nice neat folder, not a piece of paper in your pocket.

Also copies of all your other documents in that folder, so they are on hand.

For example, I have copies of qualifications, my resume, reference list (I usually don't include it when I send in my resume because some companies ring your referees before they interview you, or if you don't like the company, you don't want them ringing anyone).

[How Bizzare]

With confident questions? No way. You can try confident answers, that may work.
However, judging by the quality of your question, I would recommend the "less is more" approach. In other words, answer the questions but say as little as possible. Short and sharp. Good luck.