I've been on the hiring committee at my job and our final question really reveals a lot about a candidate:
"We're interviewing a number of candidates for this position. Why should we hire you?"
And, have an answer ready. It doesn't have to be memorized word for word from a script, but it always sounds really badly when the candidate fumbles and can't explain WHY they're the BEST. I mean, if they can't figure it out then why should we waste our time and resources, investing in someone who isn't so sure? This is the final sell so make it good!
Other tips:
-Answer completely but succinctly. I frequently begin to tune out when the candidate keeps going on and on and on and on, answering the question and then adding everything else under the sun. It's a job interview, not a doctoral dissertation! We've had people answer the question "Tell me a little about yourself" and take 10 minutes! Holy cow! (And by the way, tell me a little about yourself is a great way to brag about your skills and start painting a picture that shows you're the right one for the job)
-Use stories and examples to paint a picture for your interviewer. I think 'MA' is medical assistant, right? If they ask the age-old question what do you perceive as your biggest strength, don't just say _____; as an example, start by saying "I think one of my greatest strengths is compassion for others. When I was doing my clinical rotations, I really enjoyed working with people and listening to their stories, really getting to know them as individuals and not just their 'problem'." And if you have a specific story, even better! It's another shot to 'sell' yourself and your skills - they can literally imagine you doing the job!
-And...if they ask what do you perceive to be your biggest weakness, be honest but don't tell them a big ole deal breaker one! Obviously tell them but also explain to them how you are managing to work on that weakness, again using specific examples. "One of my biggest weaknesses is working with blood, but since I know it is a major part of the job that I will be doing, I made sure to get a lot of experience in blood draws, wound care, etc. so I would become more used to it."
-Maintain eye contact. If it freaks you out (sometimes it freaks me out lol), then look at their forehead or eyebrows. It still looks like you're looking at them.
Good luck to you - walk in there like you know that you are the BEST candidate for the job and exude that sort of confidence!