I believe most firms are quite traditional in their application and interview process. Mine conducted an interview and then let me tour the office and meet some of the staff.
Because there exists such a high turnover rate in this industry, most brokerages will probably be hiring around your area all the time.
I would suggest you sign with brokerage that has the most hand holding for new agents. Starting as a new agent is quite a daunting task. There is so much stuff you need: marketing, cameras, business cards, knowledge on the different contracts involved, knowledge of the entire process, etc.
A company that makes sure it's agents can hit the ground running (as long as they put in the work) is one that you want.
Trying doing a google search like top real estate firms in xxxx to find best firms. I am sure if that will provide real numbers, but it should put you in the right direction. If you ask your interviewer for these stats, they will more than likely give you the hard numbers.