There was no interview process. You, however, must meet age requirements and fitness standards. You must also pass the entrance exam, known as the ASVAB to determine which roles you qualify for.
ASVAB, you start as a Seaman Recruit, then move towards your promotion. The promotions usually happen in time. Then once you reach E3 or Seaman, wait 6 months to take the 3rd Class exam. You usually take exams 2x a year. Studying is required and there is a minimum percentile required to pass. The quotas change every exam date.
I applied online. The process took 12 months. I interviewed at US Navy in Jan 2015
Interview
Long process. Looked into much of my past. I talked to about 10 different people during the interview. There was many people fighting for the same job. Did not tell me everything that was envoled with the job.