I applied online by submitting a standard resume and cover letter. Bain & Co. then came to my school to interview the top applicants. The first round interview consisted of two thirty minute interviews, each of which consisted primarily of a case study discussion (about 20 minutes) with some limited introductions (about five minutes) and closing questions (about five minutes). The case studies weren't overly difficult, but communication and articulation were key. The interviewers were generally nice but sometimes testing (as they should be; however, this sometimes led to seeming unhelpful if you felt you needed more information to properly address the study). There was a second round of call-back interviews the following day.