Hey there,
Correct, the interviewers may ask whatever they find interesting in theory.
Questions to expect
In practice, most of the time the questions are the same and are along the lines of (in decreasing order of importance and relevance):
- Tell me something about yourself / can you guide me through your resume / how did you end up applying at our firm
- Why do you want to work in consulting?
- Why do you want to work for us?
- Tell me about a time you failed and what have learned from it (very common at BCG)
- What are your strengths / weaknesses?
- What was your biggest achievement?
- Tell me about a time you led a team during a difficult situation
- Tell me about a time you influenced a senior leader or group of people
- How do your skills match the job description? How can your previous experience benefit us?
- What are you enjoying outside of work? What drives you?
Timing
- For rapid-fire questions (what is one of your weaknesses?), between 30 seconds and 1 minute
- For behavioral questions (tell me about a time you led a team), prepare 2-minute answers and then be prepared to deal with some follow-up questions
Repeated answers
Other than for McKinsey and its PEI, here you can repeat your answers when dealing with rapid-fire questions. It's rather important to show consistency and not tell 2 different interviewers 2 different stories or reasons why you want to join BCG for instance.
For behavioral questions, it makes sense to have different stories available for the same question.
Cheers,
Florian