I applied through an employee referral. The process took 3 weeks. I interviewed at Capital One (McLean, VA) in Nov 2018
Interview
I arrived on site and they gave a tour of the building and I ate lunch in a group of about 15 applicants and 4 employees. I then have three interviews. A behavioral, job fit (technical), and case interview.
Interview questions [1]
Question 1
Tell me about a time where you taught a technical concept to a person with little or no knowledge of the field.
Interviewed for an engineer position, the interview was a joke. Asked basic OOP question with a few follow ups - no system design portion. Interviewer was very laid back and chill, didn't take it to seriously.
Was not too difficult. three total interviews all on the same day back to back. technical one, behavioral one and a case which was more of just a debugging question
Expecting a challenging experience, I found the interview at Capital One to be intense, particularly during the system design section. The question on designing a rate limiter with a token bucket algorithm took me by surprise; mid-way through the problem, I realized it was very similar to a drill I’d practiced on prachub.com just days earlier. The technical rounds included several DSA questions, and the interviewers were thorough but supportive. Ultimately, I received an offer and happily accepted, feeling well-prepared despite the pressure.
Interview questions [1]
Question 1
Design a rate limiter using a token bucket algorithm and discuss how it would handle bursty traffic and distributed deployments.