I applied through an employee referral. I interviewed at Capital One
Interview
The first round was an on-campus behavioral interview which consisted of four questions. After the first round was the final on-site interview which included a behavioral, case, and job-fit (technical) interview one hour each.
The interviews were not too stressful and they asked very simple questions for the technical interview. I'm not entirely sure what they're looking for in a candidate since there's no way that their technical interview can screen out a lot of people. I had no idea if I made a mistake on the technical, case, or behavioral interviews, but it was probably behavioral since that's pretty subjective (if you fit the culture or if they want to work with you).
From the on-site interview to the tour it was pretty obvious that Capital One takes care of their employees; they give you snacks and a one hour break randomly scheduled in your onsite interviews.
Interview questions [1]
Question 1
Given a string, return the first NON-repeating character that occurs in the string.
EX: "adzbdcab" returns 'z'.
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.