First the OA has 4 questions (1 easy, 2 med, 1 hard) with a short time period around an hour and a half. Answering >3.25 questions is usually enough to progress.
If you pass the OA, you are invited to the Power Day which is 3 interviews (1 hour each) with an hour break. The Technical interview was an OOP/Class Design question (Leetcode Easy) and the next question was a Leetcode Medium/Hard related to Linked Lists. The Behavioral was a pretty standard interview with 3 "tell me about a time when..." questions, but be prepared to answer a TON of follow up questions. Lastly, the Case Interview was not necessarily difficult but unique involving a specific problem experienced to Capital One and it involved a lot of data analysis / coming up with an efficient approach to implement the analysis in code. I would say that the most important thing is even if you have difficulty with a certain part, to always keep communicating with your interviewer.
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.
Recruiter screening to begin with. Then, technical discussion about java, spring boot, design pattern, small coding tasks and followed by design assessment for distributed systems. Finally, managerial round for the team fit
Scheduled a call with recruiter. Recruiter didnt show up for the screening call and cancelled it 5 mins after the scheduled time. Dropped a follow up email and got no response. After a week, I got an email from the recruiter stating I am selected for the next round i.e Assessment. Sent me an email with the assessment description but no link. When I sent a follow up email asking for the link, I got ghosted again. It was a bad experience. Felt like she is toying with me. Why ghost an applicant repetitively? Unprofessional recruiter who doesn't respect an applicant's time or efforts!