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Capital One Interview Experiences
3935 interview stories from candidates at 857 companies: how each round went, what was asked and how it ended. Every company page links to practice questions in the same style.
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62 results
- Power Day With Three Back-to-Back Case StudiesCapital One · Data Scientist · Onsite · Apr 2026
Mini Case About streaming subscriptions: a new streaming service is launching, calculate the break-even point. Asked whether the break-even user count I calculated was reasonable — if not, what could be done to make it happen. Power Day Case #1 was the original weather insurance case Asked what factors to consider when it comes to the target customer Premium prepaid for 12 months: $30/month. Serv…
- System Design Prep With No Cloud BackgroundCapital One · Software Engineer · Senior+ · Other · Apr 2026Offer
Heading into this loop I honestly wasn't sure I'd make it through. I figured I could be a borderline candidate at best, and part of me expected to flop outright. The reason was simple: I've never really worked hands-on with cloud. My general software engineering background carries over, but it isn't the same, and I feared that unfamiliar terminology would trip me up or that I'd come across like s…
- A Four-Round Power Day OnsiteCapital One · Data Scientist · Onsite · Mar 2026
Timeline & Full Process Online application / referral -> Recruiter Screen (15-20 min) -> OA (Assessment): you can check other posts on the forum for what this looks like -> Power Day: four rounds back to back, 45-60 minutes each. Power Day Breakdown Round 1: Case Interview (Business Analyst Case) Scenario: you're given a concrete credit business scenario (for example, a credit-limit-increase stra…
- A Full OA Question Bank (Oct 2025–Jan 2026)Capital One · Software Engineer · Online Assessment · Feb 2026
Given a target and an array, count how many elements are greater than the target and how many are less than it. If there are more greater elements, return greater; if there are more smaller elements, return smaller; if they're equal, return tie. Given an initial state, a season, and a day, return the moon state for that specific date. The moon's cycle is 8 days with 8 possible states, and the ini…
- A Tetris-Style Grid Placement OA QuestionCapital One · Software Engineer · Senior+ · Online Assessment · Feb 2026
There's an n x m grid of squares, and I need to draw a pattern on it. The pattern is made up of several fixed block shapes, kind of like Tetris. The problem gave 5 figure types: A, B, C, D, E. For A: in a 2x2 square, it only occupies the top-left, top-right, and bottom-left cells. So A is: That is, a U-shape / concave shape with the top-middle cell empty. This should go by the example matrix — fo…
- Manager Round Ran Long After a Slow OACapital One · Machine Learning Engineer · Online Assessment · Feb 2026
This company is really annoying about it — you have to grind through an obnoxiously long OA before they'll even schedule the hiring manager interview. After I finished the OA, I actually had to remind the recruiter myself before they moved things forward. Let me talk about the manager interview. It was basically pure conversation. The manager seemed like a nice guy. He mostly asked what I'm curre…
- A Groupon Break-Even Case, Fast-Tracked to the Next RoundCapital One · Data Analyst · Technical Screen · Jan 2026In progress
I just interviewed for the C1 SBA minicase yesterday, and it was the exact same Groupon case that's been floating around! If you're running a restaurant, you're considering whether to partner with a platform like Groupon. 1) What factors would you consider? 2) Given data: number of tables served per day: 20; avg spend/day: $30; cost: $0.40 per dollar spent; FC: $100/day — what is the daily profit…
- A Streaming Renewal Case I Didn't PassCapital One · Data Scientist · Technical Screen · Jan 2026Rejected
I interviewed for a mini case at Capital One (C1) a while back and didn't pass. Today I want to share the questions and do a bit of a retro. The interviewer was a guy who used to work in consulting (I get the feeling C1 has a real preference for consulting backgrounds). He started with a quick self-intro, then had me introduce myself. He mentioned the official time allotted for this case is one h…
- HR Call Through a Full Power DayCapital One · Data Scientist · Onsite · Jan 2026
Round 1: HR Call Asked about "why this company," and otherwise it was just some basic logistics confirmation. Round 2: Data Challenge This was done on CodeSignal — about 4 questions total, using numpy, pandas, sklearn, etc. It was split into a few parts: data cleaning, feature selection, and model building. Finishing the data-processing part within the time limit (90 min) was fairly difficult; yo…
- Four Rounds Including a Virtual Credit Card Case StudyCapital One · Machine Learning Engineer · Onsite · Dec 2025In progress
There aren't many MLE interview reports for Capital One on the forum, so I'm writing up my own experience to give everyone a reference point. I'll try to be as specific as possible, hoping it helps other people interviewing for MLE later. There were 4 interviews total, each scheduled for 1 hour, as follows: Set A technical. The interviewer was pretty easygoing, and overall it went smoothly and pl…
- A 14-Question Excel and SQL Online AssessmentCapital One · Data Scientist · Online Assessment · Oct 2025
The exam had 14 quiz questions total, with one big SQL question in the middle. The content was almost exactly like what people have shared here in past years — really grateful for those write-ups, they were super helpful for prep! Questions 1-7: you download a CSV file. The one I got was about an online ad platform — A/B testing, watch time, dates, that kind of thing. The HR email had actually me…
- A 70-Minute OA With 14 Excel and SQL QuestionsCapital One · Data Scientist · Online Assessment · Oct 2025In progress
Timeline: applied mid-April, got the OA invite in early May. Duration: 70 minutes. Content: 14 questions total, with a big SQL question in the middle. The content matched what people have shared here in past years almost exactly — really grateful to everyone who shared before me, it was super useful for prepping! Questions 1-7: you download a csv file. The one I got was about an online ad platfor…
- A 70-Minute, 15-Question OA With Excel, SQL, and StatsCapital One · Data Analyst · Senior+ · Online Assessment · Oct 2025In progress
Capital One Senior DA Submitted my application on the 9th and got the OA the next morning on the 10th. Then my procrastination kicked in at full strength and I put it off all the way until today, emmmmm. Overall the difficulty wasn't too high, just like people here have said. It's split into three parts, 15 questions, 70 minutes. You get your score right when you finish, and it logs how long you…
- A Case Round That Was All Numbers, No StrategyCapital One · Business Analyst · Senior+ · Other · Oct 2025In progress
Capital One Senior Business Analyst When I was prepping for this interview and came looking for interview reports, all I could find were ones for data analyst roles, so I told myself that once I finished mine, I'd write one up to help other people interviewing for business analyst positions. Let me introduce my background first (though probably nobody's interested) — I have a Business Analytics m…
- A Cloud Pricing Case with Break-Even MathCapital One · Data Scientist · Technical Screen · Oct 2025
A minicase about a cloud service — not sure if it's a new one, I don't remember seeing it on the forum before. The setup was a startup doing cloud services. We supposedly had our own advantage (I didn't quite catch what the advantage actually was, but personally I don't think it affected the rest of the questions much). Q1: How would you structure the product offering? How would you generate prof…
- A Full-Day Power Day Onsite Ending in an OfferCapital One · Quantitative Analyst · Onsite · Oct 2025Offer
I've read a lot of interview reports on the forums and gotten a lot out of them, so let me quickly share mine. The position I interviewed for was Quantitative Analyst. HR just asked about my visa status and then scheduled an HM phone interview. The HM interview was on Zoom. At first I thought there'd be some technical or resume questions, but it ended up being basically all BQ. A lot of it was ab…
- A Grocery Loyalty Case With a Database-Outage TwistCapital One · Data Scientist · Technical Screen · Oct 2025
I finished my interview in the afternoon and got notified the next day that I'd passed. But my next round wasn't a PD round — it was another case interview instead. I don't know if any of the intern applicants here can confirm whether this is the standard process for everyone. For the mini case, the interviewer introduced themselves and then we got started. It was the grocery loyalty membership c…
- A Smooth Power Day of Case, BQ, Case, and DCCapital One · Data Scientist · Onsite · Oct 2025In progress
I interviewed for C1's power day this week. Coming back to give back to the forum with my interview experience. I was nervous going in because I hadn't finished prepping in time, but the whole process turned out to be pretty smooth and not that hard. My power day order was case-bq-case-dc. Round 1, case: a coding-style one, I'd already come across this one before so no real questions there. Round…
- Data Challenge, Power Day, Offer in 3 DaysCapital One · Data Scientist · Onsite · Oct 2025Offer
Reading interview reports here helped me a lot, so I'm giving back with my own timeline and report. Got an HR call at the end of February, and scheduled an HM call for a week later. The hiring manager was great — she mostly shared her own experience and what the team does, then went through my resume in detail. After the HM call in early March, I got a Data Challenge. Very classic problem, overal…
- OA, Data Challenge, and a Four-Round Power DayCapital One · Data Scientist · Onsite · Oct 2025Offer
At the end of July, a friend referred me for a Capital One SDA position. Then nothing for about a month. 9/5: The recruiter emailed with the OA, valid for one week. The OA wasn't hard but the time was tight — 70 minutes for 15 questions, 14 multiple choice and 1 SQL. The first seven questions used one CSV, the eighth was the SQL question, and the last seven used four more CSVs where you had to me…
- Passed Power Day, Now Waiting on Team MatchingCapital One · Data Scientist · Onsite · Oct 2025In progress
This Friday I just finished my Power Day. In the afternoon I got the email saying I didn't need another round, and not long after that the recruiter called that same afternoon to tell me I passed. But since it was Friday, HR usually doesn't get back right away, so they told me they'd first show my results to the HR they're currently working with to see if anyone wants to pick me up, and if not, t…
- Take-Home Challenge, Then a Four-Round PowerDay and an Offer in Under 50 MinutesCapital One · Data Scientist · Onsite · Oct 2025Offer
Yesterday morning was PowerDay, 9:00am-12:30pm Eastern Time. I'm in Vancouver, so I dragged myself out of bed at 5:20am for the interview. Luckily it went well — less than 50 minutes after the interview ended I got an email from the recruiter with an offer writeup, and now the next step is team matching. I've been sending out résumés for a year and a half and honestly it made me want to die, cons…
- The Energy One Mini Case and a Same-Day Power Day CallbackCapital One · Data Scientist · Technical Screen · Oct 2025In progress
Mini case, midday on 3/18/2025. The question was one someone had already shared here before — the Energy One case. The interviewer gave a short self-introduction, then asked about my background — worth remembering to prep for that too, I was so focused on the mini case that I answered it pretty roughly. Then we got into the actual case. There's an energy company called Energy One that wants to tr…
- the Groupon Coupon Mini-CaseCapital One · Data Scientist · Technical Screen · Oct 2025In progress
Just finished the mini case this morning, and by the afternoon I already had the pass notification along with a scheduled power day for next week — I have to say the recruiter I got this time was way better than the last one. While it's still fresh, let me report back to everyone. Hoping next week's power day goes smoothly. At the start, the interviewer briefly introduced his background, had me i…
- the Ride-Share Profitability Mini CaseCapital One · Data Scientist · Technical Screen · Oct 2025
I just finished my mini case this morning, sharing it while I still remember everything. I've gotten a lot of help here, so I wanted to give back too. Hope everyone's interviews go well. Today's interview was the exact question someone here had already shared — the original Google Doc question — and of course that was the one question I hadn't gotten around to preparing. Felt like I'd practiced p…
- Three Case Rounds, a Scheduling Mishap, and a RejectionCapital One · Data Scientist · Onsite · Oct 2025Rejected
Round 1 had two interviewers — one leading, one silent the whole time. The BQ was a standard "help others" question. They followed up with a lot of detail, including what materials or records existed for the help I gave, and what I had to sacrifice or give up something important to help someone. A handful of other detail questions too. Then came the first case. It started by bringing up the reven…
- Two Attempts, a Cancelled Headcount, and an Energy Case InterviewCapital One · Data Scientist · Technical Screen · Oct 2025In progress
My Capital One interview process has been quite a rollercoaster so far — over the past month or so I've interviewed twice. Timeline The first time was through a referral from a friend, for a newly posted analytics role: 1/16: HR Call scheduled 1/24: HR Call rescheduled to 1/31 — the reason was that when the original interview time came, I sat on my phone waiting for over half an hour, then HR fin…
- Four OA Problems Under a Tight ClockCapital One · Software Engineer · Online Assessment · Sep 2025
The first problem was to figure out how many numbers in an array are a power of some number k. Basically you check whether repeatedly dividing by k eventually gets you to 1, but you have to watch out for the special case where k=1. The second problem was about a planet's lunar calendar: given the moon phase at the start of the year, compute the moon phase on a given date. The phases cycle every 8…
- A Four-Round Power DayCapital One · Product Manager · Onsite · Jun 2025Offer
Interview timeline: 5/14 recruiter call 5/27 first round — Product Mini Case 6/4 Power Day 6/6 recruiter notified me I passed *There were two weeks between the recruiter call and the first round because the team wasn't scheduling interviews that particular week. Product Mini Case (1 hour) Mainly an interviewer-led product casing session. The recruiter told me in advance they'd pick one of three C…
- A TV-Show Cancellation Case, Then a Power Day Invite in 90 MinutesCapital One · Data Scientist · Technical Screen · Apr 2025In progress
Q1 - They asked the TV series case: assume you're the CEO of this company, and the company currently has a TV show called Analyst. When you're deciding whether to cancel this show, what factors do you need to consider? I answered from the revenue and cost angle. After I finished, the interviewer asked a follow-up, something like "do you think you need to consider the market situation?" I got what…
