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Interview experiences
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Interview experiences · Capital One
Capital One AI Engineer Interview Experience — Four-Question OA, Left Q3 Blank and Tripped on the Digit-Swap Problem
Catching up on a write-up for the C1 AI Engineer OA I did a while back, which I failed. 4 questions total, 1 hour 10 minutes. The first two were really easy. I can't remember what they were, but they were just really easy, you can finish them in 10 minutes. I didn't understand question 3, so I skipped it and went to do question 4, and in the end I had no time to come back to it, so it was complet…
Interview experiences · Capital One
Capital One AI Engineer Interview Experience — New OA With Four Questions, One I Only Half-Solved
One hour and ten minutes, four questions in total. Question 1 Very simple — take a string and reorder it by first character, last character, second character, second-to-last character, and so on. Input: abcde Output: aebdc Question 2 Also simple — a string made up only of W, D, L characters. Sort the whole thing so the output repeats in W, D, L order. Input: WWWLLDDLD Output: WDLWDLWDL Input: WLD…
Interview experiences · Capital One
Capital One Applied Researcher Interview Experience — CodeSignal OA with a Tetris-Style Block-Placement Problem
A friend referred me to Capital One (C1). After the recruiter phone screen, they sent a CodeSignal Online Assessment, which had to be completed within 7-10 days — 4 questions, 70 minutes total. I got the link last Friday and finished it this Tuesday. I had grinded LeetCode and the C1-tagged questions from the last three months on 1point3acres, but only the first question actually overlapped. My f…
Interview experiences · Capital One
Capital One Business Analyst interview: clarifying a game-launch case question
The hardest part for me was a case interview where I initially struggled to understand the question. The interviewer guided me through calculating the answer across a series of steps, but I could not fully follow what they were asking. I kept clarifying and asking questions. The case was about launching a new game with free and paid visibility in the market. Even with the guidance, it was tense b…
Interview experiences · Capital One
Capital One Business Analyst interview: graph and percentage assessment
My process ended at the online assessment. My background leaned toward analytics, but the assessment was much more about business and math than analytics problems. The preparation material I found did not seem to match the format I received. There was a small set of questions on graphs, data interpretation, percentage calculations, and reasoning beyond plugging in numbers. I worked through them,…
Interview experiences · Capital One
Capital One Business Analyst interview with a mini case and Power Day
After an initial recruiter call, the process moved quickly to a mini case and then straight into a Power Day. It felt standard for a Business Analyst track: an HR conversation about what to expect, followed by quantitative case-style questions in the mini case. The Power Day was the heavier part, with several back-to-back interviews. During Power Day, I had case interviews and a product-focused r…
Interview experiences · Capital One
Capital One Data Analyst Interview Experience — A Groupon Break-Even Case, Fast-Tracked to the Next Round
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…
Interview experiences · Capital One
Capital One Data Analyst Interview Experience — Same OA, Now Cruise-Themed Instead of Superheroes
I noticed there isn't much here about this OA, and I just finished mine, so I wanted to share. The two Canada-version posts from 2024 are completely outdated now — what's being tested currently is very similar to another report I found. Basically the approach for every question is the same, except it's no longer about superheroes, it's about cruises now. There are 12 questions total, but the firs…
Interview experiences · Capital One
Capital One Data Analyst interview: Power Day cases after a data challenge
After an HR call, I had a technical screen that combined technical work with business problem solving. There was a coding test focused on SQL and Excel data management, then a data challenge where I analyzed the material and presented what I found. The process took about two months from beginning to end, longer than I expected because I kept waiting for the next step. Power Day had four rounds an…
Interview experiences · Capital One
Capital One Data Analyst interview: SQL and final business case
After a recruiter screen, I took an online technical test and then went through rounds that felt much more business heavy than advertised. The test had one basic SQL question and a larger set of data-manipulation multiple-choice items. The first interview mixed business-case work with a very quick SQL component, and a later technical round had easy LeetCode-style questions. The mismatch showed up…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — A 14-Question Excel and SQL Online Assessment
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — A 70-Minute OA With 14 Excel and SQL Questions
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — A Cloud Pricing Case with Break-Even Math
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — A Four-Round Power Day Onsite
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — A Grocery Loyalty Case With a Database-Outage Twist
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — A Smooth Power Day of Case, BQ, Case, and DC
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — A Streaming Renewal Case I Didn't Pass
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — A TV-Show Cancellation Case, Then a Power Day Invite in 90 Minutes
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — Data Challenge, Power Day, Offer in 3 Days
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — Four CodeSignal Tasks and No Reply After Nearly Two Weeks
It has been almost two weeks since I finished, and I have not heard anything, so I probably failed... This was the first interview of my job search, and I never expected to fall at the OA. Looking back, I did not take it seriously enough, did not prepare enough, and was not familiar with this OA format. There are many interview reports on the forum, so I am writing about a few things I had not se…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — HR Call Through a Full Power Day
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — OA, Data Challenge, and a Four-Round Power Day
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — Passed Power Day, Now Waiting on Team Matching
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…
Interview experiences · Capital One
Capital One Data Scientist Interview Experience — Power Day With Three Back-to-Back Case Studies
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…