Capital One Interview Question Bank
Capital One's engineering loop is unusually predictable: a long CodeSignal OA gates everyone, then a single Power Day stitches four 45-60 minute rounds — coding, system design, case study, and behavioral — back to back. The technical bar is moderate but the case study and BQ rounds carry real weight, especially for MLE / Applied Research / Data Science where the business-context framing of a model decision is the differentiating signal.
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Predict Driver ClassPreprocess Driver Classification DataBuild Driver-Level Feature DatasetDriver Dataset Exploratory AnalysisSort Colors In-PlaceBuild Blocks and Check Interval AvailabilityFind the First Pattern-Matching SubmatrixSorted Cyclic Shift Absolute DifferencesFirst Element With Two Strictly Larger NeighborsBanking System with Account Activity RankingCount Subarrays with k Disjoint Equal PairsDistinct Border Sum of Maximum-Sum FramesWait Time for the Next BusReorder a String from Both EndsBrightest Position on StreetNumber of Subarrays That Match a Pattern ISort Adjacent PairsCount Pairs Matchable by One Digit SwapFind Top Two TeamsCheck Whether a Board Fits Between BlockersFind an Exact Submatrix PatternCheck Alternating Peaks and Valleys in a Circular ArrayRank Football Teams and Return Top Two IndicesIn-Memory Banking SystemFind the First Dictionary Word Matchable as a Reusable-Character SubsequenceSort Every Border Layer of a Matrix ClockwiseArrange W, D, and L Results into Repeated WDL GroupsReorder a String by Alternating EndsBanking System with Top Activity AccountsSort Matrix Anti-Diagonals by Their Letter Sequences