Reddit Interview Question Bank
Reddit's loop runs on a small, slowly-rotating bank of company-specific coding prompts (Tennis Scoring, Report Chain, Chat Message Merge) paired with product-flavored system-design rounds (Game Leaderboard, Live Chat, Notification System). The bar is high on clean OOD and crisp clarification — multi-part prompts are routinely under-scoped on purpose, and rounds end without finishing all parts. Ads and ML Platform orgs add a hiring-manager domain round on top of the standard loop; recent cohorts also report aggressive down-leveling and long team-match limbo after a passing loop.
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Filter Dog and Cat Comment SubtreesFind Dog Comment Subtrees Exceeding a Score ThresholdFilter Reddit Comments by User PreferenceTennis Match Scoring: Game and SetWord LadderValidate a Word Ladder SequenceSliding-Window Abuse Detection with CooldownFilter Reddit Comment Subtrees by User PreferenceStraight-Line Word SearchBaseball Game Scoring SystemValidate a Word Transformation SequenceImplement an In-Memory Chatter Message StoreReplace Round-Robin Routing with Least-Latency RoutingImplement a Circuit Breaker for Backend ServersModerator Privilege Ranking System with Communities and DemotionMerge Chat MessagesImplement a Simplified Memcached ProtocolDesign a Tennis Match Scoring SystemCan Moderator A Remove Moderator B Based on Add OrderProcess Moderator Audit Logs: Order Moderators by Last Add TimeReddit Hack2Hire Coding Question (link provided)Coding 2 - Odd Even Linked ListCoding 1 - Shortest PalindromeReport ChainTennis Game Score ConversionReport Chain QuestionClassic Tennis QuestionSimple LeetCode questionMerge and Sort Chat MessagesBill Status