LinkedIn Interview Question Bank
LinkedIn's loop pivoted heavily in 2025 — Staff candidates now sit a packed two-round phone screen (coding + project retro) before a five-round onsite that includes an AI-Coding session in CoderPad's assistant pane. Behavioural depth is the dominant downlevel axis; the same coding bar that passes at Senior frequently caps a Staff loop with a downlevel offer.
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practice in the online judgeFind Users with a Short Login SessionFind the Second Minimum in a Tournament TreeValidate a Decimal Number StringImplement a Max StackGenerate a Uniform Random Integer in [0, 6] from a Biased Bit GeneratorImplement an LRU CacheMinimum-Cost Path in a Hidden Weighted GridNested List Weight Sum IICan Place Flowers with O(1) QueriesShortest Word Distance IIForm the Largest NumberShortest Word Distance IIDebug Logistic Regression Gradient and Cross-Entropy LossFind a Path with an Unknown-Grid RobotNearest Supply Point in a MapCount Distinct Values in a Huge Sorted ArrayFind K Closest Elements in a Sorted ArrayImplement Power FunctionMerge Two Keyed N-ary TreesMax Consecutive Ones II with Streaming Data Follow-upFind the Celebrity with Minimum API CallsInsert/Delete/GetRandom in O(1) with TTL per item (follow-up)SumTable: 2D Matrix Range Sum with Point UpdatesWeighted Probability Sampling (Softmax Dice Sampler)Kth Element (Find the k-th element)Reverse a StringDesign a Weighted Cache (Weighted LRU Cache)Sum of a Multidimensional ArrayDesign & Implement a Booking Scheduler (Earliest Available Start)Reservoir Sampling in an Infinite Stream