Question bank

4,310 interview questions, answered.

Reference answers, what the interviewer is really testing, how it is graded, and the follow-ups that come next.

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5 questions

  1. 1Linked List CycleEasyCoding· CCognitree
  2. 2Balanced TreeMediumCoding· Spotify, Uber
  3. 3Find the longest substring without repeating characters.MediumCoding· Apple, Intuit
  4. 4Find the lowest common ancestor (LCA) of two nodes in a binary tree.MediumCoding· Apple, LinkedIn
  5. 5Valid ParenthesesEasyCoding· Apple, Booking.com