This Repository contains the java solutions for the Amazon OA Questions found here List of Questions: Index Name Frequency Level Status Notes leet link 1. Top K Frequently Mentioned Keywords ⭐⭐⭐ Experienced ✅ link 2. Zombie in Matrix (Min hours to send file to all available servers) ⭐⭐⭐ Experienced ✅ link 4. Product Suggestions System ⭐⭐ Experienced ✅ Try solving with Tries link 5. Number of Clusters ⭐⭐ Experienced ✅ Try to reduce the call stack without recursion link 6. Reorder Data in Log Files ⭐⭐ Experienced ✅ link 8. K Closes Points ⭐ Intern ✅ link 9. Find Pair With Given Sum ⭐⭐ Experienced, Intern ✅ link 10. Max Of Min Altitudes ⭐⭐ Intern ✅ link 11. Min Cost to Connect Ropes Experienced ✅ link 12. Treasure Island / Min Distance to Remove the Obstacle (BFS) Experienced ✅ link 13. Favorite Genres ⭐⭐ New Grad ✅ link 14. Treasure Island 2 ✅ link 15. 01 Matrix ✅ link 16. Merge Two Sorted Lists ⭐⭐ [New Grad Intern] ✅ 17. Most Common Word ⭐⭐ [Intern] ✅ link 18. N-Ary Subtree with Max Average ✅ link 19. Subtree of Another Tree ⭐⭐ [New Grad] ✅ link 20. Prison Cells After N Days ✅ link 21. Two Sum Unique Pairs ⭐⭐ [New Grad] ✅ link 22. Find N Unique Integers Sum to Zero ✅ link 23. Spiral Matrix ii ⭐⭐ [New Grad] ✅ link 24. Sub Strings Of Size K With K Distinct Chars [New Grad] ✅ link 24. Longest substring without repeating characters [New Grad] ✅ link 26. longest Vowel substring In a String ✅ link 27. Generate Parentheses ⭐ [Intern] ✅ link