🎯 Interview Questions — Index
Parent: JS Array Index
| # | Question | Difficulty | Technique |
|---|---|---|---|
| Q1 | Find All Duplicates | Easy | Set / Index marking |
| Q2 | Missing Number | Easy | Sum formula / XOR |
| Q3 | Single Number | Easy | XOR |
| Q4 | Plus One | Easy | Carry logic |
| Q5 | Max Product Two Elements | Easy | Two max tracking |
| Q6 | Best Time to Buy Stock | Medium | Min tracking |
| Q7 | Find Disappeared Numbers | Medium | Index negation |
| Q8 | Majority Element | Medium | Boyer-Moore |
| Q9 | Jump Game | Medium | Greedy |
| Q10 | Spiral Matrix | Medium | Boundary shrinking |
| Q11 | Rotate Matrix 90° | Medium | Transpose + Reverse |
| Q12 | Longest Consecutive | Medium | Set |
| Q13 | Merge Intervals | Medium | Sort + Merge |
| Q14 | Group Anagrams | Medium | Sort key + Map |
| Q15 | Next Permutation | Medium | Find + Swap + Reverse |
| Q16 | First Missing Positive | Hard | Cyclic sort |
| Q17 | Median Two Sorted Arrays | Hard | Binary search |
| Q18 | Equal 0s and 1s Subarray | Medium | Prefix + Map |