Oracle
The 35 Oracle interview problems asked most — recent (last six months) first, then all-time frequency — grouped by pattern.
0 / 26 done
Arrays & Hashing
- Two SumEasy
- Group AnagramsMedium
- Top K Frequent ElementsMedium
Two Pointers
- Two Sum II Input Array Is SortedMedium
- Container With Most WaterMedium
- 3SumMedium
- Trapping Rain WaterHard
Sliding Window
Stack
- Valid ParenthesesEasy
- Min StackMedium
- Asteroid CollisionMedium
Binary Search
Linked List
- LRU CacheMedium
- Merge K Sorted ListsHard
- Reverse Linked ListEasy
Trees
Graphs
- Number of IslandsMedium
1-D DP
Greedy
- Maximum SubarrayMedium
Intervals
- Merge IntervalsMedium
- Meeting Rooms IIMedium
Math & Geometry
- Spiral MatrixMedium
Strings
- Roman to IntegerEasy