Oracle Interview Question Bank
Oracle's loops split along two clear axes: OCI (Cloud Infrastructure) runs a fairly standard LC + system-design loop with heavy Indian interviewer rotation, while OHAI (Oracle Health, the post-Cerner business unit) leans into OOD/class-design problems built around healthcare scenarios. Coding bars are mostly easy-to-medium, but interviewer variance and post-loop down-leveling / ghosting are unusually common — the loop result often determines the eventual level, not just the yes/no.
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Rotate a Matrix 90 Degrees Clockwise In PlaceMaximum Revenue from Non-overlapping Flower BouquetsTrapping Rain WaterCoin Change with Unbounded and 0/1 Knapsack VariantsMaking A Large IslandNumber of Islands Using BFSMinimum Length Subarray with Distinct-Value Sum at Least TargetTime Based Key-Value StoreDesign an LRU CacheMeeting Rooms IIDetect a Cycle in a Directed GraphRemove All Adjacent Duplicates in String IISum of Root To Leaf Binary NumbersNext PermutationDesign an Authentication Manager with Token TTLReplace a Range of Nodes in a Linked ListValid Parenthesis StringValid ParenthesesCount Islands and Find the Largest Island AreaMaximum of Minimums of Every WindowMaximum Subarray Sum with Length at Most KDesign a Token Authentication ManagerMaximum Height of Each IslandAccounts MergeTime-Based Key-Value StoreInteger Square RootAdd One to a Number Represented by Digits Without ArrayListBest Time to Buy and Sell StockPartition a String into Exactly Three Palindromic SubstringsTop K Frequent Elements with Descending Value Tie-Break