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Interview question tracker

Oracle Coding Interview Questions — Last 3 months

Practice 46 coding questions from Oracle company-tagged LeetCode lists in the source’s last 3 months reporting window. Explore reported interview questions and track your progress.

Company-wide data from Fahad7177-jeh/leetcode-company-wise-questions; see its AGPL-3.0 license. All-time questions also use dataengineervishal/leetcode-companywise-questions (MIT license).

Reporting periods reflect source data, not verified interview dates. Questions can recur; inclusion does not guarantee they will appear in your interview.

Updated weekly · Latest source check: 15 Oct 2026ⓘLatest successful check of the sources used by this company. A check does not necessarily mean the questions changed.

One question at a time.

Top questions 46

Done	Question	LeetCode
Mark LRU Cache completed	LRU Cache	Solve
Mark Count the Number of Infection Sequences completed	Count the Number of Infection Sequences	Solve
Mark Longest Substring Without Repeating Characters completed	Longest Substring Without Repeating Characters	Solve
Mark Consecutive Numbers Sum completed	Consecutive Numbers Sum	Solve
Mark Meeting Rooms II completed	Meeting Rooms II	Solve
Mark Sliding Window Maximum completed	Sliding Window Maximum	Solve
Mark Top K Frequent Elements completed	Top K Frequent Elements	Solve
Mark Two Sum completed	Two Sum	Solve
Mark Valid Parentheses completed	Valid Parentheses	Solve
Mark 3Sum completed	3Sum	Solve
Mark Capacity To Ship Packages Within D Days completed	Capacity To Ship Packages Within D Days	Solve
Mark Copy List with Random Pointer completed	Copy List with Random Pointer	Solve
Mark Decode String completed	Decode String	Solve
Mark Longest Consecutive Sequence completed	Longest Consecutive Sequence	Solve
Mark Longest Palindromic Substring completed	Longest Palindromic Substring	Solve
Mark Merge k Sorted Lists completed	Merge k Sorted Lists	Solve
Mark Min Stack completed	Min Stack	Solve
Mark Number of Islands completed	Number of Islands	Solve
Mark Single Element in a Sorted Array completed	Single Element in a Sorted Array	Solve
Mark Sort Colors completed	Sort Colors	Solve
Mark Degree of an Array completed	Degree of an Array	Solve
Mark Delete Node in a BST completed	Delete Node in a BST	Solve
Mark Design HashMap completed	Design HashMap	Solve
Mark Design In-Memory File System completed	Design In-Memory File System	Solve
Mark Diameter of Binary Tree completed	Diameter of Binary Tree	Solve
Mark Evaluate Reverse Polish Notation completed	Evaluate Reverse Polish Notation	Solve
Mark Group Anagrams completed	Group Anagrams	Solve
Mark Implement Trie (Prefix Tree) completed	Implement Trie (Prefix Tree)	Solve
Mark Integer to English Words completed	Integer to English Words	Solve
Mark Kth Largest Element in an Array completed	Kth Largest Element in an Array	Solve
Mark LFU Cache completed	LFU Cache	Solve
Mark Longest Common Prefix completed	Longest Common Prefix	Solve
Mark Longest Mountain in Array completed	Longest Mountain in Array	Solve
Mark Maximum Number of Events That Can Be Attended completed	Maximum Number of Events That Can Be Attended	Solve
Mark Maximum Number of Non-overlapping Palindrome Substrings completed	Maximum Number of Non-overlapping Palindrome Substrings	Solve
Mark Maximum Profit From Trading Stocks completed	Maximum Profit From Trading Stocks	Solve
Mark Maximum Profit in Job Scheduling completed	Maximum Profit in Job Scheduling	Solve
Mark Meeting Rooms completed	Meeting Rooms	Solve
Mark Minimum Array Sum completed	Minimum Array Sum	Solve
Mark Minimum One Bit Operations to Make Integers Zero completed	Minimum One Bit Operations to Make Integers Zero	Solve
Mark Permutations completed	Permutations	Solve
Mark Remove All Adjacent Duplicates in String II completed	Remove All Adjacent Duplicates in String II	Solve
Mark Reverse Substrings Between Each Pair of Parentheses completed	Reverse Substrings Between Each Pair of Parentheses	Solve
Mark Sort List completed	Sort List	Solve
Mark Sqrt(x) completed	Sqrt(x)	Solve
Mark Trapping Rain Water completed	Trapping Rain Water	Solve