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Interview question tracker

Oracle Coding Interview Questions — Last 6 months

Practice 102 coding questions from Oracle company-tagged LeetCode lists in the source’s last 6 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 102

Done	Question	LeetCode
Mark LRU Cache completed	LRU Cache	Solve
Mark Longest Substring Without Repeating Characters completed	Longest Substring Without Repeating Characters	Solve
Mark Count the Number of Infection Sequences completed	Count the Number of Infection Sequences	Solve
Mark Group Anagrams completed	Group Anagrams	Solve
Mark Meeting Rooms II completed	Meeting Rooms II	Solve
Mark Merge k Sorted Lists completed	Merge k Sorted Lists	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 Consecutive Numbers Sum completed	Consecutive Numbers Sum	Solve
Mark Decode String completed	Decode String	Solve
Mark Find Median from Data Stream completed	Find Median from Data Stream	Solve
Mark LFU Cache completed	LFU Cache	Solve
Mark Logger Rate Limiter completed	Logger Rate Limiter	Solve
Mark Longest Consecutive Sequence completed	Longest Consecutive Sequence	Solve
Mark Longest Palindromic Substring completed	Longest Palindromic Substring	Solve
Mark Maximum Number of Events That Can Be Attended completed	Maximum Number of Events That Can Be Attended	Solve
Mark Meeting Rooms completed	Meeting Rooms	Solve
Mark Merge Intervals completed	Merge Intervals	Solve
Mark Number of Islands completed	Number of Islands	Solve
Mark Remove All Adjacent Duplicates in String II completed	Remove All Adjacent Duplicates in String II	Solve
Mark Search in Rotated Sorted Array completed	Search in Rotated Sorted Array	Solve
Mark Spiral Matrix completed	Spiral Matrix	Solve
Mark Asteroid Collision completed	Asteroid Collision	Solve
Mark Best Time to Buy and Sell Stock completed	Best Time to Buy and Sell Stock	Solve
Mark Binary Tree Level Order Traversal completed	Binary Tree Level Order Traversal	Solve
Mark Capacity To Ship Packages Within D Days completed	Capacity To Ship Packages Within D Days	Solve
Mark Container With Most Water completed	Container With Most Water	Solve
Mark Contiguous Array completed	Contiguous Array	Solve
Mark Copy List with Random Pointer completed	Copy List with Random Pointer	Solve
Mark Course Schedule II completed	Course Schedule II	Solve
Mark Decrypt String from Alphabet to Integer Mapping completed	Decrypt String from Alphabet to Integer Mapping	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 Diagonal Traverse completed	Diagonal Traverse	Solve
Mark Diameter of Binary Tree completed	Diameter of Binary Tree	Solve
Mark Divide Two Integers completed	Divide Two Integers	Solve
Mark Evaluate Reverse Polish Notation completed	Evaluate Reverse Polish Notation	Solve
Mark First Missing Positive completed	First Missing Positive	Solve
Mark Gas Station completed	Gas Station	Solve
Mark Generate Parentheses completed	Generate Parentheses	Solve
Mark Implement Trie (Prefix Tree) completed	Implement Trie (Prefix Tree)	Solve
Mark Integer to English Words completed	Integer to English Words	Solve
Mark Integer to Roman completed	Integer to Roman	Solve
Mark Keys and Rooms completed	Keys and Rooms	Solve
Mark Koko Eating Bananas completed	Koko Eating Bananas	Solve
Mark Kth Largest Element in an Array completed	Kth Largest Element in an Array	Solve
Mark Largest Divisible Subset completed	Largest Divisible Subset	Solve
Mark Largest Number completed	Largest Number	Solve
Mark Letter Combinations of a Phone Number completed	Letter Combinations of a Phone Number	Solve
Mark Longest Common Prefix completed	Longest Common Prefix	Solve
Mark Longest Mountain in Array completed	Longest Mountain in Array	Solve
Mark Lowest Common Ancestor of a Binary Tree completed	Lowest Common Ancestor of a Binary Tree	Solve
Mark Maximum Earnings From Taxi completed	Maximum Earnings From Taxi	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 Maximum Subarray completed	Maximum Subarray	Solve
Mark Merge Two Sorted Lists completed	Merge Two Sorted Lists	Solve
Mark Min Stack completed	Min Stack	Solve
Mark Minimum Array Sum completed	Minimum Array Sum	Solve
Mark Minimum Number of Steps to Make Two Strings Anagram completed	Minimum Number of Steps to Make Two Strings Anagram	Solve
Mark Minimum One Bit Operations to Make Integers Zero completed	Minimum One Bit Operations to Make Integers Zero	Solve
Mark Move Zeroes completed	Move Zeroes	Solve
Mark Number of Distinct Islands completed	Number of Distinct Islands	Solve
Mark Permutation in String completed	Permutation in String	Solve
Mark Permutations completed	Permutations	Solve
Mark Pour Water completed	Pour Water	Solve
Mark Remove Duplicates from Sorted List completed	Remove Duplicates from Sorted List	Solve
Mark Remove K Digits completed	Remove K Digits	Solve
Mark Restore IP Addresses completed	Restore IP Addresses	Solve
Mark Reverse Integer completed	Reverse Integer	Solve
Mark Reverse Linked List II completed	Reverse Linked List II	Solve
Mark Reverse Substrings Between Each Pair of Parentheses completed	Reverse Substrings Between Each Pair of Parentheses	Solve
Mark Reverse Words in a String completed	Reverse Words in a String	Solve
Mark Rotate Image completed	Rotate Image	Solve
Mark Rotate String completed	Rotate String	Solve
Mark Rotting Oranges completed	Rotting Oranges	Solve
Mark Search a 2D Matrix completed	Search a 2D Matrix	Solve
Mark Search a 2D Matrix II completed	Search a 2D Matrix II	Solve
Mark Second Highest Salary completed	Second Highest Salary	Solve
Mark Simplify Path completed	Simplify Path	Solve
Mark Single Element in a Sorted Array completed	Single Element in a Sorted Array	Solve
Mark Sort an Array completed	Sort an Array	Solve
Mark Sort Colors completed	Sort Colors	Solve
Mark Sort List completed	Sort List	Solve
Mark Sqrt(x) completed	Sqrt(x)	Solve
Mark String Compression completed	String Compression	Solve
Mark Surrounded Regions completed	Surrounded Regions	Solve
Mark Task Scheduler completed	Task Scheduler	Solve
Mark Top K Frequent Words completed	Top K Frequent Words	Solve
Mark Trapping Rain Water completed	Trapping Rain Water	Solve
Mark Valid Anagram completed	Valid Anagram	Solve
Mark Valid Palindrome completed	Valid Palindrome	Solve
Mark Validate Binary Search Tree completed	Validate Binary Search Tree	Solve
Mark Word Break II completed	Word Break II	Solve
Mark Word Ladder completed	Word Ladder	Solve
Mark Word Search completed	Word Search	Solve