Apple vs Oracle Interview Questions
Apple lists 300 LeetCode interview questions while Oracle lists 314. They share 144 problems — 48% of Apple's bank and 46% of Oracle's. Focus on the overlap first, then drill into 156 Apple-only and 170 Oracle-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 144 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Apple and Oracle.
Step 2 — Company-specific depth: Add Apple-specific problems like Best Time to Buy and Sell Stock II, Reverse Bits, Snapshot Array and Oracle-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Oracle skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
144 Shared Questions
High-priority problems to practice for both Apple and Oracle.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Two Sum | Easy |
| Number of Islands | Medium |
| Merge Intervals | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Design Hit Counter | Medium |
| Longest Common Prefix | Easy |
| Rotate Array | Medium |
| Reverse Linked List | Easy |
| Valid Sudoku | Medium |
| Group Anagrams | Medium |
| Top K Frequent Elements | Medium |
| Course Schedule II | Medium |
| Course Schedule | Medium |
| Valid Parentheses | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Product of Array Except Self | Medium |
| Valid Palindrome | Easy |
| Rotate Image | Medium |
| Reverse Words in a String | Medium |
| Kth Largest Element in an Array | Medium |
| Spiral Matrix | Medium |
| Maximum Subarray | Medium |
| Reverse Integer | Medium |
| Merge k Sorted Lists | Hard |
| Meeting Rooms II | Medium |
| Trapping Rain Water | Hard |
| Time Based Key-Value Store | Medium |
| Lowest Common Ancestor of a Binary Tree | Medium |
| Subarray Sum Equals K | Medium |
Showing top 30 of 144 shared problems.
Unique to Apple (156)
Problems in Apple's list that do not appear at Oracle.
| Problem | Difficulty |
|---|---|
| Best Time to Buy and Sell Stock II | Medium |
| Reverse Bits | Easy |
| Snapshot Array | Medium |
| Number of 1 Bits | Easy |
| Compare Version Numbers | Medium |
| Find the Index of the First Occurrence in a String | Easy |
| Peeking Iterator | Medium |
| Design Tic-Tac-Toe | Medium |
| Pascal's Triangle | Easy |
| Ransom Note | Easy |
| Max Points on a Line | Hard |
| Number of Squareful Arrays | Hard |
Unique to Oracle (170)
Problems in Oracle's list that do not appear at Apple.
Frequently Asked Questions
How many LeetCode questions do Apple and Oracle share?
Apple and Oracle share 144 LeetCode interview questions. 156 problems appear only in Apple's list and 170 appear only in Oracle's list.
What topics overlap most between Apple and Oracle?
The most common shared topics between Apple and Oracle are Array (18 shared questions), Hash Table (8 shared questions), String (7 shared questions), Sorting (5 shared questions), Two Pointers (5 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Apple or Oracle?
Apple has 76 Easy, 178 Medium, and 46 Hard questions. Oracle has 61 Easy, 194 Medium, and 59 Hard questions. Oracle has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Apple and Oracle?
Start with the 144 shared problems since they cover what both companies ask most often. Then add 20 Apple-specific and 20 Oracle-specific questions to round out your prep.