DE Shaw vs Oracle Interview Questions
DE Shaw lists 105 LeetCode interview questions while Oracle lists 314. They share 35 problems — 33% of DE Shaw's bank and 11% of Oracle's. Focus on the overlap first, then drill into 70 DE Shaw-only and 279 Oracle-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 35 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DE Shaw and Oracle.
Step 2 — Company-specific depth: Add DE Shaw-specific problems like Binary Tree Cameras, Find Minimum Cost to Remove Array Elements, Maximum Number of Subsequences After One Inserting and Oracle-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: DE Shaw skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
35 Shared Questions
High-priority problems to practice for both DE Shaw and Oracle.
| Problem | Difficulty |
|---|---|
| Letter Combinations of a Phone Number | Medium |
| Trapping Rain Water | Hard |
| House Robber | Medium |
| Valid Parentheses | Easy |
| Majority Element | Easy |
| Insert Delete GetRandom O(1) | Medium |
| Reorganize String | Medium |
| Sliding Window Maximum | Hard |
| Koko Eating Bananas | Medium |
| Rotting Oranges | Medium |
| Longest Consecutive Sequence | Medium |
| Find the Smallest Divisor Given a Threshold | Medium |
| Consecutive Numbers Sum | Hard |
| LRU Cache | Medium |
| Asteroid Collision | Medium |
| Open the Lock | Medium |
| Median of Two Sorted Arrays | Hard |
| Number of Islands | Medium |
| Search a 2D Matrix | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Basic Calculator II | Medium |
| Decode Ways | Medium |
| Text Justification | Hard |
| Longest Substring Without Repeating Characters | Medium |
| Find First and Last Position of Element in Sorted Array | Medium |
| Split Array Largest Sum | Hard |
| Word Search II | Hard |
| Longest Valid Parentheses | Hard |
| Minimum Size Subarray Sum | Medium |
| Wildcard Matching | Hard |
Showing top 30 of 35 shared problems.
Unique to DE Shaw (70)
Problems in DE Shaw's list that do not appear at Oracle.
Unique to Oracle (279)
Problems in Oracle's list that do not appear at DE Shaw.
| Problem | Difficulty |
|---|---|
| Group Anagrams | Medium |
| Top K Frequent Elements | Medium |
| Merge k Sorted Lists | Hard |
| Merge Intervals | Medium |
| Meeting Rooms II | Medium |
| Longest Palindromic Substring | Medium |
| Spiral Matrix | Medium |
| Minimum One Bit Operations to Make Integers Zero | Hard |
| LFU Cache | Hard |
| Search in Rotated Sorted Array | Medium |
| Remove All Adjacent Duplicates in String II | Medium |
| 3Sum | Medium |
Frequently Asked Questions
How many LeetCode questions do DE Shaw and Oracle share?
DE Shaw and Oracle share 35 LeetCode interview questions. 70 problems appear only in DE Shaw's list and 279 appear only in Oracle's list.
What topics overlap most between DE Shaw and Oracle?
The most common shared topics between DE Shaw and Oracle are Array (20 shared questions), String (11 shared questions), Hash Table (8 shared questions), Dynamic Programming (7 shared questions), Binary Search (7 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DE Shaw or Oracle?
DE Shaw has 11 Easy, 64 Medium, and 30 Hard questions. Oracle has 61 Easy, 194 Medium, and 59 Hard questions. DE Shaw has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DE Shaw and Oracle?
Start with the 35 shared problems since they cover what both companies ask most often. Then add 20 DE Shaw-specific and 20 Oracle-specific questions to round out your prep.