Google vs Oracle Interview Questions
Google lists 2,305 LeetCode interview questions while Oracle lists 314. They share 286 problems — 12% of Google's bank and 91% of Oracle's. Focus on the overlap first, then drill into 2,019 Google-only and 28 Oracle-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 286 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Google and Oracle.
Step 2 — Company-specific depth: Add Google-specific problems like Create Hello World Function, Recyclable and Low Fat Products, Add Two Integers and Oracle-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Google skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
286 Shared Questions
High-priority problems to practice for both Google and Oracle.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Add Two Numbers | Medium |
| Trapping Rain Water | Hard |
| Median of Two Sorted Arrays | Hard |
| Longest Common Prefix | Easy |
| Palindrome Number | Easy |
| Merge Sorted Array | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| 3Sum | Medium |
| Merge Strings Alternately | Easy |
| Longest Palindromic Substring | Medium |
| Longest Consecutive Sequence | Medium |
| Container With Most Water | Medium |
| Valid Parentheses | Easy |
| Majority Element | Easy |
| Roman to Integer | Easy |
| Merge Intervals | Medium |
| Number of Islands | Medium |
| Maximum Subarray | Medium |
| Reverse Integer | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Subarray Sum Equals K | Medium |
| Climbing Stairs | Easy |
| Merge Two Sorted Lists | Easy |
| Next Permutation | Medium |
| Generate Parentheses | Medium |
| Spiral Matrix | Medium |
| Meeting Rooms II | Medium |
| Reverse Linked List | Easy |
Showing top 30 of 286 shared problems.
Unique to Google (2,019)
Problems in Google's list that do not appear at Oracle.
| Problem | Difficulty |
|---|---|
| Create Hello World Function | Easy |
| Recyclable and Low Fat Products | Easy |
| Add Two Integers | Easy |
| Remove Element | Easy |
| Pascal's Triangle | Easy |
| 4Sum | Medium |
| Single Number | Easy |
| Concatenation of Array | Easy |
| Find the Index of the First Occurrence in a String | Easy |
| Search Insert Position | Easy |
| Plus One | Easy |
| Viewers Turned Streamers | Hard |
Unique to Oracle (28)
Problems in Oracle's list that do not appear at Google.
Frequently Asked Questions
How many LeetCode questions do Google and Oracle share?
Google and Oracle share 286 LeetCode interview questions. 2019 problems appear only in Google's list and 28 appear only in Oracle's list.
What topics overlap most between Google and Oracle?
The most common shared topics between Google and Oracle are Array (18 shared questions), Two Pointers (9 shared questions), String (7 shared questions), Hash Table (6 shared questions), Dynamic Programming (6 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Google or Oracle?
Google has 601 Easy, 1205 Medium, and 499 Hard questions. Oracle has 61 Easy, 194 Medium, and 59 Hard questions. Google has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Google and Oracle?
Start with the 286 shared problems since they cover what both companies ask most often. Then add 20 Google-specific and 20 Oracle-specific questions to round out your prep.