PayPal vs X Interview Questions
PayPal lists 105 LeetCode interview questions while X lists 51. They share 6 problems — 6% of PayPal's bank and 12% of X's. Focus on the overlap first, then drill into 99 PayPal-only and 45 X-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 6 overlapping problems first. These are the highest-yield questions for candidates interviewing at both PayPal and X.
Step 2 — Company-specific depth: Add PayPal-specific problems like Zigzag Conversion, Minimum Absolute Difference, Longest Increasing Subsequence and X-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: X skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
6 Shared Questions
High-priority problems to practice for both PayPal and X.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Valid Parentheses | Easy |
| Trapping Rain Water | Hard |
| Happy Number | Easy |
| Design Twitter | Medium |
Unique to PayPal (99)
Problems in PayPal's list that do not appear at X.
Unique to X (45)
Problems in X's list that do not appear at PayPal.
| Problem | Difficulty |
|---|---|
| Tweet Counts Per Frequency | Medium |
| Flatten Nested List Iterator | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Binary Gap | Easy |
| Regular Expression Matching | Hard |
| Integer to Roman | Medium |
| Word Break II | Hard |
| Alien Dictionary | Hard |
| Time Needed to Buy Tickets | Easy |
| Max Points on a Line | Hard |
| Merge k Sorted Lists | Hard |
Frequently Asked Questions
How many LeetCode questions do PayPal and X share?
PayPal and X share 6 LeetCode interview questions. 99 problems appear only in PayPal's list and 45 appear only in X's list.
What topics overlap most between PayPal and X?
The most common shared topics between PayPal and X are Hash Table (3 shared questions), Linked List (2 shared questions), Design (2 shared questions), Array (2 shared questions), Stack (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: PayPal or X?
PayPal has 19 Easy, 69 Medium, and 17 Hard questions. X has 8 Easy, 31 Medium, and 12 Hard questions. X has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both PayPal and X?
Start with the 6 shared problems since they cover what both companies ask most often. Then add 20 PayPal-specific and 20 X-specific questions to round out your prep.