Intel vs X Interview Questions
Intel lists 25 LeetCode interview questions while X lists 51. They share 3 problems — 12% of Intel's bank and 6% of X's. Focus on the overlap first, then drill into 22 Intel-only and 48 X-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 3 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Intel and X.
Step 2 — Company-specific depth: Add Intel-specific problems like Find Consecutive Integers from a Data Stream, Maximum Nesting Depth of the Parentheses, Number of Islands 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
3 Shared Questions
High-priority problems to practice for both Intel and X.
| Problem | Difficulty |
|---|---|
| Trapping Rain Water | Hard |
| Valid Parentheses | Easy |
| LRU Cache | Medium |
Unique to Intel (22)
Problems in Intel's list that do not appear at X.
| Problem | Difficulty |
|---|---|
| Find Consecutive Integers from a Data Stream | Medium |
| Maximum Nesting Depth of the Parentheses | Easy |
| Number of Islands | Medium |
| Copy List with Random Pointer | Medium |
| Two Sum | Easy |
| Count Primes | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock II | Medium |
| Reverse Integer | Medium |
| Maximum Subarray | Medium |
| Climbing Stairs | Easy |
| Merge Two Sorted Lists | Easy |
Unique to X (48)
Problems in X's list that do not appear at Intel.
| Problem | Difficulty |
|---|---|
| Merge Intervals | Medium |
| Tweet Counts Per Frequency | Medium |
| Flatten Nested List Iterator | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Design Twitter | 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 |
Frequently Asked Questions
How many LeetCode questions do Intel and X share?
Intel and X share 3 LeetCode interview questions. 22 problems appear only in Intel's list and 48 appear only in X's list.
What topics overlap most between Intel and X?
The most common shared topics between Intel and X are Stack (2 shared questions), Array (1 shared questions), Two Pointers (1 shared questions), Dynamic Programming (1 shared questions), Monotonic Stack (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Intel or X?
Intel has 10 Easy, 14 Medium, and 1 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 Intel and X?
Start with the 3 shared problems since they cover what both companies ask most often. Then add 20 Intel-specific and 20 X-specific questions to round out your prep.