IBM vs Tesla Interview Questions
IBM lists 115 LeetCode interview questions while Tesla lists 41. They share 14 problems — 12% of IBM's bank and 34% of Tesla's. Focus on the overlap first, then drill into 101 IBM-only and 27 Tesla-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 14 overlapping problems first. These are the highest-yield questions for candidates interviewing at both IBM and Tesla.
Step 2 — Company-specific depth: Add IBM-specific problems like Find the Smallest Divisor Given a Threshold, Gray Code, Exclusive Time of Functions and Tesla-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Tesla skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
14 Shared Questions
High-priority problems to practice for both IBM and Tesla.
| Problem | Difficulty |
|---|---|
| 3Sum | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Two Sum | Easy |
| Rotate Image | Medium |
| Merge Intervals | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Valid Parentheses | Easy |
| Letter Combinations of a Phone Number | Medium |
| Longest Consecutive Sequence | Medium |
| Maximum Subarray | Medium |
| Trapping Rain Water | Hard |
| Median of Two Sorted Arrays | Hard |
| Happy Number | Easy |
| LRU Cache | Medium |
Unique to IBM (101)
Problems in IBM's list that do not appear at Tesla.
Unique to Tesla (27)
Problems in Tesla's list that do not appear at IBM.
| Problem | Difficulty |
|---|---|
| Minimum Changes To Make Alternating Binary String | Easy |
| Find Followers Count | Easy |
| Number of Islands | Medium |
| Basic Calculator II | Medium |
| Building H2O | Medium |
| Design Circular Queue | Medium |
| Reorganize String | Medium |
| Rectangle Area | Medium |
| Snakes and Ladders | Medium |
| Evaluate Division | Medium |
| Top K Frequent Elements | Medium |
| Word Ladder | Hard |
Frequently Asked Questions
How many LeetCode questions do IBM and Tesla share?
IBM and Tesla share 14 LeetCode interview questions. 101 problems appear only in IBM's list and 27 appear only in Tesla's list.
What topics overlap most between IBM and Tesla?
The most common shared topics between IBM and Tesla are Array (9 shared questions), Hash Table (6 shared questions), Two Pointers (3 shared questions), Dynamic Programming (3 shared questions), String (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: IBM or Tesla?
IBM has 33 Easy, 73 Medium, and 9 Hard questions. Tesla has 10 Easy, 26 Medium, and 5 Hard questions. Tesla has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both IBM and Tesla?
Start with the 14 shared problems since they cover what both companies ask most often. Then add 20 IBM-specific and 20 Tesla-specific questions to round out your prep.