Citadel vs Tesla Interview Questions
Citadel lists 101 LeetCode interview questions while Tesla lists 41. They share 15 problems — 15% of Citadel's bank and 37% of Tesla's. Focus on the overlap first, then drill into 86 Citadel-only and 26 Tesla-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 15 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Citadel and Tesla.
Step 2 — Company-specific depth: Add Citadel-specific problems like Longest Non-decreasing Subarray From Two Arrays, Binary Tree Maximum Path Sum, Minimum Knight Moves and Tesla-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Citadel skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
15 Shared Questions
High-priority problems to practice for both Citadel and Tesla.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Evaluate Division | Medium |
| Merge Intervals | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Evaluate Reverse Polish Notation | Medium |
| Number of Islands | Medium |
| Trapping Rain Water | Hard |
| Design Circular Queue | Medium |
| Letter Combinations of a Phone Number | Medium |
| Median of Two Sorted Arrays | Hard |
| 3Sum | Medium |
| Word Ladder II | Hard |
| Container With Most Water | Medium |
| Reorganize String | Medium |
| Course Schedule | Medium |
Unique to Citadel (86)
Problems in Citadel's list that do not appear at Tesla.
Unique to Tesla (26)
Problems in Tesla's list that do not appear at Citadel.
| Problem | Difficulty |
|---|---|
| Minimum Changes To Make Alternating Binary String | Easy |
| Find Followers Count | Easy |
| Basic Calculator II | Medium |
| Building H2O | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Rectangle Area | Medium |
| Valid Parentheses | Easy |
| Two Sum | Easy |
| Snakes and Ladders | Medium |
| Top K Frequent Elements | Medium |
| Maximum Subarray | Medium |
| Word Ladder | Hard |
Frequently Asked Questions
How many LeetCode questions do Citadel and Tesla share?
Citadel and Tesla share 15 LeetCode interview questions. 86 problems appear only in Citadel's list and 26 appear only in Tesla's list.
What topics overlap most between Citadel and Tesla?
The most common shared topics between Citadel and Tesla are Array (10 shared questions), Hash Table (4 shared questions), String (4 shared questions), Breadth-First Search (4 shared questions), Depth-First Search (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or Tesla?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. Tesla has 10 Easy, 26 Medium, and 5 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and Tesla?
Start with the 15 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 20 Tesla-specific questions to round out your prep.