Citadel vs Waymo Interview Questions
Citadel lists 101 LeetCode interview questions while Waymo lists 25. They share 7 problems — 7% of Citadel's bank and 28% of Waymo's. Focus on the overlap first, then drill into 94 Citadel-only and 18 Waymo-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 7 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Citadel and Waymo.
Step 2 — Company-specific depth: Add Citadel-specific problems like Longest Non-decreasing Subarray From Two Arrays, Binary Tree Maximum Path Sum, Delete and Earn and Waymo-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Waymo skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
7 Shared Questions
High-priority problems to practice for both Citadel and Waymo.
| Problem | Difficulty |
|---|---|
| Minimum Knight Moves | Medium |
| Number of Islands | Medium |
| Robot Room Cleaner | Hard |
| Regular Expression Matching | Hard |
| Design Excel Sum Formula | Hard |
| Alien Dictionary | Hard |
| Max Points on a Line | Hard |
Unique to Citadel (94)
Problems in Citadel's list that do not appear at Waymo.
Unique to Waymo (18)
Problems in Waymo's list that do not appear at Citadel.
| Problem | Difficulty |
|---|---|
| Random Pick with Weight | Medium |
| Logger Rate Limiter | Easy |
| Number of Visible People in a Queue | Hard |
| Meeting Rooms II | Medium |
| Minimum Number of Refueling Stops | Hard |
| Minimum Area Rectangle | Medium |
| Design Tic-Tac-Toe | Medium |
| Shortest Distance from All Buildings | Hard |
| Maximum Gap | Medium |
| Divide Array in Sets of K Consecutive Numbers | Medium |
| Find Peak Element | Medium |
| Text Justification | Hard |
Frequently Asked Questions
How many LeetCode questions do Citadel and Waymo share?
Citadel and Waymo share 7 LeetCode interview questions. 94 problems appear only in Citadel's list and 18 appear only in Waymo's list.
What topics overlap most between Citadel and Waymo?
The most common shared topics between Citadel and Waymo are Array (4 shared questions), Breadth-First Search (3 shared questions), String (3 shared questions), Depth-First Search (2 shared questions), Matrix (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or Waymo?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. Waymo has 1 Easy, 13 Medium, and 11 Hard questions. Waymo has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and Waymo?
Start with the 7 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 18 Waymo-specific questions to round out your prep.