Anduril vs Citadel Interview Questions
Anduril lists 55 LeetCode interview questions while Citadel lists 101. They share 14 problems — 25% of Anduril's bank and 14% of Citadel's. Focus on the overlap first, then drill into 41 Anduril-only and 87 Citadel-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 Anduril and Citadel.
Step 2 — Company-specific depth: Add Anduril-specific problems like Video Stitching, Daily Temperatures, Heaters and Citadel-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
14 Shared Questions
High-priority problems to practice for both Anduril and Citadel.
| Problem | Difficulty |
|---|---|
| Number of Islands | Medium |
| Course Schedule II | Medium |
| Course Schedule | Medium |
| Group Anagrams | Medium |
| Search Suggestions System | Medium |
| Find Median from Data Stream | Hard |
| Merge Intervals | Medium |
| Rotting Oranges | Medium |
| Merge k Sorted Lists | Hard |
| Evaluate Reverse Polish Notation | Medium |
| Palindromic Substrings | Medium |
| Find the Duplicate Number | Medium |
| LRU Cache | Medium |
| House Robber | Medium |
Unique to Anduril (41)
Problems in Anduril's list that do not appear at Citadel.
| Problem | Difficulty |
|---|---|
| Video Stitching | Medium |
| Daily Temperatures | Medium |
| Heaters | Medium |
| Shortest Word Distance | Easy |
| Maximum Number of Visible Points | Hard |
| Making A Large Island | Hard |
| Shortest Word Distance II | Medium |
| Queries on Number of Points Inside a Circle | Medium |
| Race Car | Hard |
| Spiral Matrix | Medium |
| Ransom Note | Easy |
| Shortest Path in Binary Matrix | Medium |
Unique to Citadel (87)
Problems in Citadel's list that do not appear at Anduril.
Frequently Asked Questions
How many LeetCode questions do Anduril and Citadel share?
Anduril and Citadel share 14 LeetCode interview questions. 41 problems appear only in Anduril's list and 87 appear only in Citadel's list.
What topics overlap most between Anduril and Citadel?
The most common shared topics between Anduril and Citadel are Array (8 shared questions), Breadth-First Search (4 shared questions), Sorting (4 shared questions), Depth-First Search (3 shared questions), String (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Anduril or Citadel?
Anduril has 8 Easy, 40 Medium, and 7 Hard questions. Citadel has 5 Easy, 60 Medium, and 36 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Anduril and Citadel?
Start with the 14 shared problems since they cover what both companies ask most often. Then add 20 Anduril-specific and 20 Citadel-specific questions to round out your prep.