Airbnb vs Citadel Interview Questions
Airbnb lists 63 LeetCode interview questions while Citadel lists 101. They share 10 problems — 16% of Airbnb's bank and 10% of Citadel's. Focus on the overlap first, then drill into 53 Airbnb-only and 91 Citadel-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 10 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Airbnb and Citadel.
Step 2 — Company-specific depth: Add Airbnb-specific problems like Text Justification, Maximum Profit in Job Scheduling, Flatten 2D Vector 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
10 Shared Questions
High-priority problems to practice for both Airbnb and Citadel.
| Problem | Difficulty |
|---|---|
| Design Excel Sum Formula | Hard |
| Trapping Rain Water | Hard |
| Alien Dictionary | Hard |
| Employee Free Time | Hard |
| Regular Expression Matching | Hard |
| Merge k Sorted Lists | Hard |
| House Robber | Medium |
| Maximal Square | Medium |
| Combination Sum | Medium |
| Consecutive Numbers Sum | Hard |
Unique to Airbnb (53)
Problems in Airbnb's list that do not appear at Citadel.
| Problem | Difficulty |
|---|---|
| Text Justification | Hard |
| Maximum Profit in Job Scheduling | Hard |
| Flatten 2D Vector | Medium |
| Smallest Common Region | Medium |
| Palindrome Pairs | Hard |
| Maximum Candies You Can Get from Boxes | Hard |
| Pour Water | Medium |
| Sliding Puzzle | Hard |
| Intersection of Two Linked Lists | Easy |
| Contains Duplicate II | Easy |
| Simple Bank System | Medium |
| IP to CIDR | Medium |
Unique to Citadel (91)
Problems in Citadel's list that do not appear at Airbnb.
Frequently Asked Questions
How many LeetCode questions do Airbnb and Citadel share?
Airbnb and Citadel share 10 LeetCode interview questions. 53 problems appear only in Airbnb's list and 91 appear only in Citadel's list.
What topics overlap most between Airbnb and Citadel?
The most common shared topics between Airbnb and Citadel are Array (7 shared questions), Dynamic Programming (4 shared questions), String (3 shared questions), Graph Theory (2 shared questions), Topological Sort (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Airbnb or Citadel?
Airbnb has 11 Easy, 31 Medium, and 21 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 Airbnb and Citadel?
Start with the 10 shared problems since they cover what both companies ask most often. Then add 20 Airbnb-specific and 20 Citadel-specific questions to round out your prep.