Citadel vs Yahoo Interview Questions
Citadel lists 101 LeetCode interview questions while Yahoo lists 34. They share 7 problems — 7% of Citadel's bank and 21% of Yahoo's. Focus on the overlap first, then drill into 94 Citadel-only and 27 Yahoo-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 Yahoo.
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 Yahoo-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
7 Shared Questions
High-priority problems to practice for both Citadel and Yahoo.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Evaluate Division | Medium |
| Serialize and Deserialize Binary Tree | Hard |
| Validate Binary Search Tree | Medium |
| Combination Sum | Medium |
| Median of Two Sorted Arrays | Hard |
| Word Search | Medium |
Unique to Citadel (94)
Problems in Citadel's list that do not appear at Yahoo.
Unique to Yahoo (27)
Problems in Yahoo's list that do not appear at Citadel.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Maximum Depth of Binary Tree | Easy |
| Reverse Linked List | Easy |
| Contains Duplicate | Easy |
| Largest Palindrome Product | Hard |
| Roman to Integer | Easy |
| Word Break | Medium |
| Linked List Cycle | Easy |
| Matrix Cells in Distance Order | Easy |
| Non-decreasing Subsequences | Medium |
| Maximum Distance in Arrays | Medium |
| Binary Number with Alternating Bits | Easy |
Frequently Asked Questions
How many LeetCode questions do Citadel and Yahoo share?
Citadel and Yahoo share 7 LeetCode interview questions. 94 problems appear only in Citadel's list and 27 appear only in Yahoo's list.
What topics overlap most between Citadel and Yahoo?
The most common shared topics between Citadel and Yahoo are Array (4 shared questions), Depth-First Search (4 shared questions), String (3 shared questions), Design (2 shared questions), Breadth-First Search (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or Yahoo?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. Yahoo has 11 Easy, 20 Medium, and 3 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and Yahoo?
Start with the 7 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 20 Yahoo-specific questions to round out your prep.