Citadel vs Roblox Interview Questions
Citadel lists 101 LeetCode interview questions while Roblox lists 56. They share 11 problems — 11% of Citadel's bank and 20% of Roblox's. Focus on the overlap first, then drill into 90 Citadel-only and 45 Roblox-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 11 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Citadel and Roblox.
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 Roblox-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
11 Shared Questions
High-priority problems to practice for both Citadel and Roblox.
| Problem | Difficulty |
|---|---|
| Sliding Window Maximum | Hard |
| Merge Intervals | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Employee Free Time | Hard |
| Trapping Rain Water | Hard |
| Design Search Autocomplete System | Hard |
| Implement Trie (Prefix Tree) | Medium |
| Rotting Oranges | Medium |
| Reorganize String | Medium |
| Course Schedule II | Medium |
| Course Schedule | Medium |
Unique to Citadel (90)
Problems in Citadel's list that do not appear at Roblox.
Unique to Roblox (45)
Problems in Roblox's list that do not appear at Citadel.
Frequently Asked Questions
How many LeetCode questions do Citadel and Roblox share?
Citadel and Roblox share 11 LeetCode interview questions. 90 problems appear only in Citadel's list and 45 appear only in Roblox's list.
What topics overlap most between Citadel and Roblox?
The most common shared topics between Citadel and Roblox are Array (6 shared questions), Heap (Priority Queue) (4 shared questions), Sorting (4 shared questions), Hash Table (3 shared questions), Design (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or Roblox?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. Roblox has 8 Easy, 35 Medium, and 13 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and Roblox?
Start with the 11 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 20 Roblox-specific questions to round out your prep.