Citadel vs Snowflake Interview Questions
Citadel lists 101 LeetCode interview questions while Snowflake lists 100. They share 20 problems — 20% of Citadel's bank and 20% of Snowflake's. Focus on the overlap first, then drill into 81 Citadel-only and 80 Snowflake-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 20 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Citadel and Snowflake.
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 Snowflake-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
20 Shared Questions
High-priority problems to practice for both Citadel and Snowflake.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Insert Delete GetRandom O(1) | Medium |
| Parallel Courses III | Hard |
| Number of Islands | Medium |
| Find Median from Data Stream | Hard |
| Merge k Sorted Lists | Hard |
| Trapping Rain Water | Hard |
| Regular Expression Matching | Hard |
| Design Circular Queue | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Word Search | Medium |
| Container With Most Water | Medium |
| Rotting Oranges | Medium |
| Populating Next Right Pointers in Each Node II | Medium |
| Simplify Path | Medium |
| Populating Next Right Pointers in Each Node | Medium |
| Basic Calculator | Hard |
| Course Schedule II | Medium |
| Course Schedule | Medium |
Unique to Citadel (81)
Problems in Citadel's list that do not appear at Snowflake.
Unique to Snowflake (80)
Problems in Snowflake's list that do not appear at Citadel.
Frequently Asked Questions
How many LeetCode questions do Citadel and Snowflake share?
Citadel and Snowflake share 20 LeetCode interview questions. 81 problems appear only in Citadel's list and 80 appear only in Snowflake's list.
What topics overlap most between Citadel and Snowflake?
The most common shared topics between Citadel and Snowflake are Array (9 shared questions), Depth-First Search (6 shared questions), Breadth-First Search (6 shared questions), Linked List (5 shared questions), Design (5 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or Snowflake?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. Snowflake has 13 Easy, 67 Medium, and 20 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and Snowflake?
Start with the 20 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 20 Snowflake-specific questions to round out your prep.