Citadel vs Samsung Interview Questions
Citadel lists 101 LeetCode interview questions while Samsung lists 65. They share 12 problems — 12% of Citadel's bank and 18% of Samsung's. Focus on the overlap first, then drill into 89 Citadel-only and 53 Samsung-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 12 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Citadel and Samsung.
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 Samsung-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
12 Shared Questions
High-priority problems to practice for both Citadel and Samsung.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Number of Islands | Medium |
| Permutations | Medium |
| Merge k Sorted Lists | Hard |
| Trapping Rain Water | Hard |
| Median of Two Sorted Arrays | Hard |
| 3Sum | Medium |
| Word Search | Medium |
| Longest Increasing Subsequence | Medium |
| Rotting Oranges | Medium |
Unique to Citadel (89)
Problems in Citadel's list that do not appear at Samsung.
Unique to Samsung (53)
Problems in Samsung's list that do not appear at Citadel.
Frequently Asked Questions
How many LeetCode questions do Citadel and Samsung share?
Citadel and Samsung share 12 LeetCode interview questions. 89 problems appear only in Citadel's list and 53 appear only in Samsung's list.
What topics overlap most between Citadel and Samsung?
The most common shared topics between Citadel and Samsung are Array (10 shared questions), Dynamic Programming (3 shared questions), Matrix (3 shared questions), Linked List (2 shared questions), Sorting (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or Samsung?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. Samsung has 12 Easy, 36 Medium, and 17 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and Samsung?
Start with the 12 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 20 Samsung-specific questions to round out your prep.