Prepare for Citadel technical interviews with 120 tracked LeetCode questions, sortable by difficulty and topic.
| Title | Difficulty | Topics | Frequency | LeetCode |
|---|---|---|---|---|
| Insert Delete GetRandom O(1) | Medium | 100% | Solve | |
| Longest Non-decreasing Subarray From Two Arrays | Medium | 100% | Solve | |
| LRU Cache | Medium | 100% | Solve | |
| Design In-Memory File System | Hard | 97.8% | Solve | |
| Maximum Profit in Job Scheduling | Hard | 94.5% | Solve | |
| Minimum Knight Moves | Medium | 93.4% | Solve | |
| Evaluate Reverse Polish Notation | Medium | 93.2% | Solve | |
| Best Time to Buy and Sell Stock | Easy | 92% | Solve | |
| Climbing Stairs | Easy | 92% | Solve | |
| Number of Dice Rolls With Target Sum | Medium | 89.3% | Solve | |
| Parallel Courses III | Hard | 89.3% | Solve | |
| Course Schedule | Medium | 85.6% | Solve | |
| Evaluate Division | Medium | 82.3% | Solve | |
| Count Palindromic Subsequences | Hard | 81.3% | Solve | |
| Alien Dictionary | Hard | 80.4% | Solve | |
| Delete and Earn | Medium | 79.9% | Solve | |
| LFU Cache | Hard | 79.8% | Solve | |
| Minimum Equal Sum of Two Arrays After Replacing Zeros | Medium | 79.8% | Solve | |
| Course Schedule II | Medium | 79% | Solve | |
| Minimum Operations to Make Numbers Non-positive | Hard | 78.1% | Solve |
120 questions total
Company analytics
Questions tracked
120
Questions currently linked to Citadel
Topics represented
51
Distinct topics visible in this company set
Dominant difficulty
medium
62% of tracked questions
Avg frequency score
58.8
Mean frequency across this company question set
Citadel currently has 120 tracked questions linked to 51 topics, so this page is a good benchmark for how deep the dataset goes on one employer.
The most common topics for Citadel include Array, Dynamic Programming, Hash Table, and String. Array alone appears 72 times in the visible topic distribution. That topic spread helps you identify whether this company is repeating a few patterns or testing across a broader surface area.
The current question set averages a frequency score of 58.8, and medium is the dominant difficulty bucket at 62% of tracked coverage. That makes it easier to decide whether to practice for repetition, complexity, or both.
Citadel related paths
This section answers the most practical questions about using the Citadel route as a company-specific LeetCode study page.
Start with the highest-frequency questions inside Array, Dynamic Programming, and Hash Table, then sort the table by frequency to build a shortlist. That gives you a faster first pass through Citadel's interview patterns than trying to cover every linked problem at once.
medium makes up 62% of the tracked Citadel question set. Use that split to decide whether your study plan should emphasize coverage, realistic interview pressure, or deeper problem solving.
Use this page to identify Citadel's strongest topic signal, then open Array and the global most-asked or questions explorer routes to see whether that company-specific pattern is also common across the wider dataset.
