Citadel vs DocuSign Interview Questions
Citadel lists 101 LeetCode interview questions while DocuSign lists 36. They share 10 problems — 10% of Citadel's bank and 28% of DocuSign's. Focus on the overlap first, then drill into 91 Citadel-only and 26 DocuSign-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 10 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Citadel and DocuSign.
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 DocuSign-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
10 Shared Questions
High-priority problems to practice for both Citadel and DocuSign.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Number of Islands | Medium |
| Find Median from Data Stream | Hard |
| Group Anagrams | Medium |
| Search Suggestions System | Medium |
| Trapping Rain Water | Hard |
| Implement Trie (Prefix Tree) | Medium |
| Integer to Roman | Medium |
Unique to Citadel (91)
Problems in Citadel's list that do not appear at DocuSign.
Unique to DocuSign (26)
Problems in DocuSign's list that do not appear at Citadel.
Frequently Asked Questions
How many LeetCode questions do Citadel and DocuSign share?
Citadel and DocuSign share 10 LeetCode interview questions. 91 problems appear only in Citadel's list and 26 appear only in DocuSign's list.
What topics overlap most between Citadel and DocuSign?
The most common shared topics between Citadel and DocuSign are Array (6 shared questions), Hash Table (5 shared questions), Design (4 shared questions), Sorting (4 shared questions), String (4 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or DocuSign?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. DocuSign has 3 Easy, 26 Medium, and 7 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and DocuSign?
Start with the 10 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 20 DocuSign-specific questions to round out your prep.