Citadel vs Okta Interview Questions
Citadel lists 101 LeetCode interview questions while Okta lists 20. They share 10 problems — 10% of Citadel's bank and 50% of Okta's. Focus on the overlap first, then drill into 91 Citadel-only and 10 Okta-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 Okta.
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 Okta-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 Okta.
| 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 |
| Median of Two Sorted Arrays | Hard |
| Insert Delete GetRandom O(1) - Duplicates allowed | Hard |
| Word Ladder II | Hard |
| Container With Most Water | Medium |
Unique to Citadel (91)
Problems in Citadel's list that do not appear at Okta.
Unique to Okta (10)
Problems in Okta's list that do not appear at Citadel.
| Problem | Difficulty |
|---|---|
| Simple Bank System | Medium |
| All Nodes Distance K in Binary Tree | Medium |
| Longest Consecutive Sequence | Medium |
| Daily Temperatures | Medium |
| Task Scheduler | Medium |
| Making File Names Unique | Medium |
| Range Sum Query 2D - Immutable | Medium |
| Reverse Substrings Between Each Pair of Parentheses | Medium |
| Word Ladder | Hard |
| Product of Array Except Self | Medium |
Frequently Asked Questions
How many LeetCode questions do Citadel and Okta share?
Citadel and Okta share 10 LeetCode interview questions. 91 problems appear only in Citadel's list and 10 appear only in Okta's list.
What topics overlap most between Citadel and Okta?
The most common shared topics between Citadel and Okta are Array (7 shared questions), Hash Table (5 shared questions), Design (4 shared questions), Sorting (3 shared questions), Math (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or Okta?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. Okta has 0 Easy, 15 Medium, and 5 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and Okta?
Start with the 10 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 10 Okta-specific questions to round out your prep.