Citadel vs PhonePe Interview Questions
Citadel lists 101 LeetCode interview questions while PhonePe lists 93. They share 21 problems — 21% of Citadel's bank and 23% of PhonePe's. Focus on the overlap first, then drill into 80 Citadel-only and 72 PhonePe-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 21 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Citadel and PhonePe.
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 PhonePe-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
21 Shared Questions
High-priority problems to practice for both Citadel and PhonePe.
| Problem | Difficulty |
|---|---|
| Sliding Window Maximum | Hard |
| Maximum Total Damage With Spell Casting | Medium |
| LRU Cache | Medium |
| Evaluate Division | Medium |
| Merge Intervals | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Number of Islands | Medium |
| Group Anagrams | Medium |
| Trapping Rain Water | Hard |
| Best Time to Buy and Sell Stock II | Medium |
| Best Time to Buy and Sell Stock III | Hard |
| Minimum Height Trees | Medium |
| Maximal Square | Medium |
| Alien Dictionary | Hard |
| House Robber | Medium |
| Asteroid Collision | Medium |
| Rotting Oranges | Medium |
| Bus Routes | Hard |
| Best Time to Buy and Sell Stock IV | Hard |
| Course Schedule II | Medium |
| Koko Eating Bananas | Medium |
Unique to Citadel (80)
Problems in Citadel's list that do not appear at PhonePe.
Unique to PhonePe (72)
Problems in PhonePe's list that do not appear at Citadel.
Frequently Asked Questions
How many LeetCode questions do Citadel and PhonePe share?
Citadel and PhonePe share 21 LeetCode interview questions. 80 problems appear only in Citadel's list and 72 appear only in PhonePe's list.
What topics overlap most between Citadel and PhonePe?
The most common shared topics between Citadel and PhonePe are Array (18 shared questions), Dynamic Programming (8 shared questions), Breadth-First Search (7 shared questions), Depth-First Search (5 shared questions), Hash Table (4 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or PhonePe?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. PhonePe has 2 Easy, 58 Medium, and 33 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and PhonePe?
Start with the 21 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 20 PhonePe-specific questions to round out your prep.