Citadel Interview Questions and Guide

Hard algorithmic problems done fast and bug-free, performance awareness (memory, latency, concurrency), and depth in your primary language.

The Citadel interview loop

1. Online assessment
2. 1–2 technical phone screens
3. Onsite: 4–5 rounds of algorithms, systems/C++ depth, design and behavioral

Citadel interview questions

• Design a Stock Exchange
• Design a Real-Time Market Data Feed
• Text Justification
• Online Stock Span
• Number of Orders in the Backlog
• Time-Based Key-Value Store
• Flood Fill
• Word Break
• Best Time to Buy and Sell Stock With Cooldown
• Palindrome Partitioning
• Add Binary
• Design a Stock Exchange Order Book
• Tell me about a time you took ownership beyond your role
• Tell me about a production incident you handled