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Citadel Interview Questions (2026)
Practice 19 real Citadel interview questions.
- 2Easy
- 12Medium
- 5Hard
Catalog refreshed Oct 24, 2026
Price Stream Merger
Medium
FREE
Price Change Aggregator
medium
FREE
Number of Stable Subarrays
Medium
PREMIUM
Non-Consecutive Process Schedules
Easy
PREMIUM
[CodeSignal] Common Free Slot
Medium
PREMIUM
[CodeSignal] Stable Server Segments
Easy
PREMIUM
Minimum Sum Tree Path
Medium
PREMIUM
Dial Pad Knight Paths
Medium
PREMIUM
Subsequence Goodness Values
Hard
PREMIUM
Sliding Window Top K
Medium
PREMIUM
Social Network Friend Suggester
Medium
PREMIUM
Pandigital Addition Count
Hard
PREMIUM
Closest Point Pair
Medium
PREMIUM
Flight Itinerary Planner
Hard
PREMIUM
Process Schedule Counter
Hard
PREMIUM
Knight Moves on Phone
medium
PREMIUM
Expression Evaluator
medium
PREMIUM
DAG Order Validator
medium
PREMIUM
Visit All Cities
hard
PREMIUM
Unlock all 19 Citadel questions
17 questions are included with Premium; 2 are free with an account.
Citadel Interview FAQ
There are 19 Citadel interview questions right now, and new ones are added as engineers report them.
Yes. Every question here was reported by someone who was asked it in a real Citadel interview, and the set keeps growing as new reports come in.
Yes. Every Citadel question opens in a built-in editor where you can write, run, and submit your solution in Python, JavaScript, TypeScript, Java, or Rust.
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