Citadel data analyst interviews focus on SQL, data visualisation, business metrics, statistical analysis, and translating data insights into actionable recommendations.
All Roles
Software Engineer
Backend Engineer
Frontend Engineer
Full Stack Engineer
Mobile Engineer
Data Engineer
Data Scientist
ML Engineer
DevOps Engineer
DevOps Engineer
Product Manager
SRE
Security Engineer
Engineering Manager
Data Analyst
UX/UI Designer
QA Engineer
coding
Medium
Verified Question
#1
1. DAG Order Validator
Category: Topological sort coding problem# DAG Order Validator Given a Directed Acyclic Graph (DAG) and a list of nodes, determine if the list represents a valid topological sort...Input: Graph (nodes and edges)
Output: Computed result
coding
Medium
Verified Question
#2
2. Expression Evaluator
Category: String coding problem# Expression Evaluator You need to design and implement an expression evaluator that parses and computes mathematical expressions formatted in...Input: String
Output: Computed result
coding
Medium
Verified Question
#3
3. Knight Moves on Phone
Category: String coding problem# Knight Moves on Phone This problem is split into two parts.Input: List
Output: Integer
coding
Medium
Verified Question
#4
4. Price Change Aggregator
Category: Algorithm coding problem# Price Change Aggregator You are building a system to aggregate price updates from multiple feeds to reconstruct the price history of an asset.Input: List
Output: Computed result
coding
Hard
Verified Question
#5
5. Visit All Cities
Category: Graph coding problem# Visit All Cities You are given a list of airline tickets where each ticket represents a directed edge from a departure airport to an arrival...Input: Graph (nodes and edges)
Output: Computed result
coding
Medium
Verified Question
#6
6. Social Network Friend Suggester
Category: Array coding problemBuild a friend recommendation system for a social network. Given
n users (indexed 0 to n - 1) and a list of existing friendships (undirected...Input: ArrayOutput: Array
coding
Medium
Verified Question
#7
7. Minimum Sum Tree Path
Category: Binary tree coding problem# Minimum Sum Tree PathInput: Binary tree
Output: Computed result
coding
Medium
Verified Question
#8
8. Dial Pad Knight Paths
Category: Algorithm coding problem# Dial Pad Knight PathsInput: Number(s)
Output: Integer
coding
Hard
Verified Question
#9
9. Subsequence Goodness Values
Category: Array coding problem# Subsequence Goodness ValuesInput: Array
Output: Integer
coding
Medium
Verified Question
#10
10. Sliding Window Top K
Category: Sliding window coding problem# Sliding Window Top KInput: Array of integers
Output: Computed result
coding
Medium
Verified Question
#11
11. Price Stream Merger
Category: Heap-based coding problem# Price Stream MergerInput: List
Output: Computed result
coding
Hard
Verified Question
#12
12. Pandigital Addition Count
Category: Algorithm coding problem# Pandigital Addition CountInput: Integer(s)
Output: Computed result
coding
Medium
Verified Question
#13
13. Closest Point Pair
Category: Algorithm coding problem# Closest Point PairInput: List
Output: Integer
coding
Hard
Verified Question
#14
14. Flight Itinerary Planner
Category: Graph coding problem# Flight Itinerary PlannerInput: Graph (nodes and edges)
Output: Computed result
coding
Hard
Verified Question
#15
15. Process Schedule Counter
Category: Algorithm coding problem# Process Schedule CounterInput: List
Output: Integer
coding
Medium
Verified Question
#16
16. [CodeSignal] Common Free Slot
Category: Interval-based coding problem# [CodeSignal] Common Free SlotInput: List
Output: Computed result
coding
Easy
Verified Question
#17
17. [CodeSignal] Stable Server Segments
Category: Array coding problem# [CodeSignal] Stable Server SegmentsInput: Array
Output: Computed result
No AI generated questions yet for Citadel.
Related Citadel Data Analyst interview prep
Start practicing Citadel questions
Sign up for free to access walkthroughs, AI-generated questions, and more.
Get Started Free