Explore questions associated with Citadel. Review the source details, then use the workspace for code, notes, and diagrams.
65 questions in the library. A source association does not guarantee a future interview question.
Behavioral and leadership · Coding · Machine learning · Other questions · System design
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Companies: Citadel
Companies: Citadel
They asked me to implement a balanced binary search tree from scratch and explain its time complexity. They also wanted me to optimize it for…
Companies: Citadel
Companies: Citadel
Design a time-based key-value store that records multiple values per key with timestamps and returns the value whose timestamp is the largest <= the queried…
Companies: Citadel, Amazon, Anthropic, Apple +8
Binary Search · Design · Hash Table · String
Given an array of integers and a target, return the indices of two distinct elements whose values sum to the target (exactly one valid solution…
Companies: Citadel, Amazon, Apple, Bloomberg +13
Array · Hash Table
Companies: Citadel
Companies: Citadel
Companies: Citadel
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Companies: Citadel, Anthropic, LinkedIn, Netflix +1