xAI data scientist interviews test statistical reasoning, ML model design, SQL proficiency, A/B testing methodology, and Python-based algorithm implementation.
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coding
Easy
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#1
1. Parallel Segment Sort
Category: Array coding problemA distributed processing pipeline accelerates sorting by assigning different portions of an array to separate worker threads. Given an integer array...Input: Array
Output: Computed result
coding
Hard
Verified Question
#2
2. API Credit Manager
Category: Interval-based coding problemYou are building an API credit management system for a cloud platform. Each client account is assigned a custom credit policy that defines the...Input: Array of strings
Output: Integer
coding
Hard
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#3
3. Token Cache
Category: Tree coding problemA language model inference service caches previously computed token sequences to avoid redundant computation. The cache uses a compressed prefix tree...Input: List
Output: Computed result
coding
Medium
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#4
4. Corrupted Sensor Detector
Category: Algorithm coding problemYou are managing a network of
n environmental sensors labeled 0 to n - 1. Each sensor is either functioning correctly or corrupted, but you do...Input: ListOutput: Computed result
coding
Hard
Verified Question
#5
5. Config Store
Category: Trie-based coding problemYou are building a versioned configuration store for a deployment system. The store supports reading, writing, and deleting string configuration...Input: String
Output: Computed result
coding
Hard
Verified Question
#6
6. Phrase Tokenizer
Category: String coding problemGiven a string of space-separated words and a dictionary of recognized phrases, split the string into tokens. Phrases in the dictionary represent...Input: String
Output: Computed result
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