Xai Machine Learning Engineer Interview Questions
Practice the exact questions companies are asking right now.
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Implement dynamic batching for token decoding
You are given a black-box “simulated language model” interface that can advance many sequences in a batch. Model interface - Tokens are integers. - mo...
Identify all bad nodes with group tests
You have N nodes. Each node is either good or bad (unknown to you). You can call a function test(S) on a subset of nodes S: - test(S) = True iff all n...
Implement a trie-based tokenizer
Design and Implement a Trie-Based Subword Tokenizer for LLM Pretraining Context You are building a subword tokenizer for a large-scale LLM pretraining...
Design O(1) random-sampling set
Design a data structure that supports insert(x), remove(x), and get_random() that returns a uniformly random element among the present items, all in e...
Design a house-price prediction workflow
Predicting Home Sale Prices: End-to-End ML Design Context You have historical home-sale records with features such as lot area, year built, number of ...
Describe your research and contributions
10–15 Minute Research Project Overview (Technical Screen) Context You are interviewing for a Machine Learning Engineer role. Prepare a concise, techni...
Validate normalized palindromes with variants
Implement a function isNormalizedPalindrome(s) that returns true if s reads the same forward and backward after removing non‑alphanumeric characters a...
What are processes vs threads?
Question Explain the difference between multiprocessing and multithreading in the context of building concurrent applications. Cover the following: - ...
Design agentic workflow to generate a 1-hour movie
Prompt You’re asked to design an agentic workflow (multiple LLM/tools acting as “agents” under an orchestrator) that can generate a ~60-minute movie f...