xAI Interview Questions

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Software Engineer AI Engineer Site Reliability Engineer Product Manager

What is the project you are most proud of? Has video answer
+232 months ago60 answers
Implement LRU Cache.
+21a month ago34 answers
Design a file upload feature for an AI chat application.
a month ago1 answer
Design a rate limiter. Has video answer
+27 months ago13 answers
Design and implement an in-memory key-value store that supports set, transactional begin, commit, and abort operations.
a month ago1 answer
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Design a task management system with tasks broken into sub-tasks.
7 months ago1 answer
If you were building an autocomplete experience, how would you use underlying data to predict the next word a person is going to type?
a year ago
Tell me about the accomplishment you are most proud of.
+17 months ago2 answers
Implement an iterator class that supports next, hasNext, getState, and setState, then extend it to treat a list of iterators as one continuous iterator with a global index.
a month ago
Given a large, partially implemented LLM/agentic codebase, identify the intended behavior and implement a missing function by reading and reasoning through the existing code, without explicit test cases or I/O specs.
a month ago
Assume the model needs a 20% precision improvement in 2 weeks to 1 month and you have 8 to 10 contractors. How would you approach it, what data would you use, and how would you leverage the team?
a year ago
Why do you want to join an AI-first company?
a month ago
How have you led teams at scale to improve models or algorithms post-training, especially using contractors?
a year ago

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xAI Interview Questions

What is the project you are most proud of? Has video answer

Implement LRU Cache.

Design a file upload feature for an AI chat application.

Design a rate limiter. Has video answer

Design and implement an in-memory key-value store that supports set, transactional begin, commit, and abort operations.

Design a task management system with tasks broken into sub-tasks.

If you were building an autocomplete experience, how would you use underlying data to predict the next word a person is going to type?

Tell me about the accomplishment you are most proud of.

Implement an iterator class that supports next, hasNext, getState, and setState, then extend it to treat a list of iterators as one continuous iterator with a global index.

Given a large, partially implemented LLM/agentic codebase, identify the intended behavior and implement a missing function by reading and reasoning through the existing code, without explicit test cases or I/O specs.

Assume the model needs a 20% precision improvement in 2 weeks to 1 month and you have 8 to 10 contractors. How would you approach it, what data would you use, and how would you leverage the team?

Why do you want to join an AI-first company?

How have you led teams at scale to improve models or algorithms post-training, especially using contractors?

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