Perplexity Interview Questions and Guide

Search plus LLMs: retrieval, ranking, low-latency serving and fast, pragmatic shipping.

The Perplexity interview loop

1. Recruiter screen
2. Technical screen (practical coding)
3. Onsite: practical coding, system design for search/LLM serving, and a founder/culture chat

Perplexity interview questions

• Design a Chat LLM Serving Platform
• Design a Batch Inference System
• In-Memory Database (Multi-Part)
• Time-Based Key-Value Store
• Implement a Rate Limiter Class
• Tell me about a time you had to learn something new quickly
• What questions do you have for me?
• Debug a Failing Test Suite with AI