Coding Interview Questions (Practice the Real Thing)

Coding interview questions are trying to answer one thing: can you actually write and debug code. Instead of memorizing lists, practice the real problems - bugs to track down, APIs to build, systems to reason about - solved in a live cloud workspace across every track.

Why practicing real problems beats a question bank

A question bank teaches you to recognize a question; real practice teaches you to solve one you have never seen, which is what the interview actually measures. Working real problems also gives you concrete examples to talk about instead of rehearsed answers.

18 real scenarios to practice

Build an End-to-End RAG PipelineAI/ML · Senior Build an LLM Evaluation Harness (Golden Set)AI/ML · Senior Route LLM Requests to Cheaper ModelsAI/ML · Senior Build a Tool-Calling Agent LoopAI/ML · Senior Stream a RAG Answer With Inline CitationsAI/ML · Senior Add a NOT NULL Column With a Zero-Downtime BackfillBackend · Senior Refactor Globals Into Dependency InjectionBackend · Senior Route Reads to a Postgres ReplicaBackend · Senior Design a URL Shortener (System Design)Backend · Senior Design a Rate Limiter (Token Bucket)Backend · Senior Make a Stripe Webhook Idempotent (Retry-Safe)Backend · Senior Trace Slow Requests With OpenTelemetryBackend · Senior Build a Kimball Star SchemaData · Senior Wire Data Quality Tests Across a dbt LineageData · Senior Handle Parquet Schema Evolution (v1 + v2)Data · Senior Build an Exactly-Once Kafka PipelineData · Senior Switch Batch ETL to Streaming on AWS KinesisData · Senior Ship a Zero-Downtime Blue-Green DeployDevOps · Senior

What coding interviews actually test

Reading unfamiliar code, handling edge cases, reasoning about trade-offs, and explaining your thinking - not trivia recall. Each problem here drills one of those on a real system, so your answers in the room come from having done it.

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