Compare Iceberg, Delta Lake, and Hudi. How would you choose an open table format?
Each of the three brings ACID to object storage, yet they were built to solve different problems. The signal is fitting the format to the workload (engine neutrality, Spark-native ACID, or streaming upserts) instead of naming a favorite.
Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.
Each of the three brings ACID to object storage, yet they were built to solve different problems. The signal is fitting the format to the workload (engine neutrality, Spark-native ACID, or streaming upserts) instead of naming a favorite.
Lead with where the obvious approach breaks, because that is the judgment they are screening for — most candidates jump straight to the happy path and lose the room.
Then walk the failure back through the pipeline in order, naming the one metric the customer's exec sponsor actually cares about before you propose the fix.
