MediumDataSystem design

What is delta lake?

Asked at

Databricks

1Give yourself 5 minutes

2Answer out loud, not in your head

3Then compare with the answer below

Reference answer

Delta Lake is an open-source storage layer that brings ACID (Atomicity, Consistency, Isolation, Durability) transactions to data lakes. It sits on top of existing cloud storage (like S3, ADLS, GCS) and provides a transactional metadata layer. This enables reliable data engineering operations such as upserts, merges, and deletes, while also supporting schema enforcement, schema evolution, and time travel for data versioning.

Hiring now

Databricks has 857 open roles right now

landed applies to roles like these for you, on each company’s own site, with answers written for the role.

Get 5x interviews10 free auto-applies. No card.

Director, Enterprise (NSW)
Sydney, Australia
Engineering Manager - Notebook Dataplane
Mountain View, California
Sr. Research Scientist - Agent Flywheel
New York City, New York

Or practice this question first

Next question