Data Engineering Interview Practice Kit — 10 scenarios with worked answers

Ten original practice scenarios for experienced data engineers: idempotent ingestion, backfills without double counting, slowly changing dimensions, skewed joins, data-quality contracts, streaming watermark tradeoffs, and more. Work each one in 20 minutes, then compare against a worked reference answer and score yourself with the included scorecard. Everything is vendor-neutral and synthetic — no recycled employer questions, no memorization bait: these train the reasoning interviewers actually probe.

You get five UTF-8 Markdown files plus a browser-readable copy of the same customer terms in one ZIP: the scenarios, the worked reference answers, the self-scoring scorecard, a usage guide, and the license/support/refund terms. Readable in any text editor; formatting is best in a Markdown viewer. No executable practice environment or database is included, and no interview or hiring outcome is promised.

Includes 14 days of email Q&A support about using the kit and a 14-calendar-day refund request window — full terms in the included TERMS.md and customer-terms.html.