AWS Data Engineer 2026 vs SQLPrep

Non-Affiliation Disclaimer (DEA-C01) This app is an independent exam preparation resource and is not affiliated with, endorsed by, or connected with Amazon Web Services (AWS). All practice materials are created solely for learning and study purposes. Trademark Notice (DEA-C01) AWS, Amazon Web Services, and DEA-C01 are trademarks or registered trademarks of Amazon Web Services, Inc.
Any references to AWS exams or terminology are for identification only and do not imply official endorsement. ===== There are many questions on the web that are either outdated or wrongly answered. I am trying here to filter all those questions and provide you with a nice tool to practice the exam similar to the real-life exam as much as possible. This small app was designed with love to help you 5 things: 1. question content is updated monthly in 2026, so you don’t have to worry that these question is outdated anymore. 2. With 2 EXACT-FILTERING features, you can focus easily on questions you are making mistakes or missing. 3. Save difficult questions offline. So you can practice them later when you have free time. 4. Examination mode will help you take test like a real exam. So you will be more confident. 5. 100% question are packed with straightforward explanations. You will know why it is correct or wrong. No more confusing. In sum, this app is simple and straight-to-the-point like description you are reading. Have fun and enjoy the app!

SQLPrep helps data analyst candidates practice SQL in the minutes between real responsibilities. Work through daily multiple-choice drills, then write real queries against bundled SQLite databases. Every exercise runs locally on your device, so practice is fast, private, and available without an account or internet connection. What you can practice: - SELECT, WHERE, ORDER BY, and LIMIT - Aggregate functions, GROUP BY, and HAVING - JOIN basics and advanced JOIN patterns - Subqueries, CASE, and NULL handling - Window functions - Mixed interview-style SQL problems SQLPrep is built for focused interview preparation. It avoids streak pressure, mascots, ads, subscriptions, and account setup. Instead, you get a local practice log, chapter accuracy percentages, structured query diagnostics, and a clean dark interface designed for serious study. Free practice includes Chapter 1, the first 5 SQLite exercises, and a daily quiz allowance. Unlock Full Practice Library is a one-time purchase that unlocks the full local bank: 200 interview questions and 60 SQLite exercises. No subscription. Download SQLPrep and run your first real query in under a minute — no account, no internet required.