Locked In: Prep for Data+

Locked-In is a focused, offline study companion for the CompTIA Data+ (DA0-001) certification exam. Every objective is broken into short lessons you can finish in a few minutes, so you make real progress between meetings, on a commute, or before bed. WHAT YOU GET All 5 exam domains Concepts and Environments, Data Mining, Data Analysis, Visualization, and Governance, Quality and Controls — each taught in plain language with visual diagrams for schemas, ETL and ELT pipelines, joins, confusion matrices, and dashboards. 335 practice questions A full question bank organized by domain and difficulty, every one with a clear explanation so you learn why an answer is right, not just that it is. Scenario performance-based questions PBQ-style items that mirror the applied, scenario-driven questions on the real exam. Full timed mock exam Sit a complete 60-question, 90-minute exam under realistic conditions. Flag questions for review, then check a final review screen before you score. Flashcards and a searchable glossary A deck of must-know terms plus a glossary you can search any time a definition slips your mind. Spaced repetition Cards you miss come back on a smart schedule so weak spots turn into strengths. Progress tracking Completion by domain, quiz history, study streaks, bookmarks, and personal notes — so you always know what to study next. FREE TO TRY Domain 1's first topic is fully free, plus a preview lesson from every other domain. A single one-time purchase of $9.99 unlocks every lesson, the full question bank, all flashcards, scenario PBQs, and the timed mock exam. No subscription. No ads. No account. PRIVATE BY DESIGN Locked-In collects no personal data. There are no third-party analytics or trackers, and everything runs on your device. Your progress stays with you. Not affiliated with, endorsed by, or sponsored by CompTIA. CompTIA and Data+ are registered trademarks of CompTIA, Inc.