The complete AWS Certified Data Engineer – Associate study library — 17 lessons mapped to every domain and topic in the official exam guide. Free to read, no account needed.
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AWS publishes exactly what the DEA-C01 tests and how much each part is worth. Here it is — every domain, its weight, the topics inside it, and the lessons that cover them.
Ingesting streaming and batch data, transforming and processing it, orchestrating ETL pipelines, and applying programming concepts. Official weighting 34%.
Choosing and configuring data stores, cataloging data, managing data lifecycle, and designing data models with schema evolution. Official weighting 26%.
Automating data processing, analyzing data, maintaining and monitoring pipelines, and ensuring data quality. Official weighting 22%.
Applying authentication and authorization, encrypting and masking data, preparing audit logs, and managing data privacy and governance. Official weighting 18%.
Reading every note front to back is the slowest way to pass. The exam is weighted, so your revision should be too — the blueprint above tells you exactly where the marks are.
Data Ingestion and Transformation carries the most marks on the DEA-C01, so it earns the most of your attention. Work down the blueprint from the heaviest domain to the lightest rather than starting at domain 1 and grinding forward.
Read each lesson once without stopping to memorise — you are building a map, not a memory. On the second pass, read only the "what's tested" and key-takeaway blocks. If a takeaway surprises you, that lesson goes back on the pile.
Cover a lesson's key takeaways and try to say them out loud from the heading alone. Recall you can produce under your own steam is the only recall that survives a timed exam; recognition on a re-read is not the same thing.
Finishing the notes is not the goal — scoring is. Move to DEA-C01 practice questions early, then come back to the exact lessons your wrong answers point at. That loop is worth far more than a third read-through.