AWS DEA-C01: What Each Domain Actually Tests (Not What the Blueprint Says)

Short summary

AWS DEA-C01 exam tests scenario-based decision-making across four domains: data ingestion/transformation (Kinesis, Glue, EMR), storage management (Redshift, S3 partitioning), operations (Step Functions, CloudWatch, Glue bookmarks), and security (Lake Formation, IAM, KMS). The exam prioritizes architectural decisions over trivia—key distinctions include Kinesis Streams vs. Firehose and proper data lake partitioning strategies. Effective prep requires domain-weighted study with heavy emphasis on scenario-based practice rather than flashcards.

• •Exam tests scenario-based architectural decisions across four weighted domains: ingestion, storage, operations, and security
• •Critical distinctions: Kinesis Streams vs. Firehose, S3 partitioning strategies, Lake Formation fine-grained permissions
• •Most effective prep: weighted domain study with extensive scenario practice; flashcards are ineffective for decision exams

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