How to Pass the AWS Data Engineer (DEA-C01)
Build and manage data pipelines at scale.
Ingestion, transformation, governance — the DEA-C01 tests your ability to move data reliably and securely. We train the pipeline decisions that trip up even experienced engineers.
Exam Fee
$150
Questions
65
Duration
170 min
Pass Score
72%
DEA-C01 scores constraint extraction more than service knowledge
The Data Engineer Associate exam spans data ingestion and transformation, storage design, operations and support, and security and governance. In every domain, questions embed the governing constraint in a specific phrase: "minimize operational overhead," "near-real-time," "cost-optimized for infrequent access," or "least privilege." Candidates who over-invest in service recognition and skip constraint extraction select architecturally sound but contextually wrong answers. The exam is designed so that the distractors are plausible service choices that fail a constraint clause the question stated explicitly.
Full Certification Title
AWS Certified Data Engineer – Associate
Exam Domains
Top Traps by Frequency
Choose between a serverless ETL service (AWS Glue) and a managed-cluster service (Amazon EMR) when data volume and transformation complexity are moderate and th...
When a pipeline is short, linear, and lacks complex DAG requirements or cross-team scheduling needs, choose serverless-native orchestration over a managed Airfl...
Choose between serverless managed ETL (AWS Glue) and managed-cluster processing (Amazon EMR) when transformation logic is standard and the team has no capacity ...
Whether the workload's per-invocation payload size and execution duration fit within Lambda's operational ceiling, making Lambda+SAM strictly preferable to EMR ...
Choose between a streaming delivery pipeline (Kinesis Data Firehose) that is fully managed on the delivery side but requires a self-managed producer for SaaS so...
When event-driven file payloads and execution durations fit within Lambda's constraints (15 min, 10 GB), choose Lambda deployed via SAM over EMR to satisfy the ...
Top Patterns by Frequency
Choose between a streaming delivery pipeline (Kinesis Data Firehose) that is fully managed on the delivery side but requires a self-managed producer for SaaS so...
Choose between a serverless ETL service (AWS Glue) and a managed-cluster service (Amazon EMR) when data volume and transformation complexity are moderate and th...
Select the log collection and query layer that satisfies end-to-end observability for an infrequent, event-driven pipeline workload without provisioning persist...
Select the observability layer that matches the audit requirement: CloudTrail captures control-plane API events required for compliance, while CloudWatch Logs c...
Determine whether column-level access restrictions (Lake Formation) satisfy the HIPAA requirement for irreversible PII masking before cross-account sharing, or ...
Whether data-transformation masking (Glue DataBrew recipe writing an anonymized output) or query-time access restriction (Lake Formation column permissions) sat...
Training Methodology
CloudReflex uses adaptive micro-scenario training that target your specific weakness profile. Each session adapts difficulty based on your accuracy, focusing on the traps and patterns where you lose the most points.
Learn more about the methodology →Ready to train for the DEA-C01?
200 scenario questions. Pattern recognition and trap analysis. $12.99 one-time, lifetime access.