Key points

• Lambda runs bounded event-driven ingestion, transformation, API, and pipeline-control code without server provisioning.
• Concurrency, retries, idempotency, packaging, execution roles, and downstream capacity remain explicit design concerns.

Best-known use cases

• Transform small records when S3 objects or stream events arrive.
• Run event-driven pipeline control tasks without provisioning servers.
• Expose lightweight ingestion logic behind an API.

What candidates often confuse it with

• Lambda suits short stateless handlers; Flink retains stream state and container or distributed platforms fit longer processing.

Key takeaway

Choose Lambda for bounded event-driven work whose runtime and resource needs fit the serverless function model.

Relevant exam tasks

• D1.1 — Task 1.1: Perform data ingestion
• 1.1.2 — Read data from batch sources (for example, Amazon S3, AWS Glue, Amazon EMR, AWS DMS, Amazon Redshift, AWS Lambda, Amazon AppFlow).
• 1.1.7 — Call a Lambda function from Kinesis.
• D1.2 — Task 1.2: Transform and process data
• 1.2.5 — Implement data transformation services based on requirements (for example, Amazon EMR, AWS Glue, Lambda, Amazon Redshift).
• D1.3 — Task 1.3: Orchestrate data pipelines
• 1.3.1 — Use orchestration services to build workflows for data ETL pipelines (for example, Lambda, EventBridge, Amazon Managed Workflows for Apache Airflow [Amazon MWAA], AWS Step Functions, AWS Glue workflows).
• D1.4 — Task 1.4: Apply programming concepts
• 1.4.2 — Configure Lambda functions to meet concurrency and performance needs.
• 1.4.6 — Use AWS SAM to package and deploy serverless data pipelines (for example, Lambda functions, Step Functions, DynamoDB tables).
• D3.1 — Task 3.1: Automate data processing by using AWS services
• 3.1.3 — Call SDKs to access Amazon features from code.
• 3.1.8 — Use AWS Lambda to automate data processing.
• D4.1 — Task 4.1: Apply authentication mechanisms
• 4.1.4 — Set up IAM roles for access (for example, AWS Lambda, Amazon API Gateway, AWS CLI, AWS CloudFormation).

Learn more

• DEA-C01 in-scope services
• DEA-C01 Domain 1: Data Ingestion and Transformation
• DEA-C01 Domain 3: Data Operations and Support
• DEA-C01 Domain 4: Data Security and Governance