3.0 Data Operations and Support DEA-C01 Practice Quiz
110 exam-style questions covering 22% of the DEA-C01 exam. Instant feedback on every answer, progress tracking, no signup required.
This domain is part of the AWS Certified Data Engineer Associate practice test. Each question is tagged by exam objective and difficulty so you can drill exactly the areas you need.
Sample Questions
A daily ETL pipeline has extract, validation, transform, and load steps with retries and conditional branches. Which service can coordinate these steps?
- A. AWS Step Functions
- B. Amazon DynamoDB
- C. Amazon MemoryDB for Redis
- D. Amazon SNS
Step Functions provides durable workflow state, retries, branching, and execution history for multi-step ETL orchestration. This is the correct answer.
An MWAA DAG stays queued and never starts after a deployment. What should be checked first?
- A. DAG syntax, scheduler health, worker capacity, and environment logs
- B. Amazon CloudWatch Logs
- C. Amazon SageMaker AI
- D. Amazon EMR
Queued Airflow tasks can result from parse errors, scheduler issues, insufficient workers, or execution failures that are visible in MWAA logs. This is the correct answer.
A team already maintains Airflow DAGs for dependent data jobs and wants AWS to operate the Airflow environment. Which service should they use?
- A. Amazon Aurora
- B. Amazon Managed Workflows for Apache Airflow (Amazon MWAA)
- C. Amazon SageMaker Unified Studio
- D. Amazon RDS
Amazon MWAA runs managed Apache Airflow so existing DAG-based pipeline dependencies and schedules can be operated without self-managing Airflow infrastructure. This is the correct answer.
A Step Functions execution fails on a Glue job task and retries do not occur. What should the engineer inspect?
- A. Amazon DynamoDB Streams
- B. State machine error handling, Retry configuration, and task error names
- C. Amazon SageMaker Unified Studio
- D. Amazon Kinesis Data Firehose
Step Functions retries only when configured errors match the task failure, so the state definition and failure name must be reviewed. This is the correct answer.
A Lambda function needs to write items to DynamoDB after cleaning records. Which coding approach is appropriate?
- A. AWS DMS
- B. Use the AWS SDK to call DynamoDB PutItem or BatchWriteItem
- C. Amazon CloudWatch Logs
- D. Amazon S3
The AWS SDK provides DynamoDB APIs that Lambda code can call to write transformed records into the table. This is the correct answer.
Several AWS Glue jobs and crawlers must run as a single dependent workflow. Which feature is most direct?
- A. AWS Step Functions
- B. Amazon SageMaker Unified Studio
- C. AWS Glue workflows
- D. Amazon Managed Service for Apache Flink
AWS Glue workflows coordinate Glue jobs and crawlers with triggers, dependencies, and run visibility inside the Glue service. This is the correct answer.
An Airflow task fails because it cannot assume the role used for an AWS operation. What area should be reviewed?
- A. Amazon Redshift materialized views
- B. AWS Config
- C. MWAA execution role permissions and trust configuration
- D. Amazon CloudWatch Logs
MWAA tasks use AWS permissions assigned to the environment or task integration, so the execution role must allow the attempted operation. This is the correct answer.
A simple serverless pipeline needs to start when an event arrives and then call AWS services in sequence. Which orchestration pattern fits?
- A. AWS Lambda
- B. Amazon Keyspaces
- C. AWS Glue Data Catalog
- D. EventBridge starting a Step Functions state machine
EventBridge can route the event to Step Functions, and the state machine can coordinate the serverless data processing steps. This is the correct answer.
Key Terms in This Domain
- Amazon MWAA: Managed Apache Airflow for ML/data pipeline orchestration
- Amazon Bedrock: Fully managed access to foundation models from leading AI companies
- Amazon EMR: Managed Hadoop/Spark/Presto/Hive/Flink for big data processing
- AWS Glue DataBrew: Visual data preparation tool with no-code transformations
- Amazon Managed Service for Apache Flink: Real-time stream processing with Apache Flink
- AWS Step Functions: Serverless workflow orchestration with visual state machines
- Amazon ECS: Managed container orchestration
- AWS CodeBuild: Managed build service for compiling code and running tests
- AWS CodePipeline: Continuous delivery service for application and infrastructure updates
- Amazon Q: Generative-AI assistant for AWS operations and code
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