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Amazon Data-Engineer-Associate Exam Syllabus Topics:

SectionWeightObjectives
Data Store Management26%- Understand data cataloging
  • 1. AWS Glue Data Catalog
  • 2. Data discovery and classification
  • 3. Schema evolution
- Design data models
  • 1. Schema design
  • 2. Normalization and denormalization
  • 3. Partitioning and indexing strategies
- Manage data lifecycle
  • 1. Data retention policies
  • 2. Data archiving
  • 3. Amazon S3 storage classes
- Choose a data store
  • 1. Data characteristics (structured, semi-structured, unstructured)
  • 2. Amazon S3, Amazon RDS, Amazon DynamoDB, Amazon Redshift
  • 3. Access and storage patterns
  • 4. Data lakes vs. data warehouses
Data Security and Governance18%- Manage data privacy and compliance
  • 1. Data masking and tokenization
  • 2. PII data handling
  • 3. AWS Lake Formation permissions
- Ensure data encryption
  • 1. AWS KMS
  • 2. Encryption at rest and in transit
- Apply authentication and authorization
  • 1. Service control policies (SCPs)
  • 2. Amazon S3 bucket policies
  • 3. AWS IAM policies and roles
- Implement data quality checks
  • 1. Data validation
  • 2. AWS Glue DataBrew
Data Operations and Support22%- Manage and troubleshoot data processes
  • 1. Cost optimization
  • 2. Performance tuning
  • 3. Debugging failed jobs
- Monitor data pipelines
  • 1. Logging and metrics
  • 2. Amazon CloudWatch
  • 3. AWS CloudTrail
- Automate data pipelines
  • 1. Scheduling jobs
  • 2. AWS Lambda triggers
  • 3. Event-driven triggers
Data Ingestion and Transformation34%- Apply programming concepts
  • 1. Infrastructure as Code (IaC)
  • 2. Version control
  • 3. SQL, Python, Scala
- Transform and process data
  • 1. Data transformation services (AWS Glue, Amazon EMR, AWS Lambda)
  • 2. Data partitioning and compression
  • 3. ETL/ELT patterns
  • 4. Batch and stream processing
- Perform data ingestion
  • 1. Streaming data ingestion
  • 2. Batch data ingestion (scheduled ingestion, event-driven ingestion)
  • 3. Data ingestion patterns (frequency and data history)
  • 4. Replayability of data
  • 5. Throughput and latency characteristics for AWS services
- Orchestrate data pipelines
  • 1. Amazon Managed Workflows for Apache Airflow (MWAA)
  • 2. AWS Glue Workflows
  • 3. Event-driven architectures
  • 4. AWS Step Functions

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Amazon AWS Certified Data Engineer - Associate (DEA-C01) Sample Questions (Q280-Q285):

NEW QUESTION # 280
A company has three subsidiaries. Each subsidiary uses a different data warehousing solution. The first subsidiary hosts its data warehouse in Amazon Redshift. The second subsidiary uses Teradata Vantage on AWS. The third subsidiary uses Google BigQuery.
The company wants to aggregate all the data into a central Amazon S3 data lake. The company wants to use Apache Iceberg as the table format.
A data engineer needs to build a new pipeline to connect to all the data sources, run transformations by using each source engine, join the data, and write the data to Iceberg.
Which solution will meet these requirements with the LEAST operational effort?

Answer: D

Explanation:
Amazon Athena provides federated query connectors that allow querying multiple data sources, such as Amazon Redshift, Teradata, and Google BigQuery, without needing to extract the data from the original source. This solution is optimal because it offers the least operational effort by avoiding complex data movement and transformation processes.
Amazon Athena Federated Queries:
Athena's federated queries allow direct querying of data stored across multiple sources, including Amazon Redshift, Teradata, and BigQuery. With Athena's support for Apache Iceberg, the company can easily run a Merge operation on the Iceberg table.
The solution reduces complexity by centralizing the query execution and transformation process in Athena using SQL queries.
Reference:
Alternatives Considered:
A (AWS Glue pipeline): This would work but requires more operational effort to manage and transform the data in AWS Glue.
C (Amazon EMR): Using EMR and writing PySpark code introduces more operational overhead and complexity compared to a SQL-based solution in Athena.
D (Amazon AppFlow): AppFlow is more suitable for transferring data between services but is not as efficient for transformations and joins as Athena federated queries.
Amazon Athena Documentation
Federated Queries in Amazon Athena


NEW QUESTION # 281
A company is setting up a new Amazon SageMaker Unified Studio domain. Each of the company ' s business units needs isolated control over its own assets, projects, and metadata. Specific datasets must be shareable with other business units upon approval. The company also requires centralized user authentication and identity mapping.
Which solution will meet these requirements?

Answer: D

Explanation:
Option D is correct because domain units in Amazon SageMaker Unified Studio are specifically designed to organize assets and other domain entities by business unit or team, while also enabling delegated authority to domain unit owners for authorization and governance. AWS states that domain units let selected users within each business unit log in and share assets to the catalog, and that users elsewhere in the enterprise can discover those assets and request access. This directly matches the requirement for isolated control with controlled cross-business-unit sharing upon approval. AWS also documents that Unified Studio supports authentication through AWS IAM Identity Center, which satisfies the need for centralized authentication and identity mapping.
Option A is incorrect because API keys are not the correct authentication model for Unified Studio portal access; AWS documents IAM Identity Center and related identity-provider-based sign-in instead. Option B is wrong because it prevents the required approved sharing. Option C is less suitable because the requirement is to isolate business units within a domain while still enabling governed sharing; separate domains would add more separation than needed and complicate sharing. Therefore, one domain with separate domain units, IAM Identity Center, and access-request-based sharing is the best fit.


NEW QUESTION # 282
A company uses Amazon S3 to store semi-structured data in a transactional data lake. Some of the data files are small, but other data files are tens of terabytes.
A data engineer must perform a change data capture (CDC) operation to identify changed data from the data source. The data source sends a full snapshot as a JSON file every day and ingests the changed data into the data lake.
Which solution will capture the changed data MOST cost-effectively?

Answer: C

Explanation:
An open source data lake format, such as Apache Parquet, Apache ORC, or Delta Lake, is a cost-effective way to perform a change data capture (CDC) operation on semi-structured data stored in Amazon S3. An open source data lake format allows you to query data directly from S3 using standard SQL, without the need to move or copy data to another service. An open source data lake format also supports schema evolution, meaning it can handle changes in the data structure over time. An open source data lake format also supports upserts, meaning it can insert new data and update existing data in the same operation, using a merge command. This way, you can efficiently capture the changes from the data source and apply them to the S3 data lake, without duplicating or losing any data.
The other options are not as cost-effective as using an open source data lake format, as they involve additional steps or costs. Option A requires you to create and maintain an AWS Lambda function, which can be complex and error-prone. AWS Lambda also has some limits on the execution time, memory, and concurrency, which can affect the performance and reliability of the CDC operation. Option B and D require you to ingest the data into a relational database service, such as Amazon RDS or Amazon Aurora, which can be expensive and unnecessary for semi-structured data. AWS Database Migration Service (AWS DMS) can write the changed data to the data lake, but it also charges you for the data replication and transfer. Additionally, AWS DMS does not support JSON as a source data type, so you would need to convert the data to a supported format before using AWS DMS. Reference:
What is a data lake?
Choosing a data format for your data lake
Using the MERGE INTO command in Delta Lake
[AWS Lambda quotas]
[AWS Database Migration Service quotas]


NEW QUESTION # 283
A company uses an Amazon Redshift cluster that runs on RA3 nodes. The company wants to scale read and write capacity to meet demand. A data engineer needs to identify a solution that will turn on concurrency scaling.
Which solution will meet this requirement?

Answer: A

Explanation:
Concurrency scaling is a feature that allows you to support thousands of concurrent users and queries, with consistently fast query performance. When you turn on concurrency scaling, Amazon Redshift automatically adds query processing power in seconds to process queries without any delays. You can manage which queries are sent to the concurrency-scaling cluster by configuring WLM queues. To turn on concurrency scaling for a queue, set the Concurrency Scaling mode value to auto. The other options are either incorrect or irrelevant, as they do not enable concurrency scaling for the existing Redshift cluster on RA3 nodes.
References:
* Working with concurrency scaling - Amazon Redshift
* Amazon Redshift Concurrency Scaling - Amazon Web Services
* Configuring concurrency scaling queues - Amazon Redshift
* AWS Certified Data Engineer - Associate DEA-C01 Complete Study Guide (Chapter 6, page 163)


NEW QUESTION # 284
A retail company needs to implement a solution to capture data updates from multiple Amazon Aurora MySQL databases. The company needs to make the updates available for analytics in near real time. The solution must be serverless and require minimal maintenance.
Which solution will meet these requirements with the LEAST operational overhead?

Answer: B

Explanation:
Option D is correct because Aurora zero-ETL integration with Amazon Redshift is the AWS-managed feature built specifically to make transactional Aurora data available in Amazon Redshift Serverless in near real time.
AWS documents that Aurora zero-ETL is a fully managed solution that makes transactional data available in the analytics destination after it is written to the Aurora cluster, eliminating the need to build and maintain complex ETL pipelines. AWS also states that Redshift zero-ETL supports a target data warehouse that can be a Redshift Serverless workgroup, which directly matches the question.
Option A and C add more operational components, such as DMS tasks, replication design, schema handling, and additional streaming infrastructure. Option B is also more operationally heavy because MSK Connect with Debezium requires Kafka-based CDC infrastructure and connector management. Since the requirement emphasizes serverless, near real-time analytics, and least operational overhead, the native zero-ETL integration is the best fit. This also aligns with the study guide's focus on choosing AWS services that minimize management effort while supporting ingestion and analytics workflows.


NEW QUESTION # 285
......

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