Exam AWS Certified Data Engineer - Associate DEA-C01 topic 1 question 84 discussion

Glue Workflows is for Glue job orchestration. C is for orchestration with different AWS services.

Amazon Managed Workflows for Apache Airflow (Amazon MWAA) is the best service for orchestrating complex data pipelines, especially for workloads already using Amazon EMR. Airflow is a powerful workflow orchestration tool that can be integrated with various AWS services, including EMR, to provide flexible scheduling, task dependency management, and monitoring capabilities. Using a hosted Airflow service (MWAA) can reduce administrative overhead while maintaining a familiar workflow orchestration environment.

B is not cost effective, D is only to orchestrate Glue Jobs and Crawlers within AWS Glue itself. Hence C is correct, Step functions is cost effective and can link together your different AWS services.

This is EMR not Glue workflows hence step functions EventBridge is best for event driven architecture

https://aws.amazon.com/blogs/big-data/build-a-concurrent-data-orchestration-pipeline-using-amazon-emr-and-apache-livy/

The most cost-effective AWS service for orchestrating an ETL pipeline that maximizes performance is D. AWS Glue Workflows. AWS Glue is a fully managed ETL service that makes it easy to move data between your data stores. AWS Glue simplifies and automates the difficult and time-consuming tasks of data discovery, conversion mapping, and job scheduling. AWS Glue Workflows allows you to orchestrate complex ETL jobs involving multiple crawlers, jobs, and triggers. While the other services mentioned (Amazon EventBridge, Amazon MWAA, and AWS Step Functions) can be used for workflow orchestration, they are not specifically designed for ETL workloads and may not be as cost-effective for this use case. AWS Glue is designed for ETL workloads, and its workflows feature is specifically designed for orchestrating ETL jobs, making it the most suitable and cost-effective choice.

C - becuase AWS Glue can be used only for glue based ETL jobs

While AWS Glue Workflows are excellent for orchestrating Glue-specific ETL tasks, AWS Step Functions is more suitable for orchestrating an Amazon EMR-based ETL pipeline due to its greater flexibility, broader integration capabilities, and effective cost management. Therefore, the correct choice remains [C]