AWS Step Functions coordinate distributed applications and microservices using visual workflows. As a Data Engineer, you may use Step Functions to build complex data pipelines and manage dependencies between individual steps. Explain any projects you’ve worked on involving AWS Step Functions.

13. How do you monitor AWS resources for performance and cost optimization?

LSI Keywords: AWS resource monitoring, performance optimization

Monitoring AWS resources is vital for both performance and cost optimization. You can use AWS CloudWatch, AWS Trusted Advisor, and third-party monitoring tools to track resource utilization, set up alarms, and optimize the AWS infrastructure for cost efficiency.

14. Describe your experience in using AWS Glue DataBrew for data preparation.

LSI Keywords: AWS Glue DataBrew data preparation

AWS Glue DataBrew is a visual data preparation tool that simplifies data cleaning and normalization. Share how

you’ve used DataBrew to automate data transformation tasks, handle data quality issues, and prepare data for analysis.

15. How do you ensure data integrity in a data lake on AWS?

LSI Keywords: Data integrity in AWS data lake

Data integrity is critical for a reliable data lake. Ensure data integrity by using versioning and cataloging tools, validating data during ingestion, and implementing access controls to prevent unauthorized changes.