ETL Testing ETL Testing Tools and Automation 2

Question 1

What is the role of Apache Airflow in an ETL testing strategy?

Accepted Answer

It orchestrates ETL workflow execution and can trigger automated test tasks as pipeline steps

Answer

Apache Airflow is an ETL orchestration platform that schedules and monitors pipeline tasks; testers can embed data quality checks as Airflow DAG tasks to automate validation.

Question 2

In ETL test automation, what is 'parameterized testing'?

Accepted Answer

Testing ETL jobs with different input datasets or configuration values to verify behavior across multiple scenarios

Answer

Parameterized testing runs the same test logic with multiple input variations, increasing coverage by verifying ETL behavior across different data scenarios without duplicating test code.

Question 3

Which tool or approach is commonly used to generate large volumes of synthetic test data for ETL load testing in US data engineering teams?

Accepted Answer

Faker library or Mockaroo to generate realistic synthetic records at scale

Answer

Tools like Python's Faker library or web services like Mockaroo generate realistic synthetic data at high volumes for ETL load and stress testing without exposing real PII.

Question 4

What does CI/CD integration for ETL testing mean in practice?

Accepted Answer

Automatically executing ETL test suites on every code commit using pipelines like Jenkins or GitHub Actions

Answer

CI/CD integration triggers automated ETL test suites on every code change, providing immediate feedback and preventing defects from reaching production.

Question 5

Which type of ETL testing tool compares query results between a legacy system and a new ETL pipeline to validate migration accuracy?

Accepted Answer

Parallel run / shadow testing tool

Answer

Parallel run testing runs both old and new pipelines simultaneously and compares their outputs to validate that the new ETL produces identical results before cutover.

ETL Testing - extract, transform, load Practice Test

ETL Testing - extract, transform, load Practice Test

ETL Testing ETL Testing Tools and Automation 2