Question: what are the interview questions for etl testing?
Answer:  What is ETL? ... 
 Explain what are the ETL testing operations includes? ... 
 Mention what are the types of data warehouse applications and what is the difference between data mining and data warehousing? ... 
 What are the various tools used in ETL? ... 
 What is fact? ... 
 Explain what are Cubes and OLAP Cubes?