Data Processing ETL and Data Transformation 2

Question 1

What is data aggregation in ETL transformation?

Accepted Answer

Combining multiple values into a single summary value such as a sum or average

Answer

Data aggregation summarizes detailed records into higher-level values, such as computing daily totals from individual transaction records.

Question 2

What is a data pipeline?

Accepted Answer

A series of automated steps that move and transform data from source to destination

Answer

A data pipeline is an automated series of processes that ingests, transforms, and delivers data from source systems to target destinations.

Question 3

What does data enrichment mean in the context of ETL?

Accepted Answer

Enhancing source data by adding additional information from other sources

Answer

Data enrichment augments existing records by appending additional relevant attributes from external or reference data sources during transformation.

Question 4

Which tool is widely used in the US enterprise environment for building ETL workflows visually?

Accepted Answer

Apache Informatica PowerCenter

Answer

Informatica PowerCenter is a leading enterprise ETL platform in the US that provides a visual interface for designing, deploying, and managing data integration workflows.

Question 5

What is a slowly changing dimension (SCD) in data warehousing?

Accepted Answer

A dimension table whose attribute values change slowly over time

Answer

A slowly changing dimension describes how to handle attributes in a dimension table that change infrequently, such as a customer's address or job title.

Data Processing Practice Test

Data Processing Practice Test

Data Processing ETL and Data Transformation 2