Nielsen Lead Data Engineer Interview Questions and Answers

Design ETL process to ensure high data quality by implementing data validation, cleansing, and transformation steps.

• Identify data sources and define data extraction methods

• Implement data validation checks to ensure accuracy and completeness

• Perform data cleansing to remove duplicates, errors, and inconsistencies

• Transform data into a consistent format for analysis and reporting

• Utilize tools like Apache NiFi, Talend, or I