Google Ventures Interview Questions and Answers

Ab Initio is a data processing tool used for ETL processes in data warehousing.

• Ab Initio architecture includes Co>Operating System, Graphical Development Environment, Enterprise Meta>Environment, and Data Profiler.

• It uses parallel processing for high performance and scalability.

• Ab Initio supports various data formats and databases for seamless integration.

• Example: Ab Initio can be used for extracting data from mu...read more

Roll up is a bottom-up approach in data mining, while scan is a top-down approach.

• Roll up involves summarizing data from detailed to summary levels.

• Scan involves analyzing data from summary to detailed levels.

• Example: Roll up would be aggregating sales data from individual transactions to monthly totals, while scan would be drilling down from monthly totals to individual transactions.