Senior ETL Developer Interview Questions and Answers

Temporary tables are session-specific while global temporary tables are accessible across sessions.

• Temporary tables are created in a user's temporary tablespace and are automatically dropped at the end of the session.

• Global temporary tables are created in a user's temporary tablespace but are not automatically dropped at the end of the session.

• Temporary tables are only accessible within the session that created them.

• Global temporary tables can be accessed by multiple sessions...read more

Functions return a single value while stored procedures can return multiple values and perform complex operations.

• Functions are used to perform a single operation and return a single value.

• Stored procedures can perform complex operations and return multiple values.

• Functions can be used in SQL statements while stored procedures cannot.

• Functions are faster than stored procedures as they do not require compilation.

• Stored procedures can be used to execute a series of SQL statemen...read more

IICS is a cloud-based integration platform while PC is a data integration tool for on-premise systems.

• IICS stands for Informatica Intelligent Cloud Services

• It is a cloud-based integration platform that allows users to integrate data from various sources

• PC stands for PowerCenter

• It is a data integration tool for on-premise systems

• PC can extract data from various sources, transform it, and load it into a target system

• Both IICS and PC are used for data integration and ETL process...read more

SSIS packages can be complex and difficult to troubleshoot.

• Debugging can be time-consuming and challenging.

• SSIS packages can be resource-intensive and slow down other processes.

• Version control can be difficult to manage.

• SSIS packages may not be suitable for real-time data integration.

• SSIS packages may require additional licensing costs for advanced features.