Data Warehousing Questions and Answers
Data Warehousing questions with answers are essential for candidates preparing for technical aptitude and database-related competitive exams. In a data warehouse, large volumes of data are stored, integrated, and analyzed to support business decisions — making it a key topic in placement tests and IT interviews. This section covers aptitude questions and answers with explanations that focus on ETL processes, OLAP, data marts, and warehouse architecture. Practicing these data warehousing aptitude questions with solutions PDF will help you understand core concepts and improve accuracy for exams conducted by companies like TCS, Infosys, and Accenture. Whether you are preparing for campus placements or a professional certification, these data warehousing questions provide a perfect foundation for success.
Concepts and practices of data warehousing solutions. Pair with data mining data warehouse and database system architecture
Data Warehousing
11. The load and index is which of the following?
- A process to reject data from the data warehouse and to create the necessary indexes
- A process to load the data in the data warehouse and to create the necessary indexes
- A process to upgrade the quality of data after it is moved into a data warehouse
- A process to upgrade the quality of data before it is moved into a data warehouse
12. The extract process is which of the following?
- Capturing all of the data contained in various operational systems
- Capturing a subset of the data contained in various operational systems
- Capturing all of the data contained in various decision support systems
- Capturing a subset of the data contained in various decision support systems
13. A star schema has what type of relationship between a dimension and fact table?
- Many-to-many
- One-to-one
- One-to-many
- All of the above.
14. Transient data is which of the following?
- Data in which changes to existing records cause the previous version of the records to be eliminated
- Data in which changes to existing records do not cause the previous version of the records to be eliminated
- Data that are never altered or deleted once they have been added
- Data that are never deleted once they have been added
15. A multifield transformation does which of the following?
- Converts data from one field into multiple fields
- Converts data from multiple fields into one field
- Converts data from multiple fields into multiple fields
- All of the above