Top Data Warehouse Interview Questions
The data warehouse is the most secure storage system of any information for the business or the organization. This data warehouse works as the library of the historical data that can be analyzed or retrieved as per the requirements of the business to perform decision making. In this Data Warehouse Interview Questions article, we have consolidated the list of all the common questions that most companies usually ask during their session of interviews. We highly recommend you go through every question twice before going to the Data warehouse job interview. You don’t need to go anywhere for finding the answers, we have listed them as well for your convenience.
Most Frequently Asked Data Warehouse Interview Questions
In the data warehouse, a snowflake schema is the variation of the star schema. It is the form of dimensional modeling where dimensions are being stored in multiple related dimension tables. It is majorly used to improve the performance of certain queries.
A real-time data warehouse collects, cleanses, stores transforms, and circulates the information in real-time. Benefits of a real-time data warehouse:
- Faster Decisions
- Faster Recovery
- No Batch Windows
- Optimization
- Ideal Data Load
| ER Modelling | Dimensional Modelling |
|---|---|
| It supports OLTP | It supports OLAP |
| ER Modelling is always normalized | Dimensional Modelling is always denormalized |
| It removes the redundancy. | It permits redundancy. |
| This model for organization or enterprise is very hard for people to visualize and keep in their heads | This model is very easy to understand. |
This is it! We came to the end of this blog on the Data Warehouse Interview Questions. We hope you found this one helpful and are now feeling more confident about your upcoming interviews. If you think we are missing out on something, do not hesitate to tell us. Do share your feedback in the comments section.
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