Techpro Compsoft Power BI Developer Interview Questions and Answers

Duplicates are identical copies of data, while references are pointers to the same data in memory.

• Duplicates are exact copies of the original data.

• References point to the same data in memory.

• Duplicates can lead to inconsistencies in data analysis.

• References are more memory efficient than duplicates.

Incremental refresh in Power BI allows for loading only new or modified data to improve performance.

• Set up incremental refresh policy in Power BI Service

• Define a range of values for the refresh policy

• Use parameters to filter data based on the refresh policy

• Schedule regular refreshes to update the dataset

Power BI Report is a single report page, while Power BI App is a collection of multiple reports and dashboards.

• Power BI Report is a single page report with visualizations and data insights.

• Power BI App is a collection of multiple reports, dashboards, and datasets organized together.

• Power BI Report can be shared individually, while Power BI App is shared as a package of related content.

• Power BI App allows for more inter...read more

Row level security restricts data access at the row level based on user roles or criteria.

• Row level security limits data access to specific rows based on user roles or criteria

• It ensures that users can only see the data they are authorized to access

• Examples include restricting a sales manager to only see data for their assigned region

Schedule refresh is a feature in Power BI that automatically updates data at specified intervals.

• Allows users to set up a schedule for data refresh in Power BI Service

• Ensures that reports and dashboards always display the most up-to-date information

• Can be configured to refresh data from various data sources such as SQL databases, Excel files, etc.

Calculated columns are columns created in Power BI by using DAX formulas, while measures are calculations based on the data model.

• Calculated columns are static and stored in the data model, while measures are dynamic and calculated on the fly.

• Calculated columns are used for adding new data to a table, while measures are used for aggregating data or performing calculations.

• Examples of calculated columns include adding a...read more

Numerical range parameter is a parameter that defines a range of numerical values for a specific variable or function.

• It is used to specify a range of numerical values that a parameter can take.

• It helps in filtering data based on a specific numerical range.

• For example, a numerical range parameter can be used to filter sales data for products with prices between $50 and $100.

A field parameter is a variable that is used to pass values to a function or method.

• Field parameters are used to customize the behavior of functions or methods.

• They can be used to filter, sort, or group data in Power BI reports.

• Examples include filtering data based on a specific date range or sorting data by revenue.