To flatten the parent-child hierarchy in an Employees table, which two DAX functions should you use?

The correct choice is based on the DAX function PATH and its ability to deal with hierarchical data, particularly in parent-child scenarios. The function EXCEPTPATH is designed to extract the full path of a specific node in a parent-child hierarchy. By utilizing EXCEPTPATH, you can effectively flatten this structure into a more manageable format, allowing for easier analysis and reporting in Power BI.

EXCEPTPATH operates by providing a series of parent child relationships, which becomes crucial when attempting to analyze such hierarchies. When you apply this function in combination with other functions meant to manipulate or aggregate data, you can achieve a flattened view of the hierarchy, making it simpler to conduct operations on or visualize the data.

The other functions listed do not specifically address the needs related to dealing with parent-child hierarchies in the same effective manner. While functions like PATHCROSSJOIN, EXCEPT PATHITEM, and PATHITEM CROSSJOIN may serve distinct purposes within DAX, they are not tailored to flattening parent-child hierarchies, which is the primary objective of the given question. Thus, EXCEPTPATH stands out as the appropriate choice for this specific task in Power BI.