When a query parameter is mapped to a "Dashboard Parameter," it creates a control at the dashboard level. Any change to this dashboard parameter's value will be passed to the underlying query, causing the associated visualization (the area chart) to refresh with new data. The primary benefit of this feature is that the same dashboard parameter can be linked to multiple visualizations on the dashboard. Therefore, changing the value in the single dashboard parameter control will simultaneously update the area chart and all other visualizations that are also linked to that same parameter, providing a unified and interactive dashboard experience.

A: This is incorrect because other visualizations on the dashboard can also be linked to the same dashboard parameter and will update accordingly.

C: This is incorrect. The value is not static; the purpose of a dashboard parameter is to allow users to dynamically change the value after the chart has been added.

D: This is incorrect. A dashboard parameter is explicitly designed to be interactive and changeable by the end-user viewing the dashboard.

E: This is a nonsensical statement. A visualization (the area chart) is an object that displays data; it does not convert into a parameter, which is a control element.

1. Databricks Documentation

"Dashboard parameters": This document explains the functionality of dashboard parameters. It states

"You can link parameters to create a filter for your dashboard. For example

you can create a dashboard-level filter that lets users select from a list of values. When a value is selected

the visualizations on the dashboard are updated to reflect the selected value." This supports the idea that a single dashboard parameter updates all linked visualizations.

2. Databricks Documentation

"Use parameters in dashboards": This guide details the process. It shows how to "Add a widget that uses a query parameter" and then configure it to use a "New dashboard parameter" or an "Existing dashboard parameter." The ability to link to an "Existing dashboard parameter" confirms that multiple widgets (visualizations) can be controlled by the same parameter. The documentation states

"When you link parameters in this way

a change in the source parameter selection widget causes the linked queries to rerun using the new value." This directly supports option B.