Câu 37: DP-700: Implementing Data Engineering Solutions Using Microsoft Fabric

You have a Fabric workspace that contains an eventstream named Eventstream1. Eventstream1 processes data from a thermal sensor by using event stream processing, and then stores the data in a lakehouse. You need to modify Eventstream1 to include the standard deviation of the temperature. Which transform operator should you include in the Eventstream1 logic?

1. A. Expand
2. B. Group by — đáp án hiện tại
3. C. Union
4. D. Aggregate