PDII Exam Dumps | A developer is building a Lightning web component that searches for Contacts. The component must communicate

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Question 12/94

A developer is building a Lightning web component that searches
for Contacts. The component must communicate the search
results to other unrelated Lightning web components, that are in
different DOM trees, when the search completes.
What should the developer do to implement the communication?

A. Fire an application event.

B. Publish an event on an event channel.

C. Fire a custom component event.

D. Publish a message on a message channel.

Correct Answer: D

For communication between unrelated Lightning web components that are in different DOM trees, the most suitable approach is to use the Lightning Message Service (LMS). This service allows components to communicate with each other using a message channel, which is particularly useful when the components are not in the same containment hierarchy. By publishing and subscribing to messages on a message channel, components can exchange data and notifications, which is ideal for the scenario described.
References:
Lightning Web Components Developer Guide - Communicate Across the DOM with Lightning Message Service

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