How do parent and child components communicate in LWC?

Direct Answer

Parents pass data down through public properties, and children communicate up by dispatching custom events.

Detailed Explanation

A stronger answer adds that component communication should stay explicit and predictable. It may also mention pub-sub or message service patterns for sibling or broader communication scenarios.

Why the Interviewer Asks This

The interviewer is testing component design fundamentals.

Weak Answer Warning

A weak answer lists decorators without explaining the flow of communication.

Stronger Answer Direction

Focus on data down, events up, and when broader patterns are needed.

Follow-up Question

How would you coordinate communication between unrelated components?