Answer
Event emitters allow modules to emit events and let other parts of the app listen and react. It supports decoupled communication between components.
Quick Answer
EventEmitter is Node.js's built-in pub-sub mechanism. Objects that extend EventEmitter can emit named events (emitter.emit('data', value)) and listeners can subscribe (emitter.on('data', handler)). Many Node.js core modules (streams, http server, child processes) are EventEmitters. It's the foundation of event-driven architecture in Node.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ