Answer
Pub/Sub: Publisher sends events to multiple subscribers.
Message Queue: Messages are consumed by one or more consumers.
Both enable async processing and load leveling.
Quick Answer
Pub/sub: publisher sends to a topic, multiple subscribers receive copies independently. One-to-many broadcast. Queue (point-to-point): message goes to one consumer in a group, processed once. Load balances work across consumers. Most systems use both: Kafka topics with consumer groups give pub/sub semantics plus competing consumer load balancing in the same system.
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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