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Q: Explain the core components of RabbitMQ architecture.

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Q: What are the different types of exchanges in RabbitMQ?

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Q: What is the difference between a queue and an exchange?

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Q: What are bindings in RabbitMQ?

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Q: What is the difference between temporary and durable queues?

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Q: Explain message acknowledgments in RabbitMQ.

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Q: What is message durability and persistence?

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Q: What are the different routing patterns in RabbitMQ?

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Q: How do you implement a work queue pattern?

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Q: What is the purpose of prefetch count (QoS)?

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Explain the core components of RabbitMQ architecture.

beginner

Core components:

Producer: Application that sends messages
Exchange: Routes messages to queues based on routing rules
Queue: Buffer that stores messages until they're consumed
Consumer: Application that receives and processes messages
Broker: The RabbitMQ server instance
Virtual Host (vhost): Logical separation within a broker
Connection: TCP connection between application and broker
Channel: Virtual connection within a TCP connection

What are the different types of exchanges in RabbitMQ?

beginner

Four main exchange types:

Direct Exchange: Routes messages based on exact routing key match
- Message routing key must exactly match queue binding key
- Used for unicast routing
Fanout Exchange: Routes messages to all bound queues, ignoring routing key
- Broadcasts messages to all queues
- Used for publish/subscribe patterns
Topic Exchange: Routes messages based on wildcard patterns in routing keys
- Uses patterns with * (one word) and # (zero or more words)
- Example: stock.*.price matches stock.usd.price
Headers Exchange: Routes based on message headers instead of routing key
- Matches header attributes using "all" or "any" logic

What is the difference between a queue and an exchange?

beginner

Queue:

Stores messages until they're consumed
Messages are delivered to consumers from queues
Has properties like durability, exclusivity, and auto-delete
FIFO (First In, First Out) message delivery
Exchange:
Routes messages to appropriate queues
Doesn't store messages (except in rare error cases)
Determines message delivery based on routing rules
Receives messages from producers and forwards to queues
Key difference: Exchanges are routing mechanisms, while queues are storage mechanisms.

What are bindings in RabbitMQ?

beginner

Bindings are rules that define the relationship between exchanges and queues. They tell the exchange which queues should receive messages based on routing criteria.
Components of a binding:

Queue: The destination queue
Exchange: The source exchange
Routing key: Pattern used for routing (for direct and topic exchanges)
Arguments: Additional parameters for complex routing

# Example: Bind queue to exchange with routing key
rabbitmqctl bind_queue exchange_name queue_name routing_key