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of 31Explain the core components of RabbitMQ architecture.
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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
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What are the different types of exchanges in RabbitMQ?
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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.*.pricematchesstock.usd.price
- Uses patterns with
- Headers Exchange: Routes based on message headers instead of routing key
- Matches header attributes using "all" or "any" logic
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What is the difference between a queue and an exchange?
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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.
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What are bindings in RabbitMQ?
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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
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What is the difference between temporary and durable queues?
Explain message acknowledgments in RabbitMQ.
What is message durability and persistence?
What are the different routing patterns in RabbitMQ?
How do you implement a work queue pattern?
What is the purpose of prefetch count (QoS)?
How do you implement RPC (Remote Procedure Call) with RabbitMQ?
What are virtual hosts (vhosts) and why are they important?
How do you handle dead letter exchanges (DLX)?
How do you monitor RabbitMQ performance?
What are publisher confirms and how do they work?
Explain message TTL (Time To Live) in RabbitMQ.
What are the different consumer patterns in RabbitMQ?
How do you implement message priority in RabbitMQ?
What are the security features in RabbitMQ?
Explain clustering in RabbitMQ.
What are mirrored queues and how do they work?
What is flow control in RabbitMQ?
How do you handle network partitions in RabbitMQ clusters?
What are lazy queues and when should you use them?
How do you implement message deduplication?
How do you troubleshoot common RabbitMQ issues?
What is the difference between AMQP 0-9-1 and AMQP 1.0?
How do you implement circuit breaker pattern with RabbitMQ?
What are quorum queues and how do they differ from classic queues?
How do you implement message routing patterns with RabbitMQ?
What are RabbitMQ streams and when should you use them?
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RabbitMQ cheatsheet
RabbitMQ Interview Cheat Sheet
- Summary01
- Core Concepts02
- Architecture Components03
- Message Patterns04
- Exchange Types05
- Message Properties06
- Reliability Features07
- Advanced Features08
- Best Practices09
- Common Interview Questions10
- Code Examples11
- Key Metrics to Monitor12
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