System Design – Message Queues
Practice system design interview questions focused on message queues. Cover async processing, decoupling services, retries, and common queue patterns. Answer questions and receive feedback on trade-offs and clarity. Ideal for software engineer system design prep. First 2 questions are free with full feedback.
- Level Intermediate
- Questions 12
Try any track free — first 2 questions include full AI feedback. Subscribe to finish the track and unlock everything. Type or speak your answer — the first 2 questions include scoring and detailed AI feedback.
Sample system design – message queues interview questions
Preview 6 questions from this track in quiz order. In the full quiz you answer one at a time — type or speak — then get a score and feedback.
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What is a message queue and why would you use one?
What a strong answer includes
Decouples services and handles async work.
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Explain the difference between a queue and a pub/sub system.
What a strong answer includes
Queue is point-to-point; pub/sub is broadcast.
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How do you handle a failed message?
What a strong answer includes
Retries and a dead-letter queue.
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What is at-least-once vs at-most-once delivery?
What a strong answer includes
Clear trade-off between duplicates and lost messages.
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When would you use a message queue instead of a direct API call?
What a strong answer includes
Long-running tasks or traffic spikes.
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How do you prevent a queue from growing forever?
What a strong answer includes
Monitoring, scaling consumers, or backpressure.