What are the main differences in reliability between Pub/Sub and SQS?
Pub/Sub offers high availability and durability, while SQS provides message queuing with at-least-once delivery. Both have their strengths.
Can you explain how message delivery works in both systems?
In Pub/Sub, messages are pushed to subscribers, ensuring real-time delivery. SQS uses a polling mechanism where consumers pull messages.
Which one would you recommend for a critical application?
For critical applications, SQS might be preferable due to its guaranteed delivery and message retention features.
Are there any scenarios where Pub/Sub is a better choice?
Yes, if you need real-time processing and can handle eventual consistency, Pub/Sub is excellent for event-driven architectures.
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