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Opal Security interview questions

Explore questions associated with Opal Security. Review the source details, then use the workspace for code, notes, and diagrams.

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System design

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System designDifficulty not specified
Design a Publisher-Subscriber Message queue
Design a message queue system that enables multiple publishers to send messages to topics and multiple subscribers to consume messages, ensuring at-most-once delivery guarantee.
Companies: Opal Security, Amazon, Anchorage Digital, Ethos
Last reported May 2026
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