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Job Interview Questions and Answers Directory

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Message Queues & Streaming Hard system-design

Q1. What is the transactional outbox pattern and why is it needed?

A service often must both change its database and publish an event. Writing to the database and then to the broker is a dual write: a crash between the two loses the even...

1 Answer

Microservices Hard system-design

Q2. How do you handle a distributed transaction without two-phase commit?

Two-phase commit is rarely used in microservices because it needs a coordinating transaction manager, holds locks across services, blocks on coordinator failure and hurts...

1 Answer