A challenging system design question focused on FinOps-related topics. The design typically involves integrating with a third-party API that is initially described as reliable. However, once you build your system, the interviewer changes the requirements, revealing that the API is actually unreliable.

To handle this, the only viable solution is to introduce locking within your system and gradually transition to using transactions with ACID guarantees to ensure consistency and reliability.

Question

A challenging system design question focused on FinOps-related topics. The design typically involves integrating with a third-party API that is initially described as reliable. However, once you build your system, the interviewer changes the requirements, revealing that the API is actually unreliable.

To handle this, the only viable solution is to introduce locking within your system and gradually transition to using transactions with ACID guarantees to ensure consistency and reliability.

Sigiloso · Accepted Answer

The expectation is to keep the design practical and straightforward, avoiding unnecessary scaling techniques or over-engineering. The primary goal is to identify inconsistencies in the system’s behavior and address them by introducing either locking or transactions as needed.

After completing the design, you are expected to answer a series of rapid-fire questions on security, deployments, and other related topics. However, I didn’t make it that far, as I spent most of my time figuring out the locking mechanism—unfortunately for me.

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