How to answer this Technical interview question about High Availability for Senior-Level Stability Architect?

How do you ensure high availability and fault tolerance in a blockchain-based platform?

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Stability Architect

Technical

Asked at

OKX

Difficulty :

Hard

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Explanation

This question assesses your ability to design systems that ensure uptime and resiliency in blockchain-based platforms where availability is critical. Recruiters are looking for candidates who can integrate redundancy, distributed architecture, and failover mechanisms. A strong answer will include specific methodologies, tools, and examples of achieving high availability. Avoid vague responses or failing to address blockchain-specific challenges like consensus delays or network partitions.

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Answer Example

I ensure high availability by implementing distributed ledgers and load-balanced nodes across multiple data centers to prevent single points of failure. I also incorporate failover mechanisms and real-time monitoring using tools like Prometheus and Grafana. For example, while working on a blockchain-based exchange, I designed a system with active-active redundancy across regions, maintaining 99.99% uptime during a surge in trading activity. Regular stress tests and disaster recovery plans are also critical components of my approach.

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