Answer
Use quorum reads/writes, distributed locks, idempotent updates, ordered logs, and consensus protocols such as Raft.
Quick Answer
Strong consistency in distributed Node.js: use a single-leader database (PostgreSQL) for writes with read replicas, implement optimistic concurrency (version checks before writes), use distributed transactions carefully via sagas, leverage Redis SET with NX+EX for distributed locks, and design idempotent operations so retries are safe.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ