Answer
Transactions add latency, reduce concurrency, and require replica set or sharded clusters. They must be used sparingly.
Quick Answer
Challenges with MongoDB transactions: performance overhead (locks held, snapshot maintained for duration), limited to 60 seconds by default, increased conflict and abort rate under high concurrency, cross-shard transactions add latency. Best practice: keep transactions short, minimize documents touched, prefer schema design that avoids transactions (embedding, atomic update operators).
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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