What is MVCC? How does multiversion concurrency control work?

Akanksha Buchke | Tech | Career | Resources on Instagram: "Interview Approach: Always start by showing structured thinking → identify the issue → explain why it happens → give practical fixes. Question: If two threads try to update the same account balance at the same time, how do you prevent data inconsistency? Answer Pointers: Problem: Race condition occurs → multiple threads update shared data without coordination. Fix Approaches: 1. Database Transactions + Locks → Use `SELECT FOR UPDATE`, ro