Answer Posted / Anju Upadhyay
MongoDB supports multi-document transactions starting from MongoDB 4.0, but it does not support row-level locking as seen in traditional relational databases.nTo perform a multi-document transaction, you can use the beginTransaction and commitTransaction methods within a session. The isolation level is set to snapshot isolation by default, which ensures that transactions see a consistent snapshot of data during their execution.nFor better concurrency control, you can also implement optimistic locking using versioning or timestamp fields in your documents.
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