How does DB2 handle concurrent transactions?

DB2 handles concurrent transactions by utilizing locking mechanisms and isolation levels. This means that when multiple transactions are being executed simultaneously, DB2 ensures that they do not interfere with each other by employing various locking techniques such as row-level or table-level locking. Additionally, DB2 offers different isolation levels, such as Read Committed or Repeatable Read, to control the visibility of data changes during transactions. These mechanisms help maintain data integrity and consistency in multi-user environments.