A mechanism that ensures data integrity when multiple transactions read or write the same data simultaneously. Locking is a common technique that prevents one transaction from interfering with data being updated by another. Without adequate concurrency control, problems such as lost updates can occur, where one transaction's changes are silently overwritten by another.

Past questions testing this term · 1 questions

• 2010h22h #822台のPCから一つのファイルを並行して更新した。ファイル中の同一データ（データ1）に対する処理が①～④の順に行われたとき、データ1はどの値になるか。ここで、デー…