单选 软件与IT认证综合练习2026-06-29 更新 3 阅读

Which of the following best describes how locks are used in DB2?（）

  1. To maintain control of updated rows for commit processing
  2. To ensure only committed changes are altered by another application 正确答案
  3. To allow two applications to update the same row of data simultaneously
  4. To prevent multiple applications from accessing the same data simultaneously
参考答案：B

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