問題文
A program grabs something before it edits the shared candidate so that a second operator is kept out while it works, and it then asks the device to verify the pending edits without putting any of them into service. Which pair names those two things?
選択肢
- The program takes one exclusive branch up front, and it then asks the device for one trial pass of it.
- The program takes one exclusive branch up front, and it then asks the device for one trial patch of it.
- The program takes one exclusive lock up front, and it then asks the device for one trial pass of it.
- The program takes one exclusive lock up front, and it then asks the device for one trial patch of it.