フリー問題

問題文

Three separate scripts must reach the same step at the same instant, and one action has to be invoked by all of them at once. Which use does the syllabus give for the mechanism that achieves this?

選択肢

1. That contrivance ensures that a listed action is summoned concurrently or coordinates the labor between the separate routines.
2. That mechanism ensures that a named action is invoked concurrently or coordinates the work between the held locks.
3. That mechanism ensures that a named action is invoked concurrently or orders the work between the ordered percentiles.
4. That mechanism ensures that a named action is invoked concurrently or coordinates the work between the duplicated mirrors.