フリー問題

問題文

A routine task has to run on a switch every night without anyone logging in. Which facility is intended for that?

選択肢

1. A scheduler on the switch runs the named job at the time or the interval that was configured for it, and it needs no session from an operator to do so.
2. An event manager on the switch runs the job when the previous run has finished or the log shows a matching message, and it repeats that until an operator stops it.
3. A container on the switch keeps a process running that sleeps between the runs, and the operator maintains that process or the tools it depends on.
4. A central platform opens a session to the switch each night or at the interval configured for it, and it records the output for the operator to see.