Your production database is running in the ARCHIVELOG mode and the ARCn process is functional. You have two online redo log groups. Which three background processes would be involved when a log switch happens？（）
- A、 log writer
- B、 archival
- C、 process monitor
- D、 system monitor
- E、 change tracking writer
- F、 database writer
正确答案:A,B
答案解析:有
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