单项选择题 ClicktheExhibitbuttonandexaminethediagram，whichillustratesthecomponentsperformingtaskswithinanOracleSharedSeverenvironment.Whichtaskisbeingperformedbycomponent4？（）

单项选择题 What is true about this statement used during import？（） imp hr/hr tables= （employee， departments） file=hr.dmp ignore=y

多项选择题 Archive file format LOG_ARCHIVE_FORMAT is defined as arch_%s.arc. A week ago， you just archived arch_4.arch to tape， then removed all archived files to save disk space. Yesterday you saw arch_10.arc and arch_11.arc on the disk. Today， you see arch_3.arc in the archive directory.  Which two could you happened？（）