What Oracle process runs when the database is in ARCHIVELOG mode but not when it is in
NOARCHIVELOG mode?
A. MMON
B. LGWR
C. ARCH
D. ARWR
E. COPY
感觉没啥好分析的，应该不会有人选错
The ARCH process starts up when the database is in ARCHIVELOG mode.IT is
responsible for moving the online redo logs to the various archived redo log destination
directories.
原文：http://www.cnblogs.com/Babylon/p/7792633.html