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The ORACLE_SID environment variable is set to +ASM. ASMLIB is not used in the configuration. You executed the following command to startup the Automatic Storage Management （ASM） instance.   SQL> STARTUP；   Which two activities are performed during a successful start up operation？（） 
A: The databases configured to use the ASM instance are mounted
B: The disk groups are mounted as per the ASM_DISKGROUPS initialization parameter
C: ASM starts the Oracle Cluster Synchronization Services （CSS） daemon if it is not started 
D: ASM discovers and examines the contents of all files that are in the paths specified in the  ASM_DISKGROUPS initialization parameters

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出自：Oracle认证

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