单项选择题
A.The ORACLE_BASE parameter is not set.
B.The installation is being performed by the root user.
C.The operating system group that will be specified should have root user as its member.
D.The installation is being performed without the "Create Starter Database" option selected.
E.The operating system group that will be specified must have permission to write to the inventory directory
单项选择题 You want to create a role to meet these requirements： 1. The role is to be protected from unauthorized usage. 2. The password of the role is not to be embedded in the application source code or stored in a table. method would you use to restrict enabling of such roles（）
单项选择题 Youhaveexecutedthiscommandtochangethesizeofthedatabasebuffercache： SQL>ALTERSYSTEMSETDB_CACHE_SIZE=2516582； Systemaltered.Toverifythechangeinsize，youexecutedthiscommand：SQL>SHOWPARAMETERDB_CACHE_SIZENAMETYPEVALUE ------------------------------------------------db_cache_sizebiginteger4194304 Whyisthevaluesetto4194304andnotto2516582（）
多项选择题 You notice that the performance of the database has degraded because of frequent checkpoints. Which twoactions resolve the issue（）