单项选择题

The Oracle Net architecture is based on which of the following？（）

A.OCI
B.OSI
C.TCP/IP
D.SNMP

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单项选择题

Which of the following file should be configured for dynamic service registration？（）

A.LISTENER.ORA
B.SQLNET.ORA
C.INIT.ORA
D.TNSNAMES.ORA

单项选择题

Which of the following architectures is used to support the agent or the application tier？（）

A.Simple
B.Two-tier
C.N-tier
D.Client-server

单项选择题

You just completed a manual open database backup. However there seems to be a problem with the database performance. You discover that the database is generating many log switches and the LGWR is consuming lots of CPU time. You have an idea of what the problem is and you begin looking at the information in V$BACKUP and in V$DATAFILE_HEADER.
What do you suspect is the problem？（）

A.A
B.B
C.C
D.D