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單項(xiàng)選擇題

Users in your PROD database complain about the slow response of the transactions. While investigating the reason， you find that the transactions are waiting for the undo segments to be available， and undo retention has been set to zero. What would you do to overcome this problem？（）

A.increase the undo retention
B.create more undo segments
C.create another undo tablespace
D.increase the size of the undo tablespace

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單項(xiàng)選擇題

You manually create an additional listener process，L1，for databases PROD， 
PAYDB and FINDB. While starting up the listener process，you get the following error message： LSNRCTL> start l1 
Starting /u01/app/oracle/product/10.1.0/db_1/bin/tnslsnr： please wait... 
TNSLSNR for Linux： Version 10.1.0.2.0 - Production 
System parameter file is /u01/app/oracle/product/10.1.0/db_1/network/admin/listener.ora Log messages written to /u01/app/oracle/product/10.1.0/db_1/network/log/l1.log Error listening on：
（ADDRESS=（PROTOCOL=TCP）（HOST=144.23.230.185）（port=8899）） 
TNS-12542： TNS：address already in use TNS-12560： 
TNS：protocol adapter error TNS-00512： Address already in use 
Linux Error： 98： Address already in use 
Listener failed to start. See the error message（s） above... 
What action would you take to overcome this error without disrupting any existing database communications？（）

A.stop and restart the listener process
B.set the TNS_ADMIN environmental variable
C.stop all running listener processes and restart the listener process
D.change the port number to an unused port number and restart the listener process
E.change the IP address to host machine name in the LISTENER.ORA file and restart the listener process
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