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Oracle Database 10g R2: Administering RAC Sample Questions:

1. Your company is about to switch from one Internet Service Provider (ISP) to another, and this change of ISP comes along with a whole new set of network addresses. Your job is to change the VIP addresses of your company's Oracle Cluster.
How would you apply this change?

A) Change the VIP addresses in DNS and the cluster would pick up the new addresses automatically.
B) Stop all VIP-dependent components on all cluster nodes, make the necessary changes in DNS, and then restart all VIP-dependent components.
C) Reinstall the Oracle Clusterware layer of your cluster.
D) Change the VIP addresses on the cluster using SRVCTL while the cluster is fully functional.
E) Stop all VIP-dependent cluster components on one node, make the necessary changes in DNS, change the VIP using SRVCTL, restart all VIP-dependent components, and then perform these steps on al the remaining nodes one at a time.

2. Which four statements contain accurate information regarding RAC VIPs and application VIPs? (Choose four.)

A) A failed over RAC VIP does accept new connections.
B) It is recommended to share application VIPs among multiple applications.
C) An application VIP fails over if the associated application fails over.
D) It is recommended to share a RAC VIP among several database instances.
E) A RAC VIP fails over if the listener fails.
F) It is not recommended to share an application VIP among several applications.
G) It is not recommended to share a RAC VIP among several database instances.
H) A failed over application VIP does accept new connections.

3. You are running a two-instance database with six redo log groups defined and decide to add a third thread to support a third database instance on the third node of the cluster. Which three commands would you issue to achieve this using command line administration? (Choose three.)

A) ALTER SYSTEM ADD LOGFILE THREAD 3 GROUP 8;
B) ALTER DATABASE ENABLE THREAD 3;
C) ALTER SYSTEM ADD LOGFILE THREAD 3 GROUP 7;
D) ALTER DATABASE ADD LOGFILE THREAD 3 GROUP 8;
E) ALTER DATABASE ADD LOGFILE THREAD 3 GROUP 7;
F) ALTER SYSTEM ENABLE THREAD 3;

4. You define the ERP service using this statement:
srvctl add service -d RACDB -s ERP -r RAC01 -a RAC02 -P PRECONNECT srvctl start service -d
RACDB -s ERP
You then use this connect string to connect to your RAC instances:
ERP =
(DESCRIPTION =(FAILOVER=ON)(LOAD_BALANCE=ON)
(ADDRESS=(PROTOCOL=TCP)(HOST=N1 VIP)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=N2VIP)(PORT=1521))
(CONNECT_DATA = (SERVICE_NAME = ERP)
(FAILOVER_MODE =
(BACKUP=ERP_PRECONNECT)(TYPE=SESSION)(METHOD=PRECONNECT))))
You successfully establish a connection to your RAC database using the above connect string.
How many connections are established, and on which instances?

A) one on RAC01 and one on RAC02
B) two on RAC01
C) two on RAC02
D) only one on RAC01

5. View the Exhibit.
Users complain about the performance of an Oracle database-based application. You are requested to investigate. From Grid Control, you immediately infer that one of the cluster database instances and one of the cluster ASM instances are currently unavailable. You also see that the host where the instance belongs was recently rebooted due to an unknown reason.
Using Grid Control, you restart the instance and performance rapidly improves. You want to determine the cause of the instance startup failure after system boot, and you check the resource profiles on both the database and ASM instances involved.
Why was the instance not started by CRS?

A) The database instance could not be started by CRS because this instance depends on an ASM instance, whose autostart attribute indicates that CRS should not start this ASM instance after system boot.
B) The instance was started by CRS but due to multiple instance failures CRS disabled the database instance, thereby preventing further restarts.
C) The database instance autostart attribute is set to a value, thus preventing CRS from starting it after a system reboot.
D) The instance was not started by CRS because its target state was set to "offline" a while before the system was rebooted.
E) The instance was started by CRS after the system was rebooted, but someone stopped it from within SQL*Plus.

Solutions: