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Oracle Database 10g R2: Administering RAC Sample Questions:

1. Your company has a combination of high availability and scalability requirements that need to be addressed, and RAC has been discussed as a solution. There are a mix of "off-the-shelf software products and homegrown applications currently in use in your environment that run on single-instance Oracle databases. You have been asked by the IT director to provide an impact analysis report to help assess the impact on applications when migrating to RAC. Which three are among the areas that should be examined for performance impact and application functionality impact or for both? (Choose three.)

A) three-tier applications that use application global context variables
B) client/server type applications that use application local context variables
C) applications that truncate tables in a data warehouse process
D) applications that use large parallel full table scans
E) applications that access small tables using the same index occasionally
F) applications that use SQL profiles created by the ATO optimizer in the SQL Tuning Advisor

2. You are asked to design a Maximum Availability Solution for a RAC configuration that provides for continuous availability for the Oracle database and which can survive instance failures, node failures, data failures, and site failures. The RAC configuration has a four-node cluster with five different services configured. Performance must be maintained for any failure situation for all the services, and all data must be preserved. All the servers in the configuration will have the same hardware. Which configuration would you recommend?

A) Asymmetric RAC and a Logical Standby Database in a Dataguard configuration with RAC and ASM at all sites with the same number of instances but different service preferences
B) Asymmetric RAC and a Physical Standby Database in a Dataguard configuration with RAC and ASM at all sites with the same number of instances but different service preferences
C) Symmetric RAC and a Physical Standby Database in a Dataguard configuration with RAC and ASM at all sites with the same number of instances and the same service preferences
D) Asymmetric RAC and Dataguard configuration with a mixture of RAC and single instances using ASM at all sites with the same service preferences

3. 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 instance was started by CRS after the system was rebooted, but someone stopped it from within SQL*Plus.
D) The database instance autostart attribute is set to a value, thus preventing CRS from starting it after a system reboot.
E) The instance was not started by CRS because its target state was set to "offline" a while before the system was rebooted.

4. Several steps must be followed to successfully add a new node to your cluster database. Assuming that a UNIX platform is used, which of the three steps below are correct? (Choose three.)

A) Add instances using OUI.
B) Add the RAC software to the new node using addnode.sh from ORA_CRS_HOM
C) Configure the OS and hardware for the new node.
D) Reconfigure listeners for the new node with netca.
E) Add the node to the cluster using the addnode.sh script run from ORA_CRS_HOME.

5. What is the action of your client connection when it is using the following connect string? net_service_name= (DESCRIPTION (ADDRESS=(PROTOCOL=tcp)(HOST=sales1 -svr-vip)(PORT=1521)) (ADDRESS=(PROTOCOL=tcp)(HOST=sales2-svr-vip)(PORT=1521))) (CONNECT_DATA=(SERVICE_NAME=sales. us. acme, com)))

A) It tries to connect you to the listener on SALES2-SRV-VIP if the listener on SALES1-SRV-VIP is down.
B) It always connects you to the first protocol address.
C) It randomizes its connection on the available listeners.
D) It always connects you to the least loaded node.

Solutions: