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Oracle Database 10g R2: Administering RAC Sample Questions:

1. Which two statements are true in any RAC environment? (Choose two.)

A) A RAC database must contain at most one redo thread for each instance.
B) A publicly enabled thread can be used by any instance of your RAC database.
C) After your redo threads are defined, you cannot add new ones.
D) A RAC database must contain at least two threads of redo log files per instance.
E) A redo thread must contain at least two groups of redo log files before it can be enabled.

2. 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 is currently unavailable. You also notice 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 the system reboot, and you check the resource profiles on both the database and ASM instances involved.
Why was the instance not started by CRS?

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

3. View the Exhibit, which displays the cluster database performance page after the same workload has been executed three times on your cluster without varying any non-Oracle workloads on the cluster. What are the two ways by which you can tell that the corresponding application was better tuned during the second and third execution? (Choose two.)

A) It takes less time to execute the workload each time.
B) The number of transactions per second is getting higher each time.
C) The database throughput graphic is below the red dashed line during the last execution.
D) The run queue length is going down each time.
E) There is less paging each time.

4. You are requested to make your Web server, which accesses a clustered Oracle database, highly available. Which solution would you propose?

A) Bring your Web server under control of the Oracle Clusterware and use an application VIP address to reach your Web server from your clients.
B) Bring your Web server under control of the Oracle Clusterware and use the private IP address to reach your Web server from your clients.
C) Bring your Web server under control of the Oracle Clusterware and use the public IP address to reach your Web server from your clients.
D) Bring your Web server under control of the Oracle Clusterware and use the RAC VIP address to reach your Web server from your clients.
E) Because you cannot use Oracle Clusterware to protect your Web server, you come up with an operating system solution.

5. After adding two new high-performance nodes to your existing eight-node Oracle Database cluster, you decide to remove the two oldest nodes from your cluster. You start by removing the instances from the nodes you are about to remove by using the Database Configuration Assistant (DBCA). During the execution, a problem arises and the DBCA terminates with a fatal exception. Before you contact Oracle Support, you want to create a Java-based tool trace file so that Oracle Support can assist you in resolving this issue as quickly as possible. How would you create this trace file?

A) Set the SRVM_TRACE environment variable to TRUE before you execute the DBCA command.
B) There is no need to do anything special because Java-based tool tracing is enabling by default for DBCA.
C) Request extra information by adding the -v (verbose) command-line flag at the DBCA command line.
D) Set the DEBUG environment variable to TRUE before you execute the DBCA command.
E) Set the SRVM_DEBUG environment variable to TRUE before you execute the DBCA command.
F) Request extra information by adding the -d (debug) command line flag at the DBCA command line.

Solutions: