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Oracle Database 10g R2: Administering RAC Sample Questions:

1. 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) Set the DEBUG environment variable to TRUE before you execute the DBCA command.
D) Request extra information by adding the -v (verbose) command-line flag at the DBCA command line.
E) Request extra information by adding the -d (debug) command line flag at the DBCA command line.
F) Set the SRVM_DEBUG environment variable to TRUE before you execute the DBCA command.

2. You are working as a DBA in a RAC environment that is available for testing. The RAC environment has all the database files stored in the OCFS file system. You plan to install ASM and move all the database files to ASM to achieve better performance. During the installation, you selected redundancy level as normal for the disk group being added. What is the reason for selecting this redundancy level?

A) You have three failure groups defined, so you want to use three-way mirroring.
B) You do not want to have any mirroring in the disk group.
C) You want to use hardware mirroring.
D) You have two failure groups defined, so you want to use two-way mirroring.

3. Your four-node RAC cluster is no longer coping with workloads for one of its databases at peak periods and you decide to add another node to the cluster. The current configuration has two RAC databases, each with four instances with only the second database using ASM as a clustered database file system. ASM is installed in a separate home. Which five steps must you take to add all the software components and processes to the new node before you run DBCAto add database and ASM instances on the new cluster nodes. Do not be concerned with the correct sequence for the steps. (Choose five.)

A) Run netca from the new node to add a listener to the new node.
B) Run racgons add_config from one of the existing nodes to add the ONS metadata to the OCR.
C) Run cluvfy stage -pre crsinst <list of all nodes> from one of the existing nodes to verify the cluster configuration.
D) Run addNode.sh in the ASM home/oui/bin directory from one of the existing nodes.
E) Run addNode.sh in the RDBMS home/oui/bin directory from one of the existing nodes.
F) Run addnode.sh in the Clusterware home/oui/bin directory from one of the existing nodes to define the new node to all existing nodes.
G) Run addnode.sh in the Clusterware home/oui/bin directory from each of the existing nodes once to define the new node to each existing node.

4. After applying a patch to the network device drivers in your operating system, you verify using CRS_STAT-T that everything runs normally. View Exhibitl for the CRS_STAT-T output.
After your coffee break, customers begin complaining about the performance of your Oracle Real Application Clusters database. Suddenly, the response time has increased and establishing new connections is slower than it used to be. You run CRS_STAT-T again to check if there is a problem.
Based on Exhibit2, what is your conclusion, and what would you do to correct this?

A) Somebody relocated the VIP from the second node to the first node for an unknown reason. You just have to relocate it back.
B) There is no problem, so nothing needs to be corrected.
C) The second node in your cluster is down and, therefore, CRS has relocated the VIP from the second node to the first node. After you fix the problem on the second node, you have to relocate the relocated VIP back to its original node using the SRVCTL command.
D) You cannot tell what the problem is based on Exhibit2, so you cannot fix this.
E) The second node in your cluster is down and, therefore, CRS has relocated the VIP from the second node to the first node. After you fix the second node, CRS would relocate the relocated VIP back to its original node.

5. You are implementing a three-node RAC setup in your company. You have already performed these tasks:
1) Hardware and OS configuration 2) Cluster file system installation 3) Clusterware installation You executed the following command in one of the nodes: cluvfy stage -pre dbinst -n all
What is the reason for executing this command?

A) to check for the existence of Oracle database software installation files in the /stage directory on all the nodes
B) to check if the ORACLEJHOME environmental variable is set to a correct value or not before the database installation
C) to check for node connectivity and Clusterware integrity
D) to check whether the dbinst directory is available on all the nodes

Solutions: