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Oracle 1Z0-048 Exam Syllabus Topics:

Oracle Database 10g R2: Administering RAC Sample Questions:

1. After a power failure, you noticed that one of your cluster database instances did not start automatically, whereas all other instances came up successfully. What would you do to determine the precise cause for the instance startup failure? (Choose three.)

A) Check the resource state by using the CRS_STAT command.
B) Check the alert.log file that belongs to the instance that did not start.
C) Reboot the node where the failing instance resides to check if the problem is persistent.
D) Enable extra debugging in the Oracle Clusterware software by using the CRSCTL command.
E) Check for OCR corruptions by using the OCRCHECK command.
F) Check the alert.log file that belongs to the Oracle Clusterware software.
G) Check if the Oracle Clusterware is functional by using the CRSCTL command.

2. You have migrated your 10g R1 cluster to 10g R2. You wish to create multiple copies of the voting disk. What must you consider when doing this?

A) Since ASM is the stated direction of Oracle, ASM is the best storage for voting disks.
B) If multiplexing, two voting disks on independent devices is ideal.
C) For the voting disk, it is better to rely on multipathing solutions instead of multiplexing.
D) If multiplexing, three voting disks on independent devices is ideal.

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

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) You cannot tell what the problem is based on Exhibit2, so you cannot fix this.
B) Somebody relocated the VIP from the second node to the first node for an unknown reason. You just have to relocate it back.
C) There is no problem, so nothing needs to be corrected.
D) 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.
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 problem on the second node, you have to relocate the relocated VIP back to its original node using the SRVCTL command.

5. Which CREATE SEQUENCE option is the most scalable?

A) CACHE ORDER
B) NOCACHE NOORDER
C) CACHE NOORDER
D) NOCACHE ORDER

Solutions: