Oracle Database 10g R2: Administering RAC - 1Z0-048 Exam Questions [2026]

QUESTION NO: 1
To complete a cluster database creation, the DBA must choose the cluster database storage method. Which storage choice is not correct? (Choose the incorrect one.)

A. Automatic Storage Management (ASM) B. Standard UNIX file system C. Supported SAN/NAS storage D. Raw Devices E. Cluster File System

Correct Answer: B

QUESTION NO: 2
Your company asked you to implement RAC to enhance the scalability and availability of the database that you manage. Your coworker suggested that you use ASM as the only storage option. However, you implemented RAC with Automatic Storage Management (ASM) as well as OCFS as storage options. What are the reasons for implementing both OCFS and ASM as storage options? (Choose all that apply.)

A. You require OCFS to store archive log files because ASM does not support these files. B. You want to use the Oracle Managed Files (OMF) feature but that is not supported by ASM. C. You do not want to use raw devices to store voting and OCR files. D. You do not want to store any file other than voting and OCR files in ASM. E. You want to avoid keeping Oracle binaries on local storage.

Correct Answer: C,E

QUESTION NO: 3
View the Exhibit and examine an installation step of Oracle Enterprise Manager Grid Control 10gR2 to manage your RAC installation. You entered the host name but you are not sure about the port number. Thefollowing is the list of port numbers from the host ed-otraclin17b.us.oracle.com:

A. 1521 B. 4889 C. 3938 D. 5561 E. 1158

Correct Answer: A

QUESTION NO: 4
Which statement is true?

A. You must use RMAN to migrate your change-tracking file to ASM storage. B. You must use RMAN to migrate your online redo log files to ASM storage. C. You must use RMAN to migrate your data files to ASM storage. D. You must use RMAN to migrate your flashback log files to ASM storage. E. You can migrate your entire database to ASM storage without shutting down your database. F. You must use RMAN to migrate yourtempfiles to ASM storage.

Correct Answer: C

QUESTION NO: 5
You and your colleague are working with Oracle Support on a database instance stability issue. The Oracle Support engineer wants you to issue a crsctl debug log crs ?crsctl debug log crs command to assist you in your troubleshooting assignment. Why does the Oracle Support engineer want you to do this?

A. to enable extra debugging on the currently running and CRS daemons as well as those that will run in the future B. to list what debugging options are available on the CRS daemon C. to list which debugging options are enabled on the CRS daemon D. to enable extra debugging on the currently running CRS daemon E. to enable extra debugging on the CRS daemon the next time the CRS daemon is started

Correct Answer: A

QUESTION NO: 6
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. 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. B. Reinstall the Oracle Clusterware layer of your cluster. C. Stop all VIP-dependent components on all cluster nodes, make the necessary changes in DNS, and then restart all VIP-dependent components. D. Change the VIP addresses in DNS and the cluster would pick up the new addresses automatically. E. Change the VIP addresses on the cluster using SRVCTL while the cluster is fully functional.

Correct Answer: A

QUESTION NO: 7
Your system administrator informs you that there are a number of unexpected system reboots occurring on one of your Oracle database clusters. The system administrator has no clue whether this is a hardware or system software issue or whether the Oracle Clusterware is causing these reboots. To determine the source of these unexpected reboots, the system administrator asks you how you can enable debugging on the Oracle Clusterware software components. Which two statements are true regarding Oracle Clusterware debugging? (Choose two.)

A. You have to restart Oracle Clusterware after enabling debugging to activate it. B. You enable Oracle Clusterware debugging using the CRSCTL command as the root user. C. You can enable Oracle Clusterware debugging dynamically. D. You enable Oracle Clusterware debugging using the CRSCTL command as the oracle user. E. You enable Oracle Clusterware debugging using the SRVCTL command.

Correct Answer: B,C

QUESTION NO: 8
View the Exhibit.
You are asked to help a colleague to logically remove node NLEDUC2 from a RAC cluster
installation.
On observing the colleague's terminal, you notice the output as seen in the exhibit. Based on this,
which five additional steps would you recommend? Do not be concerned with the correct
sequence for the steps.
(Choose five.)

A. Check that the node has been removed from the database and ASM inventories. B. Check that the ONS configuration has been updated on the remaining node. C. Stop and restart the nodeapps on NLEDUC1. D. Remove the node from the clusterware. E. Check that the database and ASM instances are all terminated on NLEDUC2. F. Stop and restart the clusterware on NLEDUC1. G. Check that the software has been removed from the database and ASM homes on NLEDUC2. H. Remove the listener from NLEDUC2.

Correct Answer: A,B,D,E,G