1Z0-048 exam dumps

Oracle 1Z0-048 Value Package

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  • Exam Code: 1Z0-048
  • Exam Name: Oracle Database 10g R2: Administering RAC
  • No. of Questions: 150 Questions and Answers
  • Updated: Sep 13, 2026

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Oracle 1Z0-048 Exam Syllabus Topics:

SectionObjectives
High Availability Concepts- Failover mechanisms
- RAC recovery scenarios
Performance and Tuning- Load balancing and failover
- Troubleshooting performance issues
- Monitoring RAC performance
Installation and Configuration- Preparing RAC environment
- Installing RAC database software
- Installing Oracle Clusterware
Cluster and Database Administration- Managing RAC instances
- Services configuration and management
- Backup and recovery in RAC
Oracle RAC Architecture- Cluster fundamentals and components
- Cache Fusion and interconnect communication
- Shared storage concepts

Oracle Database 10g R2: Administering RAC Sample Questions:

You define the ERP service using this statement:
srvctl add service -d RACDB -s ERP -r RAC01 -a RAC02 -P PRECONNECT srvctl start service -d
RACDB -s ERP
You then use this connect string to connect to your RAC instances:
ERP =
(DESCRIPTION =(FAILOVER=ON)(LOAD_BALANCE=ON)
(ADDRESS=(PROTOCOL=TCP)(HOST=N1 VIP)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=N2VIP)(PORT=1521))
(CONNECT_DATA = (SERVICE_NAME = ERP)
(FAILOVER_MODE =
(BACKUP=ERP_PRECONNECT)(TYPE=SESSION)(METHOD=PRECONNECT))))
You successfully establish a connection to your RAC database using the above connect string.
How many connections are established, and on which instances?

  • A. two on RAC02
  • B. only one on RAC01
  • C. one on RAC01 and one on RAC02
  • D. two on RAC01
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

You are considering issues involving backup and recovery of the voting disk. Select four correct statements. (Choose four.)

  • A. If you lose your voting disk and do not have a backup, you must reinstall Oracle Clusterware. ]
  • B. To back up the voting disk, use the command ocrconfig -export.
  • C. Use symbolic links to simplify recovery of the voting disk.
  • D. You can determine the voting disks currently used by CSS with the command crsctl query ess votedisk.
  • E. Backup can be performed online.
Reveal Solution  Discussion  0

Correct Answer: A,C,E  🗳️

Which three statements regarding backup of the voting disk are true? (Choose three.)

  • A. Whenever a voting disk backup is made, the Clusterware software should be stopped on all nodes in the cluster.
  • B. A backup of the voting disk should be taken whenever an existing node is removed from the cluster.
  • C. A backup of the voting disk should be taken whenever a new node is added to the cluster.
  • D. On UNIX platforms, the voting disk can be backed up with the dd command.
  • E. A backup of the voting disk should be taken whenever an RMAN catalog reset is done.
Reveal Solution  Discussion  0

Correct Answer: B,C,D  🗳️

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 cluvfy stage -pre crsinst <list of all nodes> from one of the existing nodes to verify the cluster configuration.
  • B. 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.
  • C. Run racgons add_config from one of the existing nodes to add the ONS metadata to the OCR.
  • 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 each of the existing nodes once to define the new node to each existing node.
  • G. Run netca from the new node to add a listener to the new node.
Reveal Solution  Discussion  0

Correct Answer: B,C,D,E,G  🗳️

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. For the voting disk, it is better to rely on multipathing solutions instead of multiplexing.
  • B. Since ASM is the stated direction of Oracle, ASM is the best storage for voting disks.
  • C. If multiplexing, two voting disks on independent devices is ideal.
  • D. If multiplexing, three voting disks on independent devices is ideal.
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

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