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Oracle Database 10g R2: Administering RAC : 1Z0-048 Exam

1Z0-048 Exam Questions
  • Exam Code: 1Z0-048
  • Exam Name: Oracle Database 10g R2: Administering RAC
  • Updated: Oct 04, 2026
  • Q & A: 150 Questions and Answers
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Oracle 1Z0-048 Exam Syllabus Topics:

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

Oracle Database 10g R2: Administering RAC Sample Questions:

Question #1

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

  • A. When using DBCA to create a service, you do not need to add the corresponding TNS entry in your tnsnames.ora on the cluster nodes.
  • B. After you create a service using SRVCTL, you need to start it with a separate command.
  • C. When using SRVCTL to create a service, you do not need to add the corresponding TNS entry in your tnsnames.ora.
  • D. After you create a service using Database Configuration Assistant (DBCA), you need to start it with a separate command.
  • E. After you create a service, you need to enable it for CRS to manage it.
Reveal Solution  Discussion  0

Correct Answer: A,B  🗳️

Question #2

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. The run queue length is going down each time.
  • B. The database throughput graphic is below the red dashed line during the last execution.
  • C. It takes less time to execute the workload each time.
  • D. The number of transactions per second is getting higher each time.
  • E. There is less paging each time.
Reveal Solution  Discussion  0

Correct Answer: C,D  🗳️

Question #3

After a disk failure caused by a power outage, your CRS is unable to start up completely because all your OCR files are lost. Which commands would you use and in which order to redress this
situation?
1 OCRCONFIG -REPAIR (on the local cluster node only)
2 OCRCONFIG -REPAIR (on all cluster nodes)
3 OCRCONFIG -RESTORE <path name>
4 OCRCONFIG -IMPORT <path name>
5 CRSCTL STOP CRS (on the local cluster node only)
6 CRSCTL STOP CRS (on all cluster nodes)
7 OCRCONFIG -SHOWBACKUP
8 CRSCTL START CRS (on the local cluster node only)
9 CRSCTL START CRS (on all cluster nodes)

  • A. 5,4,8.
  • B. 7,6,4,9.
  • C. 6,3,9.
  • D. 5,3,8.
  • E. 7,6,3,2,9.
  • F. 7,6,3,9.
  • G. 6,4,9.
Reveal Solution  Discussion  0

Correct Answer: F  🗳️

Question #4

You are creating a database in your RAC implementation. You are using the DBCA to create the database, and you selected the Raw Devices Mapping file on one of the screens of the DBCA. What is the reason for selecting this file?

  • A. You want to set the appropriate raw partition for each database file.
  • B. You want to configure an ASM diskgroup containing raw devices.
  • C. You want to provide the DBCA with a list of all the storage devices that are currently bound to a raw interface.
  • D. You want the DBCA to bind the partitions to raw devices.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #5

In a RAC environment, you see a steep increase for enq:HW- contention and gc current grant wait events. What would you do to fix this issue?

  • A. Increase the cache size of sequences.
  • B. Reduce the time of transactions by committing more often.
  • C. Reduce the number of updates causing locks on tables accessed by multiple instances.
  • D. Use larger uniform extent sizes for objects.
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

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