Exam Name: Oracle Database 10g R2: Administering RAC
Certification Provider: Oracle
Corresponding Certification: Other Oracle Certification
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Oracle 1Z0-048 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: RAC Database and Instance Administration | 20% | - Using SRVCTL and Enterprise Manager - Starting and stopping RAC components - Managing services and workloads |
| Topic 2: Backup and Recovery in RAC Environment | 15% | - Configuring RMAN for RAC - Performing backup and recovery operations |
| Topic 3: Monitoring and Performance Tuning | 10% | - Monitoring RAC environment - Resolving common performance issues |
| Topic 4: Oracle RAC Installation and Database Creation | 20% | - Preparing for RAC installation - Installing Oracle RAC software - Creating RAC databases with DBCA |
| Topic 5: Automatic Storage Management (ASM) for RAC | 15% | - Managing ASM instances and disk groups - Installing and configuring ASM |
| Topic 6: Oracle Clusterware Installation and Configuration | 20% | - Installing and configuring Clusterware - Pre-installation tasks and requirements - Managing Clusterware components |
Oracle Database 10g R2: Administering RAC Sample Questions:
You have a four-node cluster with instances RDBD1, RDBD2, RDBD3, and RDBD4. While evaluating statspack reports, you find nq: TX- index contention on page one under the category op 5 Timed Events.
Further study finds an unusually high number of c buffer busy waits in the Wait Events section.
Checking the Instance Activity Stats section, you see an unusually high value for eaf Node Splits.
Using v$segment_statistics, you identify that the top segment with c buffer busy waits is the index products_pk, which obtains the primary key from a sequence. You wish to present alternative solutions to the team to help reduce contention.
Which three actions would you recommend to reduce the overheads? (Choose three.)
- A. Set fast_start_mttr_target to a higher value.
- B. Encourage shorter transactions.
- C. Re-create the index as a global hash partitioned index.
- D. Set _lm_msg_batch_size to a higher value.
- E. Increase the sequence cache size if retaining the sequence.
- F. Re-create the table using a natural key instead of a surrogate key.
Correct Answer: C,E,F 🗳️
James works as a senior DBA for a finance company. He plans to implement a test RAC
environment. As per his plan, a three-node RAC would be implemented on a Windows platform,
with the following points related to the storage of files:
1) A single Oracle home would be shared by all the nodes.
2) The data files will extend automatically because the autoextend feature will be enabled.
3) The Oracle binaries and all the database files would be stored in a single file system.
4) The hardware RAID is used to support high availability.
These are the some of the storage options available for RAC implementation:
Option 1:Use OCFS with ASM Option 2:Use ASM and not OCFS Option 3:Use OCFS and not ASM Option 4:Use neither OCFS, nor ASM
Which storage option would you suggest for this plan?
- A. either Option 1 or Option 2
- B. either Option 2 or Option 4
- C. Option 3
- D. Option 2
- E. Option 1
- F. Option 4
Correct Answer: C 🗳️
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. There is less paging each time.
- D. It takes less time to execute the workload each time.
- E. The number of transactions per second is getting higher each time.
Correct Answer: D,E 🗳️
Which three statements regarding the management of Oracle Cluster Registry (OCR) on a UNIX platform are true? (Choose three.)
- A. One CRS instance in the cluster automatically creates OCR backups every four hours, at the beginning of each day and of each week.
- B. You can customize the OCR backup frequencies and the number of retained copies.
- C. The default target location of each automatically generated OCR backup file is the <CRS Home>/cdata/<cluster name> directory.
- D. The OCR autobackups are automatically copied to every ORA_CRS_HOME on each node in the cluster.
- E. The location of the OCR autobackup can be changed to a shared file system with the ocrconfig -backuploc command.
Correct Answer: A,C,E 🗳️
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 whether the dbinst directory is available on all the nodes
- B. to check for the existence of Oracle database software installation files in the /stage directory on all the nodes
- C. to check for node connectivity and Clusterware integrity
- D. to check if the ORACLEJHOME environmental variable is set to a correct value or not before the database installation
Correct Answer: C 🗳️
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