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Oracle 1Z0-048 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Administration and Maintenance | - Node management and cluster administration - Service management and workload balancing |
| Topic 2: Installation and Configuration | - Oracle Clusterware installation and setup - RAC database creation and configuration |
| Topic 3: Storage Management | - Automatic Storage Management (ASM) in RAC - Shared storage configuration and best practices |
| Topic 4: High Availability and Recovery | - Backup and recovery strategies in clustered environments - Failover and recovery mechanisms in RAC |
| Topic 5: Performance and Troubleshooting | - Diagnosing RAC interconnect and cache fusion issues - RAC performance tuning and monitoring |
| Topic 6: Oracle Real Application Clusters Architecture | - Clusterware components and architecture - RAC instance architecture and Cache Fusion |
Oracle Database 10g R2: Administering RAC Sample Questions:
Over a six-month period, you have been regularly monitoring your four-instance RAC database,
which is running on the first 4 nodes of a 6-node cluster, by using ADDM and by monitoring well-
known combinations of wait event and statistics in AWR reports.
Two weeks ago, a newer version of your main application went live. Starting last week, you
noticed a large increase in CPU time (consumed by the three application services on your RAC
database) due to increased workload.
The OLTP and DSS services have not had a decrease in the percentage of time spent using CPU.
However, for the BATCH service the percentage of time spent using CPU has gone down and the
wait-time percentage has increased.
You want to recommend a tuning exercise to your team. Which two recommendations would you
make first, based on the symptoms described? (Choose two.)
- A. The OLTP and DSS service programs may scale well and could benefit from adding new database instances on one or both of nodes 5 and 6, and by adding more nodes the SQL for BATCH service programs would perform better due to more CPU power.
- B. Tune SQL from the BATCH service programs because they may benefit from SQL tuning.
- C. The BATCH service programs may scale well and could benefit from adding new database instances on either node 5 or 6, or on both.
- D. The OLTP and DSS service programs may scale well and could benefit from adding new database instances on either node 5 or 6, or on both.
- E. Tune SQL for the OLTP and DSS service programs because they may benefit from SQL tuning.
Correct Answer: B,D 🗳️
Which statement regarding Clusterware is false? (Choose the false statement.)
- A. The Oracle Database 10g Clusterware stack is compatible with Oracle 9i Group Services (GSD) processes.
- B. Oracle Clusterware is installed using the Oracle Universal Installer (OUI).
- C. The ORA_CRS_HOME directory must not be the same as the ORACLEJHOME directory.
- D. The installation of Oracle Clusterware is mandatory even if you have installed vendor-specific clusterware.
Correct Answer: A 🗳️
You execute the following command from the first node of your cluster: crsctl add ess votedisk /dev/raw/raw9
However, you get an error message indicating that Oracle Clusterware stack is not started. Which command would you execute?
- A. crsctl add ess votedisk /dev/raw/raw9 -force
- B. crsctl enable crs Crsctl add ess votedisk /dev/raw/raw9 -force
- C. crsctl start crs Crsctl add ess votedisk /dev/raw/raw9
- D. crsctl enable crs Crsctl add ess votedisk /dev/raw/raw9
- E. crsctl start crs Crsctl add ess votedisk /dev/raw/raw9 -force
Correct Answer: A 🗳️
You want check whether the group services node application is running on all the nodes in your cluster before you create a cluster database. Which utility can you use to make sure the node application is running on all nodes in the cluster?
- A. crs_stat
- B. Isnrctl
- C. onsctl
- D. addnode.sh
- E. crsctl
Correct Answer: A 🗳️
What should you do when creating a disk group that would store your RAC database?
- A. Make sure that all database instances are functional.
- B. Make sure that all database instances are running in restricted mode.
- C. Make sure that ASM targets are accessible from Database Control.
- D. Make sure that the disk group is mounted by all ASM instances.
Correct Answer: D 🗳️
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