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Oracle 1Z0-048 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Performance and Troubleshooting | - Diagnosing RAC interconnect and cache fusion issues - RAC performance tuning and monitoring |
| Topic 2: Storage Management | - Automatic Storage Management (ASM) in RAC - Shared storage configuration and best practices |
| Topic 3: Installation and Configuration | - Oracle Clusterware installation and setup - RAC database creation and configuration |
| Topic 4: Administration and Maintenance | - Service management and workload balancing - Node management and cluster administration |
| Topic 5: High Availability and Recovery | - Failover and recovery mechanisms in RAC - Backup and recovery strategies in clustered environments |
| Topic 6: Oracle Real Application Clusters Architecture | - RAC instance architecture and Cache Fusion - Clusterware components and architecture |
Oracle Database 10g R2: Administering RAC Sample Questions:
Which two statements about parallel recovery in a RAC environment are true? (Choose two.)
- A. The use of the RECOVER Y_PARALLELISM initialization parameter is the only way to initiate parallel recovery.
- B. Parallel recovery is most effective at reducing recovery time while concurrently recovering several data files on several disks.
- C. The RECOVERY_PARALLELISM initialization parameter specifies the number of redo application server processes participating in instance or media recovery.
- D. The RECOVER Y_PARALLELISM initialization parameter causes serial recovery if the value is greater than two.
Correct Answer: B,C 🗳️
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 want to avoid keeping Oracle binaries on local storage.
- B. You do not want to use raw devices to store voting and OCR files.
- C. You want to use the Oracle Managed Files (OMF) feature but that is not supported by ASM.
- D. You require OCFS to store archive log files because ASM does not support these files.
- E. You do not want to store any file other than voting and OCR files in ASM.
Correct Answer: A,B 🗳️
When an ASM instance initializes, ASM discovers and examines the contents of all the disks that are in the paths designated in the ASM_DISKSTRING initialization parameter. Under which four other circumstances does disk discovery take place? (Choose four.)
- A. when you query V$ASM_DISKGROUP
- B. when you run ALTER DISKGROUP...ADD DISK
- C. when you query VJASMjDPERATION
- D. when you query V$ASM_DISK
- E. when you run ALTER DISKGROUP...RESIZE DISK
Correct Answer: A,B,D,E 🗳️
In which two orders could you run the following commands to migrate your database to ASM?
(Choose two.)
1 SHUTDOWN IMMEDIATE;
2 SWITCH DATABASE TO COPY;
3 STARTUP NOMOUNT;
4 ALTER DATABASE OPEN;
5 ALTER DATABASE TEMPFILE '/u01/ORCL/temp1.dbf DROP;
6 ALTER SYSTEM SET db_create_file_dest='+DATA' SCOPE=SPFILE;
7 BACKUP AS COPY DATABASE FORMAT '+DATA';
8 ALTER TABLESPACE temp ADD TEMPFILE;
9 RESTORE CONTROLFILE FROM '/u01/ORCL7control1.ctl';
10 ALTER SYSTEM SET control_files=" SCOPE=SPFILE;
11 RECOVER DATABASE;
12 ALTER DATABASE MOUNT;
- A. 6,10,1, 3,9,12,7,2,11,8,4,5
- B. 10,6,1, 3,9,12,7,2,11,4,8,5
- C. 6,10,1, 9,3,12,7,2,11,4,5,8
- D. 1,2,10,3,5,4,11,6,7,8,9,12
- E. 6,10,1, 3,9,12,7,2,11,4,8,5
Correct Answer: B,E 🗳️
After applying a patch to the network device drivers in your operating system, you verify using CRS_STAT-T that everything runs normally. View Exhibitl for the CRS_STAT-T output.
After your coffee break, customers begin complaining about the performance of your Oracle Real Application Clusters database. Suddenly, the response time has increased and establishing new connections is slower than it used to be. You run CRS_STAT-T again to check if there is a problem.
Based on Exhibit2, what is your conclusion, and what would you do to correct this?
- A. The second node in your cluster is down and, therefore, CRS has relocated the VIP from the second node to the first node. After you fix the problem on the second node, you have to relocate the relocated VIP back to its original node using the SRVCTL command.
- B. Somebody relocated the VIP from the second node to the first node for an unknown reason. You just have to relocate it back.
- C. There is no problem, so nothing needs to be corrected.
- D. You cannot tell what the problem is based on Exhibit2, so you cannot fix this.
- E. The second node in your cluster is down and, therefore, CRS has relocated the VIP from the second node to the first node. After you fix the second node, CRS would relocate the relocated VIP back to its original node.
Correct Answer: E 🗳️
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