Oracle 1Z0-048 real exam prep : Oracle Database 10g R2: Administering RAC

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Oracle 1Z0-048 Exam Syllabus Topics:

Oracle Database 10g R2: Administering RAC Sample Questions:

1. Which two statements regarding Oracle Clusterware are correct? (Choose two.)

A) The Oracle9i srvConfig.loc file still exists for backward compatibility in Oracle Database 10g.
B) The installation of Oracle Clusterware is not necessary if you have already installed vendor-specific clusterware.
C) The Oracle Database 10g version of the srvConfig.loc file is the ocr.loc file.
D) The Oracle Database 10g CRS stack is compatible with Oracle 9i Group Services (GSD) processes.

2. View the Exhibit.
You are required to support your Oracle RAC configuration using ASM and RAID technology. You plan to discuss the storage configuration with the storage technology team. They have proposed a configuration as shown in the exhibit with a separate set of LUNs for the data disk group and the flash recovery area disk group and a 500 KB stripe size in line with other non-Oracle LUNs. The Data disk group has four250G LUNs and the FRA disk group has four500G LUNS, both of which are mirrored.

A) The LUNs are not aligned with ASM Allocation Units, which may lead to I/O bottlenecks.
B) Index Range Scans would cause I/O to many different physical disks.
C) I/O to the flash recovery area disk group for backups may cause performance issues when full table scans are occurring during batch workloads.
D) Retention policies that require backups to be kept for long time periods may cause wasted space due to large allocation units.

3. 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) You cannot tell what the problem is based on Exhibit2, so you cannot fix this.
B) 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.
C) Somebody relocated the VIP from the second node to the first node for an unknown reason. You just have to relocate it back.
D) There is no problem, so nothing needs to be corrected.
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.

4. You have a well-tuned, non-RAC single instance Oracle database with several services, all of which perform perfectly. You plan to migrate the database to RAC in the next two weeks and all file systems would be shared using Oracle Cluster File System. After the migration, you want to perform a test to monitor RAC-specific tuning issues that would not have occurred on a non-RAC database. Which six areas would you monitor to determine whether there are RAC-specific performance problems after migration? (Choose six.)

A) Services with insert-intensive applications that generate their own keys without Oracle sequences
B) Services with applications that use external tables
C) Instance recovery time
D) Interconnect latency
E) Services with applications that truncate large tables
F) Services with query-intensive applications relying on full table scans
G) Services with applications using local context variables
H) Services with applications that have occasional queries, using index access on modestly sized tables
I) Services with insert-intensive applications that use Oracle sequences for index keys

5. 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$ASM_DISK
B) when you run ALTER DISKGROUP...ADD DISK
C) when you query V$ASM_DISKGROUP
D) when you run ALTER DISKGROUP...RESIZE DISK
E) when you query VJASMjDPERATION

Solutions: