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Oracle 1Z0-048 Exam Syllabus Topics:

Oracle Database 10g R2: Administering RAC Sample Questions:

1. Which two statements about parallel recovery in a RAC environment are true? (Choose two.)

A) The RECOVER Y_PARALLELISM initialization parameter causes serial recovery if the value is greater than two.
B) The use of the RECOVER Y_PARALLELISM initialization parameter is the only way to initiate parallel recovery.
C) The RECOVERY_PARALLELISM initialization parameter specifies the number of redo application server processes participating in instance or media recovery.
D) Parallel recovery is most effective at reducing recovery time while concurrently recovering several data files on several disks.

2. You decide to implement Fast Start Failover for your RAC Data Guard configuration to improve your high availability strategy. Which are the two valid locations for the DG Broker configuration files? (Choose two.)

A) on the shared storage at the primary location
B) on the shared storage at the observer location
C) on the storage that is shared between the observer location and at least one of the instances that is part of the data guard configuration
D) on the local storage at the observer location
E) on the shared storage at the standby location

3. Which three statements are correct regarding ASM instances in a RAC environment? (Choose three.)

A) ASM instances must all have the same value for ASM DISKGROUPS.
B) ASM instances can use different values for ASM_POWER_LIMIT.
C) ASM instances can mount different sets of disk groups.
D) ASM instances recognize their disks by looking at their headers.
E) ASM instances must all have the same value for ASM_DISKSTRING.

4. 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 prooducts_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) Encourage shorter transactions.
B) Increase the sequence cache size if retaining the sequence.
C) Re-create the table using a natural key instead of a surrogate key.
D) Set fast_start_mttr_target to a higher value.
E) Set _lm_msg_batch_size to a higher value.
F) Re-create the index as a global hash partitioned index.

5. You defined the HR service using the following command:
srvctl add service -d RACDB -s HR -r RAC02.RAC03 -a RAC01
After a while, you realize that there is a workload peak on the HR service, and you decide to temporarily start HR on the RAC04 instance.
Which command or series of commands would you use to start HR on RAC04?

A) srvctl remove service -d RACDB -s HR Srvctl add service -d RACDB -s Hr-r RAC02.RAC03.RAC04 -a RAC01 srvctl start service -d RACDB -s HR
B) srvctl modify service -d RACDB -s HR -i RAC02.RAC03.RAC04 -a RAC01 srvctl stop service -d RACDB -s HR srvctl start service -d RACDB -s HR
C) srvctl modify service -d RACDB -s HR -i RAC02.RAC03.RAC04 -a RAC01
D) srvctl start service -d RACDB -s HR -i RAC04
E) srvctl remove service -d RACDB -s HR Srvctl add service -d RACDB -s Hr-r RAC02.RAC03.RAC04 -a RAC01

Solutions: