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Oracle 1Z0-048 Exam Syllabus Topics:

Oracle Database 10g R2: Administering RAC Sample Questions:

1. Which three statements regarding backup of the voting disk are true? (Choose three.)

A) A backup of the voting disk should be taken whenever a new node is added to the cluster.
B) A backup of the voting disk should be taken whenever an existing node is removed from the cluster.
C) Whenever a voting disk backup is made, the Clusterware software should be stopped on all nodes in the cluster.
D) A backup of the voting disk should be taken whenever an RMAN catalog reset is done.
E) On UNIX platforms, the voting disk can be backed up with the dd command.

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

3. 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.

4. You observe a high number of gc current failure on your RAC system. What could be causing this issue?

A) You are not using the correct private interconnect.
B) There is too much contention on the High Water Mark enqueue of your tables.
C) Too much parsing is occurring on your system.
D) Too much manual locking is occurring.

5. Which optional parameter of the DESCRIPTION clause of a TNS entry can you use to randomize the access to available listeners?

A) LOAD_BALANCE
B) SOURCE_ROUTE
C) TYPE OF SERVICE
D) FAILOVER

Solutions: