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Oracle Database 10g R2: Administering RAC Sample Questions:

1. 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 products_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) Set fast_start_mttr_target to a higher value.
E) Re-create the table using a natural key instead of a surrogate key.
F) Encourage shorter transactions.

2. Which three statements about patching Oracle products in a clustered environment are true? (Choose three.)

A) The OUI automatically manages the patch installation progress, including the copying of files to remote nodes, just as it does with the CRS and database binary installations.
B) The Oracle Universal Installer (OUI) is cluster-aware and able to manage patches on all nodes in your cluster.
C) OUI prevents potentially destructive concurrent patch installations through the use of Inventory List Locks.
D) OUI manages patches in a clustered environment only if a shared ORACLEJHOME is employed.

3. Your company has certain standard practices for technology and you are configuring ASM disk groups for your four-node RAC cluster. The company guidelines suggest that there is one disk group for the flash recovery area that is shared by all databases and a separate disk group for the database area of all databases. Which three exceptions exist that may require you to create additional disk groups? (Choose three.)

A) Some database instances are shut down every night while others are always running.
B) Applications using the databases have different Service-Level Agreements for response time and throughput.
C) There are partitioned tables where the older partitions are in read-only tablespaces and seldom accessed, but the more recent partitions are frequently accessed.
D) Some databases operate in ARCHIVELOGMODE and others in NOARCHIVELOGMODE.
E) The retention policy for backups are different for different databases.
F) The disk farm has different disk models with different characteristics and ages.
G) There are large nonpartitioned tables accessed frequently using indexes.

4. Read the following statements about the ASM and OCFS file systems:
1) t is compatible with Oracle 9i and Oracle 10g.
2) t is one of the solutions for managing Oracle binaries in a RAC environment.
3) t relies on storage hardware or host-based RAID functionality to support high availability.
4) t is a shared storage file system designed to eliminate the need for raw partitions to store
certain files.
5) t is has integrated volume management with superior extent-based striping and mirroring.
6) t is a cluster file system with a volume manager built into the Oracle 10g kernel to manage
Oracle database files.
Identify the correct grouping where Group A represents true statements about ASM and Group B
represents true statements about OCFS.

A) 1 3,4 Group B: 3 4,5
B) Group A: 5 6 Group B: 1 2,3,4
C) 3 4 Group
D) 2 3,4 Group
E) Group
F) 1 5,6
G) Group
H) Group
I) 1 2,5,6

5. Which two statements about the correct configuration of the flash recovery area in a RAC environment are true? (Choose two.)

A) Set the DB_RECOVERY_FILE_DEST_SIZE initialization parameter to the same value on all instances.
B) Set the DB_RECOVERY_FILE_DEST initialization parameter to the same value on all instances.
C) Set the flash recovery area size to no smaller than 20 GB.
D) The use of a common flash recovery area is not recommended on clusters containing more than four nodes.

Solutions: