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Oracle Database 10g R2: Administering RAC Sample Questions:

1. You are migrating a single-instance Oracle database to RAC. The data files and Flash Recovery Area would be migrated to ASM using the RMAN commands BACKUP AS COPY DATABASE and BACKUP RECOVERY AREA, and stored in an ASM diskgroups called +DB_DG and +FR_DG. The DB_CREATE_FILE_DEST parameter would be set to +DB_DG and the DB_RECOVERY_FILE_DEST parameter would be set to +FR_DG.
What are the three best options for the location of your archivelogs so that they may be used properly for recovery without DBA intervention? (Choose three.)

A) ASM diskgroup +DB_DG as specified for the Database Area provided that the ASM diskgroup is mounted on all ASM instances.
B) Local File System with each instance writing to a local location provided that the path names are identical on all nodes.
C) Cluster File System with each instance writing to a separate location as long as they are in directories under the same mount point.
D) Local File System with each instance writing to a local location provided that NFS read mount points are created to all other nodes with instances of the database.
E) Cluster File System with each instance writing to a shared location.
F) ASM diskgroup +FR_DG as specified for the Flash Recovery Area provided that the ASM diskgroup is mounted on all ASM instances.

2. Which statement is true?

A) You must use RMAN to migrate your online redo log files to ASM storage.
B) You must use RMAN to migrate your change-tracking file to ASM storage.
C) You can migrate your entire database to ASM storage without shutting down your database.
D) You must use RMAN to migrate your data files to ASM storage.
E) You must use RMAN to migrate yourtempfiles to ASM storage.
F) You must use RMAN to migrate your flashback log files to ASM storage.

3. 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 require OCFS to store archive log files because ASM does not support these files.
B) You do not want to store any file other than voting and OCR files in ASM.
C) You want to avoid keeping Oracle binaries on local storage.
D) You do not want to use raw devices to store voting and OCR files.
E) You want to use the Oracle Managed Files (OMF) feature but that is not supported by ASM.

4. 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
B) srvctl modify service -d RACDB -s HR -i RAC02.RAC03.RAC04 -a RAC01
C) 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
D) 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
E) srvctl start service -d RACDB -s HR -i RAC04

5. 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) Set _lm_msg_batch_size to a higher value.
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) Re-create the index as a global hash partitioned index.
F) Increase the sequence cache size if retaining the sequence.

Solutions: