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Oracle Database 10g R2: Administering RAC Sample Questions:

1. You want check whether the group services node application is running on all the nodes in your cluster before you create a cluster database. Which utility can you use to make sure the node application is running on all nodes in the cluster?

A) crs_stat
B) addnode.sh
C) onsctl
D) crsctl
E) Isnrctl

2. You are about to bring your Web server under control of the Oracle Clusterware to make it highly available. Which actions do you need to perform to accomplish this task? (Choose all that apply.

A) Write an action script that Oracle Clusterware would use to start, stop, and check the status of an application.
B) Create an application profile using crs_profile, register it with crs_register, set its permission with crs_setperm, and then start it with crs_start.
C) Create an application VIP profile using crs_profile, register it with crs_register, set its permission with crs_setperm, and then start it using crs_start.
D) Once done, manage the Web server with SRVCTL
E) Have the system administrator create an application VIP at the operating system level for you to use with the application.

3. In which directory should you put your callout scripts on your RAC nodes?

A) JORACLE_HOME/racg/usrco/
B) $ORA_CRS_HOME/racg/usrco/
C) $ORA_CRS_HOME/opmn/conf/
D) $ORACLE_HOME/opmn/conf/

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

5. You are asked by the DBA team leader to consolidate three different Oracle databases, which supported three separate workloads, into one large three-instance RAC database on a three-node cluster. You also need to create a separate service to represent each workload type and support client-side load balancing. The CRM service has two preferred instances, the HR service has two, and the ORDERS service
has only one. Any instance may be used as an vailable instance for any service that is not
specified as a preferred service for that same instance. You decide to create three separate
entries in TNSNAMES.ORA.
Choose three options describing the number of entries you would have in each address list.
(Choose three.)

A) three entries in the address list for the ORDERS service pointing to the listeners on all three nodes
B) two entries for the address list for the HR service for the listeners on the nodes containing the preferred instances for HR
C) one entry for the address list for the ORDERS service for the listeners on the nodes containing the preferred instance for ORDERS
D) two entries for the address list for the CRM service pointing to the listeners on the nodes containing the preferred instances for CRM
E) three entries in the address list for the CRM service for the listeners on all three nodes
F) three entries in the address list for the HR service for the listeners on all three nodes

Solutions: