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Oracle Database 10g R2: Administering RAC Sample Questions:

1. Over a six-month period, you have been regularly monitoring your four-instance RAC database,
which is running on the first 4 nodes of a 6-node cluster, by using ADDM and by monitoring well-
known combinations of wait event and statistics in AWR reports.
Two weeks ago, a newer version of your main application went live. Starting last week, you
noticed a large increase in CPU time (consumed by the three application services on your RAC
database) due to increased workload.
The OLTP and DSS services have not had a decrease in the percentage of time spent using CPU.
However, for the BATCH service the percentage of time spent using CPU has gone down and the
wait-time percentage has increased.
You want to recommend a tuning exercise to your team. Which two recommendations would you
make first, based on the symptoms described? (Choose two.)

A) The OLTP and DSS service programs may scale well and could benefit from adding new database instances on one or both of nodes 5 and 6, and by adding more nodes the SQL for BATCH service programs would perform better due to more CPU power.
B) Tune SQL from the BATCH service programs because they may benefit from SQL tuning.
C) The BATCH service programs may scale well and could benefit from adding new database instances on either node 5 or 6, or on both.
D) The OLTP and DSS service programs may scale well and could benefit from adding new database instances on either node 5 or 6, or on both.
E) Tune SQL for the OLTP and DSS service programs because they may benefit from SQL tuning.

2. Which statement regarding Clusterware is false? (Choose the false statement.)

A) The Oracle Database 10g Clusterware stack is compatible with Oracle 9i Group Services (GSD) processes.
B) Oracle Clusterware is installed using the Oracle Universal Installer (OUI).
C) The ORA_CRS_HOME directory must not be the same as the ORACLEJHOME directory.
D) The installation of Oracle Clusterware is mandatory even if you have installed vendor-specific clusterware.

3. You execute the following command from the first node of your cluster: crsctl add ess votedisk /dev/raw/raw9
However, you get an error message indicating that Oracle Clusterware stack is not started. Which command would you execute?

A) crsctl add ess votedisk /dev/raw/raw9 -force
B) crsctl enable crs Crsctl add ess votedisk /dev/raw/raw9 -force
C) crsctl start crs Crsctl add ess votedisk /dev/raw/raw9
D) crsctl enable crs Crsctl add ess votedisk /dev/raw/raw9
E) crsctl start crs Crsctl add ess votedisk /dev/raw/raw9 -force

4. 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) Isnrctl
C) onsctl
D) addnode.sh
E) crsctl

5. What should you do when creating a disk group that would store your RAC database?

A) Make sure that all database instances are functional.
B) Make sure that all database instances are running in restricted mode.
C) Make sure that ASM targets are accessible from Database Control.
D) Make sure that the disk group is mounted by all ASM instances.

Solutions: