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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) 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.
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) Tune SQL for the OLTP and DSS service programs because they may benefit from SQL tuning.
E) Tune SQL from the BATCH service programs because they may benefit from SQL tuning.

2. Which three statements are correct regarding ASM instances in a RAC environment? (Choose three.)

A) ASM instances can mount different sets of disk groups.
B) ASM instances can use different values for ASM_POWER_LIMIT.
C) ASM instances must all have the same value for ASM DISKGROUPS.
D) ASM instances must all have the same value for ASM_DISKSTRING.
E) ASM instances recognize their disks by looking at their headers.

3. View the Exhibit and examine a database software installation step in a RAC environment.
Which statement about the path is true?

A) You should specify a path under ORACLE_BASE where Oracle product is to be installed.
B) You must specify the same path that you specified to install ASM.
C) You must specify the same path where Oracle clusterware is installed.
D) You must specify the location of Oracle inventory.
E) You should specify the same path that you specified for the ORACLE_BASE environment variable.
F) You must specify the location of the OCR file.

4. Which four statements contain accurate information regarding RAC VIPs and application VIPs? (Choose four.)

A) It is recommended to share application VIPs among multiple applications.
B) An application VIP fails over if the associated application fails over.
C) It is recommended to share a RAC VIP among several database instances.
D) It is not recommended to share a RAC VIP among several database instances.
E) A RAC VIP fails over if the listener fails.
F) It is not recommended to share an application VIP among several applications.
G) A failed over RAC VIP does accept new connections.
H) A failed over application VIP does accept new connections.

5. Which three statements about quiescing a RAC database are true? (Choose three.)

A) Use the ALTER SYSTEM QUIESCE RESTRICTED statement from a single instance.
B) It is possible to take a cold backup while the database is in a quiesced state.
C) The database cannot be opened from another instance until the ALTER SYSTEM QUIESCE?statement finishes execution.
D) The ALTER SYSTEM QUIESCE RESTRICTED and ALTER SYSTEM UNQUIESCE statements affect all instances in a RAC environment.

Solutions: