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Oracle Database 10g R2: Administering RAC Sample Questions:

Question 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. Tune SQL for the OLTP and DSS service programs because they may benefit from SQL tuning.
B. The BATCH service programs may scale well and could benefit from adding new database instances on either node 5 or 6, or on both.
C. Tune SQL from the BATCH service programs because they may benefit from SQL tuning.
D. 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.
E. 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.

Question 2

Several steps must be followed to successfully add a node to your cluster database. Assuming that a UNIX platform is used, which of the steps listed below is not correct? (Choose the incorrect step.

A. Add the node to the cluster using the addnode.sh script run from ORA_CRS_HOME.
B. Reconfigure listeners for the new node with netca.
C. Add instances via DBC
D. Add the RAC software to the new node using orainstRoot.sh from ORACLEJHOM
E. Configure the OS and hardware for the new node.

Question 3

For which two server metrics can you define thresholds for your services? (Choose two.)

A. SQL EXECUTE ELAPSED TIME
B. ELAPSED_TIME_PER_CALL
C. LOGICAL_READ_PER_CALL
D. CPU_TIME_PER_CALL
E. APPLICATION_WAIT_TIME
F. PHYSICAL_READ_PER_CALL

Question 4

Which optional parameter of the DESCRIPTION clause of a TNS entry can you use to randomize the access to available listeners?

A. TYPE OF SERVICE
B. FAILOVER
C. SOURCE_ROUTE
D. LOAD_BALANCE

Question 5

You are asked to investigate a problem regarding client connectivity between the HR service and a database, which is on a four-node RAC cluster. The HR service has four preferred instances on the RAC cluster. This cluster also supports five other services. Occasionally, a client-connect request for the HR service takes several minutes to connect, whereas the other five services connect within a second or two. Client-side and server-side connection load balancing are used for all the services. Which combination of network settings would explain these symptoms? (Choose two.)

A. The TNSNAMES. ORA file has an entry for the five other services that use the hostnames for the Virtual IP addresses and all the listeners listen on both the Public and Virtual IP addresses.
B. The TNSNAMES.ORA file has an entry for the HR service that uses only the host name for the public IP address, and all the listeners listen on both the Public and Virtual IP addresses.
C. The listener on one or more nodes is listening only on the Virtual IP address and the HR TNSNAMES entry uses the Hostnames for the Virtual IP addresses.
D. The TNSNAMES. ORA file has an entry for all six services that uses the host name for the Public IP address and not the Virtual IP address.
E. The listener on one or more nodes is listening on both the Public IP address and the Virtual IP address, and the HR TNSNAMES entry uses the Virtual IP address.

Solutions: