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Oracle Database 10g R2: Administering RAC Sample Questions:

1. You define the ERP service using this statement:
srvctl add service -d RACDB -s ERP -r RAC01 -P PRECONNECT srvctl start service -d RACDB -s
ERP
You then use this connect string to connect to your RAC instances:
ERP =
(DESCRIPTION =(FAILOVER=ON)(LOAD_BALANCE=ON)
(ADDRESS=(PROTOCOL=TCP)(HOST=N1 VIP)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=N2VIP)(PORT=1521))
(CONNECTJDATA = (SERVICE_NAME = ERP)
(FAILOVER_MODE =
(BACKUP=ERP_PRECONNECT)(TYPE=SESSION)(METHOD=PRECONNECT))))
You successfully establish a connection to your RAC database using the above connect string.
How many connections are established, and on which instances?

A) only one on RAC01
B) two on RAC02
C) two on RAC01
D) one on RAC01 and one on RAC02

2. Which optional parameter of the DESCRIPTION clause of a TNS entry can you use to make sure that another protocol address is tried if the first one fails?

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

3. You are the administrator of a Linux-based Oracle cluster. To meet your company's disaster recovery requirements, you have to make backups of the OCR to a tape device. What are your options? (Choose all that apply.)

A) Use your favorite tape backup command to back up the OCR from disk to tape.
B) Use the OCRCONFIG command to have CRSD write the OCR backup to tape for you.
C) Use the Linux DD command to write the OCR directly to tape.
D) Use RMAN to back up the OCR from disk to tape.
E) Use your favorite tape backup command to back up the physical OCR backups from disk to tape.

4. Which two views can be used to identify SQL statements affected by interconnect latencies in your RAC environment? (Choose two.)

A) the V$SQL_PLAN view
B) the VJSQL view
C) the VJSQLAREA view
D) the VJSQL CURSOR view
E) the VJSQLTEXT view

5. 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 from the BATCH 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) 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.
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.

Solutions: