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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) Tune SQL from the BATCH service programs because they may benefit from SQL tuning.
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) 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.

2. When an ASM instance initializes, ASM discovers and examines the contents of all the disks that are in the paths designated in the ASM_DISKSTRING initialization parameter. Under which four other circumstances does disk discovery take place? (Choose four.)

A) when you query VJASMjDPERATION
B) when you run ALTER DISKGROUP...ADD DISK
C) when you query V$ASM_DISK
D) when you query V$ASM_DISKGROUP
E) when you run ALTER DISKGROUP...RESIZE DISK

3. You are about to build a new Oracle Clusterware-based cluster and you want to make the installation process as smooth as possible. You decide to use the Cluster Verification Utility (CLUVFY) to check whether or not your system administrator has set up the hardware and system software correctly. Which two statements about CLUVFY are true? (Choose two.)

A) After the Oracle Clusterware installation, you can run CLUVFY from the Oracle Home that holds the CRS binaries.
B) You can run CLUVFY directly from the Oracle Clusterware distribution media.
C) CLUVFY cannot be used until the Oracle Clusterware is installed successfully.
D) You have to install CLUVFY on all cluster nodes in order to use CLUVFY on other nodes than the one from which you perform the installation.
E) You can run CLUVFY only from a privileged operating system account.
F) To use CLUVFY during the Oracle Clusterware installation, you have to download CLUVFY from the Oracle Technology Network (OTN) Web site and install it before you can use it.

4. What does your client connection do using this connect string?
n et_s e rvi c e_n a m e=
(DESCRIPTION
(LOAD_BALANCE=on)
(ADDRESS=(PROTOCOL=tcp)(HOST=sales1 -svr-vip)(PORT=1521))
(ADDRESS=(PROTOCOL=tcp)(HOST=sales2-svr-vip)(PORT=1521)))
(CONNECT_DATA=(SERVICE_NAME=sales. us. acme, com))

A) It connects you to the instance on the least loaded node that currently accepts logins for the SALES.US.ACME.COM service.
B) It connects you to the least loaded instance.
C) It randomizes its connection request on the available listeners.
D) It connects you to the least loaded node.

5. 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 RMAN 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 your favorite tape backup command to back up the physical OCR backups from disk to tape.
D) Use the Linux DD command to write the OCR directly to tape.
E) Use your favorite tape backup command to back up the OCR from disk to tape.

Solutions: