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Oracle Database 10g R2: Administering RAC 認定 1Z0-048 試験問題:

1. Your company is about to switch from one Internet Service Provider (ISP) to another, and this change of ISP comes along with a whole new set of network addresses. Your job is to change the VIP addresses of your company's Oracle Cluster.
How would you apply this change?

A) Change the VIP addresses in DNS and the cluster would pick up the new addresses automatically.
B) Stop all VIP-dependent components on all cluster nodes, make the necessary changes in DNS, and then restart all VIP-dependent components.
C) Stop all VIP-dependent cluster components on one node, make the necessary changes in DNS, change the VIP using SRVCTL, restart all VIP-dependent components, and then perform these steps on al the remaining nodes one at a time.
D) Change the VIP addresses on the cluster using SRVCTL while the cluster is fully functional.
E) Reinstall the Oracle Clusterware layer of your cluster.

2. You have a well-tuned, non-RAC single instance Oracle database with several services, all of which perform perfectly. You plan to migrate the database to RAC in the next two weeks and all file systems would be shared using Oracle Cluster File System. After the migration, you want to perform a test to monitor RAC-specific tuning issues that would not have occurred on a non-RAC database. Which six areas would you monitor to determine whether there are RAC-specific performance problems after migration? (Choose six.)

A) Services with query-intensive applications relying on full table scans
B) Services with applications that truncate large tables
C) Services with applications that have occasional queries, using index access on modestly sized tables
D) Interconnect latency
E) Instance recovery time
F) Services with applications using local context variables
G) Services with insert-intensive applications that generate their own keys without Oracle sequences
H) Services with insert-intensive applications that use Oracle sequences for index keys
I) Services with applications that use external tables

3. 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) one on RAC01 and one on RAC02
C) two on RAC01
D) two on RAC02

4. Your company has certain standard practices for technology and you are configuring ASM disk groups for your four-node RAC cluster. The company guidelines suggest that there is one disk group for the flash recovery area that is shared by all databases and a separate disk group for the database area of all databases. Which three exceptions exist that may require you to create additional disk groups? (Choose three.)

A) There are partitioned tables where the older partitions are in read-only tablespaces and seldom accessed, but the more recent partitions are frequently accessed.
B) The retention policy for backups are different for different databases.
C) Some databases operate in ARCHIVELOGMODE and others in NOARCHIVELOGMODE.
D) There are large nonpartitioned tables accessed frequently using indexes.
E) Some database instances are shut down every night while others are always running.
F) The disk farm has different disk models with different characteristics and ages.
G) Applications using the databases have different Service-Level Agreements for response time and throughput.

5. Which initialization parameter would you use for each RAC instance to make sure that each listener on each RAC node is aware of the load of all the others?

A) REMOTE_DEPENDENCIES_MODE "
B) LOCALJJSTENER
C) REMOTEJJSTENER
D) PREFER LEAST LOADED NODE <listener-name>

質問と回答：