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Question ID 2093

Which four statements are true about services and connection load balancing?

Option A

A.    Services provide the ability to balance client connections across the instances in an Oracle RAC configuration.
 

Option B

B.    There are two types of load balancing that you can implement; load balancing decisions can be made by the client and by the listener.

 

Option C

C.    In a RAC database environment, you should select only one load balancing method.
 

Option D

D.    With server-side load balancing, the listener directs a connection request to the best instance that is currently providing the service based on the load-balancing options selected by the DBA.
 

Option E

E.    Client-side load balancing balances the connection requests across the listeners.

Correct Answer A,B,D,E
Explanation


Question ID 2094

You are managing a three-instance policy-managed RAC database PROD. You created a service called GL for the PROD database by using the following command:
[oracIe@gr7597~]$ srvctl add service -d PROD -s GL -g SP1 -c singleton -y manual
Examine the following output:
[oracIe@gr7597~]$ srvctl config database -d PROD -a
Database unique name: PROD
Database name: PROD
Oracle home: /u01/app/oracle/product/11.2.0/dbhome_1
Oracle user: oracle
Spfile: +DATA/PROD/spfileRACDB.ora
Domain:
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: SP1
Database instances:
Disk Groups: DATA, FRA
Services:
Database is enabled
Database is policy managed
[oracIe@gr7597~]$ crsctl stat res ora.PROD.db
NAME=ora.PROD.db
TYPE=cluster_resource
TARGET=ONLINE
STATE=ONLINE on gr7597 ONLINE on gr7602 ONLINE on gr7633
[oracIe@gr7597~]$ crsctl stat serverpool ora.SP1
NAME=ora.SP1
ACTIVE_SERVERS=gr7597 gr7602 gr7633
[oracle®gr7597-]$ crsctl stat res ora.prod.gl.svc
NAME=ora.prod.gl.svc
TYFE=ora.service.type
TARGET=ONLINE
STATE=ONLINE on gr7597
Which three steps are required to enable ODP.NET clients that connect to the GL service to receive FAN High Availability Events?
 

Option A

A.    Enable Advanced Queuing notifications by using SRVCTL as shown in the following command: $ srvctl modify service -d prod -s gl -q TRUE -j LONG
 

Option B

B.    Execute the following statement for the users that will be connecting by way of the .Net Application, where user_name is the user name:
EXECUTE DBMS_AQADM.GRANT_QUEUE_PRIVILEGE( 'DEQUEUE', '
SYS.SYS$SERVICE_METRICS', user_name ) ;
 

Option C

C.    Enable Transparent Application Failover (TAF), either on the client or for the service.
 

Option D

D.    Enable Fast Connection Failover for ODP.NET connection pools by subscribing to FAN High Availability events. Do this by setting the HA events connection string attribute to true at
connection time.
 

Option E

E. Link client applications with the client thread or operating system library.
 

Correct Answer A,B,D
Explanation

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