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Oracle Database 10g R2: Administering RAC Sample Questions:

1. View the Exhibit and examine an installation step of Oracle Enterprise Manager Grid Control 10gR2 to manage your RAC installation. You entered the host name but you are not sure about the port number. Thefollowing is the list of port numbers from the host ed-otraclin17b.us.oracle.com:

A) 4889
B) 1521
C) 1158
D) 3938
E) 5561

2. You are requested to make your Web server, which accesses a clustered Oracle database, highly available. Which solution would you propose?

A) Bring your Web server under control of the Oracle Clusterware and use the RAC VIP address to reach your Web server from your clients.
B) Bring your Web server under control of the Oracle Clusterware and use the public IP address to reach your Web server from your clients.
C) Bring your Web server under control of the Oracle Clusterware and use an application VIP address to reach your Web server from your clients.
D) Bring your Web server under control of the Oracle Clusterware and use the private IP address to reach your Web server from your clients.
E) Because you cannot use Oracle Clusterware to protect your Web server, you come up with an operating system solution.

3. You need to add a new service to your RAC database, called DBA, to account for all the work done by database administrator sessions performing routine maintenance, to make this visible in the v$service_stats view. The maintenance would be done at quieter times but restricted session is not an option due to round-the-clock access requirements. The database administration team may connect locally or remotely to the RAC database. You decide to use DBCAto create the new service.
What must be true to allow client-server connection to the DBA service? (Choose two.)

A) The service must have at least one preferred or available instance that is running and accepting logins.
B) The service must be started using the DBMS_SERVICE.START_SERVICE procedure.
C) The services must be started using the SRVCTL START SERVICE command.
D) The ALTER SYSTEM REGISTER command must be used to induce PMON to register the service with the listeners.
E) All the listeners must be reloaded using LSNRCTL RELOAD to recognize the dynamically created service.
F) The TNSNAMES.ORAfile or a name server must contain the net service entries for the DBA service.

4. You have a four-node cluster with instances RDBD1, RDBD2, RDBD3, and RDBD4. While evaluating statspack reports, you find nq: TX- index contention on page one under the category op 5 Timed Events.
Further study finds an unusually high number of c buffer busy waits in the Wait Events section. Checking the Instance Activity Stats section, you see an unusually high value for eaf Node Splits. Using v$segment_statistics, you identify that the top segment with c buffer busy waits is the index prooducts_pk, which obtains the primary key from a sequence. You wish to present alternative solutions to the team to help reduce contention.
Which three actions would you recommend to reduce the overheads? (Choose three.

A) Re-create the index as a global hash partitioned index.
B) Set _lm_msg_batch_size to a higher value.
C) Re-create the table using a natural key instead of a surrogate key.
D) Set fast_start_mttr_target to a higher value.
E) Encourage shorter transactions.
F) Increase the sequence cache size if retaining the sequence.

5. Which three statements regarding backup of the voting disk are true? (Choose three.)

A) Whenever a voting disk backup is made, the Clusterware software should be stopped on all nodes in the cluster.
B) A backup of the voting disk should be taken whenever a new node is added to the cluster.
C) A backup of the voting disk should be taken whenever an RMAN catalog reset is done.
D) On UNIX platforms, the voting disk can be backed up with the dd command.
E) A backup of the voting disk should be taken whenever an existing node is removed from the cluster.

Solutions: