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Exam : Oracle 1Z0-048
Title : Oracle Database 10g R2: Administering RAC


1. You have a two-node cluster (RDBD1, +ASM1 on ed-rac1and RDBD2, +ASM2 on node ed-rac2). Which two utilities would you use to check the OCR integrity? (Choose two.)
A.crsctl
B.cluvfy
C.crs_stat
D.ocrcheck
Answer: BD

2. Which statement regarding Clusterware is false?
(Choose the false statement.)
A.Oracle Clusterware is installed using the Oracle Universal Installer (OUI).
B.The ORA_CRS_HOME directory must not be the same as the ORACLE_HOME directory.
C.The Oracle Database 10g Clusterware stack is compatible with Oracle 9i Group Services (GSD) processes.
D.The installation of Oracle Clusterware is mandatory even if you have installed vendor-specific clusterware.
Answer: C

3. What are two ways of knowing if a patch can be applied in a rolling fashion in your RAC environment? (Choose two.)
A.Use the opatch query command.
B.Use the opatch attach command.
C.Use the opatch rollback command.
D.Use the opatch lsinventory command.
E.The patch does not modify the data dictionary.
F.Look at the patch's inventory file and look for set to TRUE.
Answer: AF

4. Read the following statements about the ASM and OCFS file systems:
1) It is compatible with Oracle 9i and Oracle 10g.
2) It is one of the solutions for managing Oracle binaries in a RAC environment.
3) It relies on storage hardware or host-based RAID functionality to support high availability.
4) It is a shared storage file system designed to eliminate the need for raw partitions to store certain files.
5) It is has integrated volume management with superior extent-based striping and mirroring.
6) It is a cluster file system with a volume manager built into the Oracle 10g kernel to manage Oracle database files.
Identify the correct grouping where Group A represents true statements about ASM and Group B represents true statements about OCFS.
A.Group A: 2, 3, 4
Group B: 1, 5, 6
B.Group A: 1, 3, 4
Group B: 3, 4, 5
C.Group A: 5, 6
Group B: 1, 2, 3, 4
D.Group A: 3, 4
Group B: 1, 2, 5, 6
Answer: C

5. Which two statements regarding Oracle Clusterware are correct? (Choose two.)
A.The Oracle Database 10g version of the srvConfig.loc file is the ocr.loc file.
B.The Oracle9i srvConfig.loc file still exists for backward compatibility in Oracle Database 10g.
C.The Oracle Database 10g CRS stack is compatible with Oracle 9i Group Services (GSD) processes.
D.The installation of Oracle Clusterware is not necessary if you have already installed vendor-specific clusterware.
Answer: AB

6. What is true about Virtual Internet Protocol Configuration Assistant (VIPCA)?
A.The VIPCA application must be run manually on all nodes in the cluster.
B.Each Virtual IP (VIP) configured requires an unused and resolvable IP address.
C.The VIP for each node should be bound to the adapter that is acting as the private interconnect.
D.The ifconfig -a command is used to back out a faulty VIPCA configuration.
Answer: B

7. 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.Tune SQL for the OLTP and DSS service programs because they may benefit from SQL tuning.
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.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.
Answer: AD

8. Read the following statements about a file system:
1) It is compatible with Oracle 9i and Oracle 10g.
2) It is one of the solutions for managing Oracle binaries in a RAC environment.
3) It relies on storage hardware or host-based RAID functionality to support high availability.
4) It is a shared storage file system designed in such a way that you can avoid setting up of raw partitions to store certain files.
Which file system corresponds to these features?
A.ext2
B.NFS
C.ASM
D.NTFS
E.OCFS2
Answer: E

9. Richard is a senior DBA and has prepared a plan for RAC implementation in his company. Given below are some of the tasks that he would perform as part of the plan:
1) Creating the Raw Devices Mapping file
2) Creating database services
3) Binding the partitions to raw devices
4) Creating the Voting Disk file
5) Creating an initialization parameter file
6) Creating the Oracle Cluster Registry (OCR) file
7) Creating the tnsnames.ora file
8) Creating the database control file
During the creation of the RAC database, Richard can use the Database Configuration Assistant (DBCA) to perform some of these steps but not all of them. Which steps should be completed before Richard starts creating the database by using DBCA?
A.2, 5, 7, 8
B.1, 3, 4, 6
C.3, 4, 6, 7, 8
D.2, 5, 6, 7, 8
E.1, 2, 4, 5, 6, 7
Answer: B

10. When do you get the first notification after you execute the following command on instance RDBA1?
exec DBMS_SERVER_ALERT.SET_THRESHOLD(-
METRICS_ID => dbms_server_alert.elapsed_time_per_call,
WARNING_OPERATOR => dbms_server_alert.operator_ge,
WARNING_VALUE => '500000',
CRITICAL_OPERATOR => dbms_server_alert.operator_ge,
CRITICAL_VALUE => '750000',
OBSERVATION_PERIOD => 15,
CONSECUTIVE_OCCURRENCES => 3,
INSTANCE_NAME => 'RDBA1',
OBJECT_TYPE => dbms_server_alert.object_type_service,
OBJECT_NAME => 'ERP');
A.when the average elapsed time per call for the ERP service over a 45-minute period exceeds 0.5 seconds
B.when the average elapsed time per call for the ERP service over a 45-minute period exceeds 0.75 seconds
C.when the average elapsed time per call for the ERP service over a 15-minute period exceeds 0.5 seconds three consecutive times
D.when the average elapsed time per call for the ERP service over a 15-minute period exceeds 0.75 seconds three consecutive times
Answer: C

11. The infrastructure team at your company is designing a Maximum Availability Architecture for your Oracle databases consisting of a four-node RAC cluster for the primary database with flashback database configured, and a two-node cluster for the standby database with flashback database configured. The standby database is in a separate location in another city. There are six services configured and clustered ASM is used for storage on the primary and the standby
Which two statements are true concerning this architecture? (Choose two.)
A.It protects against site failures after a switchover to the standby database.
B.It protects against instance failures after a switchover to the standby database.
C.It does not protect against node failures in case of a failover to the standby database.
D.It can help to prevent data corruptions before they happen on both the primary and the standby databases.
E.It does not provide for continuous availability of services in the event of a switchover to the standby database.
Answer: AB

12. To install Oracle Database 10g RAC on a UNIX platform, which four directories will you identify for use? (Choose four.)
A.NET_ADMIN directory
B.Oracle inventory directory
C.group services directory (GSD_HOME)
D.Oracle base directory (ORACLE_BASE)
E.CRS home directory (ORA_CRS_HOME)
F.Oracle home directory (ORACLE_HOME)
Answer: BDEF

13. A junior DBA is learning how to administer an Oracle Cluster and asks you how to diagnose voting disk online and offline problems, and where to find information on voting disk online and offline messages.
What would you advise this junior colleague?
A.There is no method to get this type of information.
B.Use evmwatch to make this kind of information visible.
C.Enable CSS debugging by using CRSCTL to make this information available.
D.Write a shell script that writes the output of crsctl query css votedisk to a file on a regular basis.
E.Look in the alert_.log file in the unified message and the tracefile directory in ORA_CRS_HOME because the Oracle Clusterware logs this kind of information by default.
Answer: E

14. Using Oracle Database 10.2 Enterprise Edition, you can create and configure a new ASM instance for a new RAC cluster using which two tools? (Choose two.)
A.CRSCTL
B.ASMCMD
C.Oracle Universal Installer (OUI)
D.Enterprise Manager Grid Control
E.Database Configuration Assistant (DBCA)
F.Enterprise Manager Database Control
Answer: CE