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Oracle 1Z0-048 - Questions & Answers

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Question 1
Single choice

Which optional parameter of the DESCRIPTION clause of a TNS entry can you use to randomize the access to available listeners?

A.

FAILOVER

B.

LOAD_BALANCE

C.

SOURCE_ROUTE

D.

TYPE_OF_SERVICE

Question 2
Single choice

You are working as a DBA in a RAC environment that is available for testing. The RAC environment has all the database files stored in the OCFS file system. You plan to install ASM and move all the database files to ASM to achieve better performance. During the installation, you selected redundancy level as normal for the disk group being added.

What is the reason for selecting this redundancy level?

A.

You want to use hardware mirroring.

B.

You do not want to have any mirroring in the disk group.

C.

You have two failure groups defined, so you want to use two-way mirroring.

D.

You have three failure groups defined, so you want to use three-way mirroring.

Question 3
Multiple choice

You are running a two-instance database with six redo log groups defined and decide to add a third thread to support a third database instance on the third node of the cluster.

Which three commands would you issue to achieve this using command line administration? (Choose three.)

A.

ALTER SYSTEM ENABLE THREAD 3;

B.

ALTER DATABASE ENABLE THREAD 3;

C.

ALTER SYSTEM ADD LOGFILE THREAD 3 GROUP 8;

D.

ALTER SYSTEM ADD LOGFILE THREAD 3 GROUP 7;

E.

ALTER DATABASE ADD LOGFILE THREAD 3 GROUP 7;

F.

ALTER DATABASE ADD LOGFILE THREAD 3 GROUP 8;

Question 4
Single choice

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.

LOCAL_LISTENER

B.

REMOTE_LISTENER

C.

REMOTE_DEPENDENCIES_MODE

D.

PREFER_LEAST_LOADED_NODE_<listener-name>

Question 5
Multiple choice

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.

Interconnect latency

B.

Instance recovery time

C.

Services with applications that use external tables

D.

Services with applications that truncate large tables

E.

Services with applications using local context variables

F.

Services with query-intensive applications relying on full table scans

G.

Services with insert-intensive applications that use Oracle sequences for index keys

H.

Services with applications that have occasional queries, using index access on modestly sized tables

I.

Services with insert-intensive applications that generate their own keys without Oracle sequences

Question 6
Multiple choice

After a power failure, you noticed that one of your cluster database instances did not start automatically, whereas all other instances came up successfully.

What would you do to determine the precise cause for the instance startup failure? (Choose three.)

A.

Check the resource state by using the CRS_STAT command.

B.

Check for OCR corruptions by using the OCRCHECK command.

C.

Check the alert.log file that belongs to the instance that did not start.

D.

Check the alert.log file that belongs to the Oracle Clusterware software.

E.

Check if the Oracle Clusterware is functional by using the CRSCTL command.

F.

Reboot the node where the failing instance resides to check if the problem is persistent.

G.

Enable extra debugging in the Oracle Clusterware software by using the CRSCTL command.

Question 7
Multiple choice

View the Exhibit, which displays the cluster database performance page after the same workload has been executed three times on your cluster without varying any non-Oracle workloads on the cluster.

What are the two ways by which you can tell that the corresponding application was better tuned during the second and third execution? (Choose two.)

A.

There is less paging each time.

B.

The run queue length is going down each time.

C.

It takes less time to execute the workload each time.

D.

The number of transactions per second is getting higher each time.

E.

The database throughput graphic is below the red dashed line during the last execution.

Question 8
Multiple choice

Which three storage types are suitable as a flash recovery area for an Oracle 10g RAC database? (Choose three.)

A.

Raw volume

B.

ASM disk group

C.

Local file system

D.

Cluster file system

E.

Shared NFS directory

Question 9
Multiple choice

After the cluster database has been successfully created, several postinstallation tasks should be completed. Identify three of them. (Choose three.)

A.

Create the ASM instance.

B.

Back up the root.sh script.

C.

Initialize the cluster backup procedure.

D.

Set up additional required user accounts.

E.

Verify the Enterprise Manager/Oracle Cluster Registry configuration by running srvctl config database - d db_name.

Question 10
Multiple choice

Oracle Cluster Registry (OCR) can be recovered on a UNIX platform using which two commands? (Choose two.)

A.

ocrconfig -import /u01/logical_ocr/yesterday.ocr where yesterday.ocr is an automatically generated
OCR backup

B.

ocrconfig -import /u01/logical_ocr/yesterday.ocr_exp where yesterday.ocr_exp is a logical backup created using the ocrconfig -export command

C.

cp /app/oracle/product/10.1.0/crs_1/cdata/dbclust01/day.ocr /ocfs/OCR/crs.dbf where /ocfs/OCR/ crs.dbf is the cluster registry file

D.

ocrconfig -restore /app/oracle/product/10.1.0/crs_1/cdata/dbclust01/day.ocr where day.ocr is an
automatically generated OCR backup

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