1Z0-048の無料問題集（150題）、1Z0-048認定試験参考書

Oracle 1Z0-048 問題集

試験コード：1Z0-048

試験名称：Oracle Database 10g R2: Administering RAC

最近更新時間：2025-02-15

問題と解答：全150問

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質問 1：
You define the ERP service using this statement:
srvctl add service -d RACDB -s ERP -r RAC01 -a RAC02 -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))
(CONNECT_DATA = (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. one on RAC01 and one on RAC02
B. two on RAC02
C. only one on RAC01
D. two on RAC01
正解：A

質問 2：
You are creating a database in your RAC implementation. You are using the DBCA to create the database, and you selected the Raw Devices Mapping file on one of the screens of the DBCA. What is the reason for selecting this file?
A. You want to provide the DBCA with a list of all the storage devices that are currently bound to a raw interface.
B. You want the DBCA to bind the partitions to raw devices.
C. You want to set the appropriate raw partition for each database file.
D. You want to configure an ASM diskgroup containing raw devices.
正解：C

質問 3：
You have attended a user group presentation on RAC and based on what you have learned you feel that your company would benefit from having the RAC option to meet its Oracle database requirements in several ways. Your manager does not know much about RAC and asks you to create a presentation to the team explaining RAC, and whether it should be implemented in your installation. Which three statements explain the benefits and implications of RAC? (Choose three.)
A. RAC alone would increase availability when doing release upgrades.
B. RAC would increase availability in the event of a network failure.
C. RAC used in conjunction with parallel execution may provide speedup of DSS queries.
D. RAC would increase availability in the event of data failures.
E. RAC alone would not help protect from human errors.
F. RAC would increase scalability for all application workloads in all cases.
G. RAC would increase availability in the event of node and instance failures.
H. RAC used in conjunction with parallel execution may provide for speedup of OLTP workload processes.
正解：C,E,G

質問 4：
Which statement regarding Clusterware is false? (Choose the false statement.)
A. The ORA_CRS_HOME directory must not be the same as the ORACLEJHOME directory.
B. The Oracle Database 10g Clusterware stack is compatible with Oracle 9i Group Services (GSD) processes.
C. The installation of Oracle Clusterware is mandatory even if you have installed vendor-specific clusterware.
D. Oracle Clusterware is installed using the Oracle Universal Installer (OUI).
正解：B

質問 5：
After adding two new high-performance nodes to your existing eight-node Oracle Database cluster, you decide to remove the two oldest nodes from your cluster. You start by removing the instances from the nodes you are about to remove by using the Database Configuration Assistant (DBCA). During the execution, a problem arises and the DBCA terminates with a fatal exception. Before you contact Oracle Support, you want to create a Java-based tool trace file so that Oracle Support can assist you in resolving this issue as quickly as possible. How would you create this trace file?
A. There is no need to do anything special because Java-based tool tracing is enabling by default for DBCA.
B. Request extra information by adding the -v (verbose) command-line flag at the DBCA command line.
C. Request extra information by adding the -d (debug) command line flag at the DBCA command line.
D. Set the SRVM_DEBUG environment variable to TRUE before you execute the DBCA command.
E. Set the SRVM_TRACE environment variable to TRUE before you execute the DBCA command.
F. Set the DEBUG environment variable to TRUE before you execute the DBCA command.
正解：A

質問 6：
In which directory should you put your callout scripts on your RAC nodes?
A. JORACLE_HOME/racg/usrco/
B. $ORA_CRS_HOME/opmn/conf/
C. $ORA_CRS_HOME/racg/usrco/
D. $ORACLE_HOME/opmn/conf/
正解：C

質問 7：
Your company has a combination of high availability and scalability requirements that need to be addressed, and RAC has been discussed as a solution. There are a mix of "off-the-shelf software products and homegrown applications currently in use in your environment that run on single-instance Oracle databases. You have been asked by the IT director to provide an impact analysis report to help assess the impact on applications when migrating to RAC. Which three are among the areas that should be examined for performance impact and application functionality impact or for both? (Choose three.)
A. applications that use SQL profiles created by the ATO optimizer in the SQL Tuning Advisor
B. three-tier applications that use application global context variables
C. client/server type applications that use application local context variables
D. applications that access small tables using the same index occasionally
E. applications that truncate tables in a data warehouse process
F. applications that use large parallel full table scans
正解：B,E,F

質問 8：
After a failed cluster database creation process, you realize that the contents of the OCR does not
match the current cluster configuration anymore. Before you started the database creation
process, you created a logical backup of the OCR, and now you want to use this logical backup to
bring the OCR contents in sync with the current cluster configuration.
Which commands would you use and in which order to accomplish this task?
1 OCRCONFIG -REPAIR (on the local cluster node only)
2 OCRCONFIG -REPAIR (on all cluster nodes)
3 OCRCONFIG -RESTORE <path name>
4 OCRCONFIG -IMPORT <path name>
5 CRSCTL STOP CRS (on the local cluster node only)
6 CRSCTL STOP CRS (on all cluster nodes)
7 OCRCONFIG -SHOWBACKUP
8 CRSCTL START CRS (on the local cluster node only)
9 CRSCTL START CRS (on all cluster nodes)
A. 7,6,4,9.
B. 7,6,3,2,9.
C. 7,6,3,9.
D. 5,3,8.
E. 5,4,8.
F. 6,4,9.
G. 6,3,9.
正解：F

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

1. Which three statements are true regarding RAC instance startup and shutdown using SQL'Plus? (Choose three.)

A) To start or shut down your local instance, initiate a SQL*Plus session connected as SYSDBA or SYSOPER, and then issue the required command.
B) Using SQL*Plus to start and stop the RAC database instances is the preferred method because SQL*Plus is a Clusterware client.
C) It is not possible to start up or shut down more than one instance at a time in SOL*Plus. so you cannot start or stop all the instances for a cluster database with a single SQL*Plus command.
D) You can start multiple instances from a single SQL*Plus session on one node using Oracle Net Services connection strings.

2. View the Exhibit.
Users complain about the performance of an Oracle database-based application. You are requested to investigate. From Grid Control, you immediately infer that one of the cluster database instances is currently unavailable. You also notice that the host where the instance belongs was recently rebooted due to an unknown reason.
Using Grid Control, you restart the instance and performance rapidly improves. You want to determine the cause of the instance startup failure after the system reboot, and you check the resource profiles on both the database and ASM instances involved.
Why was the instance not started by CRS?

A) The database instance's autostart attribute indicates that CRS should not restart it after system boot.
B) The instance was started by CRS after the system was rebooted, but someone stopped it from within SQL*Plus.
C) The instance was not started by CRS because its target state was set to "offline" before the system was rebooted.
D) The instance was started by CRS but due to multiple instance failures CRS disabled the database instance, thereby preventing further restarts.
E) The instance could not be started by CRS because this instance depends on an ASM instance, which has its autostart attribute set to a value, thereby preventing CRS from starting this ASM instance after a system reboot.

3. View the Exhibit.

A Symmetric RAC and Physical Standby Database configuration is set up for a high availability requirement matching the one in the exhibit with the primary using 'maximum availability' protection mode.
Which two benefits are there for each primary instance in sending its redo to a corresponding standby instance, rather than having all the primary instances sending redo to the same standby apply instance? (Choose two.)

A) Multiple standby instances allow the redo to be applied more quickly by the standby apply instance after the redo has already arrived from the primary.
B) The services on the primary would be symmetric allowing performance on each instance to be equal in the event of a switchover or failover to the standby database.
C) The workloads of the archive processes on the standby instances would be balanced, thereby allowing load balancing across the cluster where the standby resides.
D) Multiple standby instances allow the redo to be written to standby redo logs more quickly than just using a single receiving instance by reducing commit time on the primary instances.
E) If the redo receive load is spread across multiple receiving instances then the primary redo transport is less likely to become a bottleneck.

4. You have attended a user group presentation on RAC and based on what you have learned you feel that your company would benefit from having the RAC option to meet its Oracle database requirements in several ways. Your manager does not know much about RAC and asks you to create a presentation to the team explaining RAC, and whether it should be implemented in your installation. Which three statements explain the benefits and implications of RAC? (Choose three.)

A) RAC alone would increase availability when doing release upgrades.
B) RAC would increase availability in the event of a network failure.
C) RAC used in conjunction with parallel execution may provide speedup of DSS queries.
D) RAC would increase availability in the event of data failures.
E) RAC alone would not help protect from human errors.
F) RAC would increase scalability for all application workloads in all cases.
G) RAC would increase availability in the event of node and instance failures.
H) RAC used in conjunction with parallel execution may provide for speedup of OLTP workload processes.

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

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

質問と回答：

質問 # 1
正解： A、C、D

質問 # 2
正解： A

質問 # 3
正解： D、E

質問 # 4
正解： C、E、G

質問 # 5
正解： A、C、D