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You have two database servers SEMP and SACCT. The database in the SEMP server maintains the employeeinformation and the database in the SACCT server maintains the accounts payable information. The employeessubmit the expense reports to the accounts payabl

题目

You have two database servers SEMP and SACCT. The database in the SEMP server maintains the employeeinformation and the database in the SACCT server maintains the accounts payable information. The employeessubmit the expense reports to the accounts payable department. A user of the accounts payable databasewants to extract the employee information from the database in the SEMP server for cross-verification.  Whichschema object enables the user to access the information from the remote database（）

  • A、Cluster
  • B、Database link
  • C、Mapping table
  • D、Materialized view
参考答案和解析
正确答案:B
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相似问题和答案

第1题：

You are the administrator of three SQL Server 2000 computers at Five Lakes Publishing. One server, FLPSQL01, stores order data. You want to be able to use the other two servers, FLPSQL02 and FLPSQL03, to answer queries and run report. The planned network configuration is shown in the exhibit.

You want to use the database Maintenance Plan wizard to configure log shipping from FLPSQL01 to FLPSQL02 and FLPSQL03. You do not want users to add any new data on FLPSQL02 and FLPSQL03, but they must be able to run queries and reports.

Which two actions should you take? (Each correct answer presents part of the solution. Choose two)

A．Set the database load state for each destination server to No recovery mode.

B．Set the database load state for each destination server to standby mode.

C．Enable the allow database to assume primary role option for both destination servers.

D．Enable the allow database to assume primary role option for one destination server and then disable this option for other destination server.

E．Disable the allow database to assume primary role option for both destination servers.


正确答案：BE
解析：Explanation:B:Astandbyservercanbemaintainedtotaketheplaceoftheprimaryproductionserver,ifneeded.AstandbyserverisasecondarySQLServerinstallationthatiskeptup-to-datewithaprimarySQLServerinstallationthroughtheapplicationoftransactionlogbackupfiles.Youcanautomatetheprocessofmaintainingastandbyserverbycreatingbackup,copy,andrestorejobsthatareperiodicallyexecutedbySQLServerAgentontheprimaryserverandonthestandbyserver.Thisautomatedprocessiscalledlogshipping.Ifyouwantthedestinationdatabasetobeviewableforread-onlyqueries,youmustselecttheStandbyModeoption,thedefaultistheNoRecoveryModeoption.TheStandbymodespecifiesthatthesecondarydatabasebemadeavailableforuse,butinread-onlymode.E:Wedon'twantuserstoaddanydataonFLPSQL02orFLPSQL03.Thereforeweshoulddisabletheallowdatabasetoassumeprimaryroleoptionforthem.IfthisoptionwereenabledFLPSQL02andFLPSQL03wouldbeabletobeusedassourceservers.IncorrectAnswers:A:Thenorecoverymodespecifiesthatthesecondarydatabasebemadeunavailableforuse.WeneedstandbymodesincewewantFLPSQL02andFLPSQL03usedforqueriesandreports.Note:TheactiveportionofthetransactionlogontheprimaryservercanbebackedupusingtheNORECOVERYbackupoption.Thisoptionleavestheprimarydatabaseinrecoverymode.Whentheprimaryserverisreadytobebroughtbackonline,thetransactionlogsfromthestandbyserver(fortheperiodthatuserswereusingthestandbyserverastheprimaryserver)canbeappliedtotheprimaryserver.Thisavoidsthenecessityofapplyingacompletedatabasebackupandallapplicabletransactionlogstorestoretheprimaryserver.Theresultisasignificantdecreaseinthetimerequiredtobringtheprimaryserverbackonline.C:Theprimaryroleoptionmustbedisabledforbothdestinationservers.Ifnottheywouldbeabletochangeandupdatedata.D:Theprimaryroleoptionmustbedisabledforbothdestinationservers.Ifnottheywouldbeabletochangeandupdatedata.

第2题：

You are the administrator of a SQL Server 2000 computer. Your company purchased an accounting application from a vendor. The application stores its data in a database named Accounting on the server. The tables in this database contain columns that function as primary keys, but PRIMARY KEY and FOREIGN KEY constraints are not used.

You need to replicate data from this database to another SQL Server computer. This server will use the replicated data to generate reports. Most reports will run each month, but the accounting department needs to have the ability to run reports at any time. Reports should be accurate through the last full working day.

You cannot make any changes to the database, but you need to implement replication. Which two actions should you take? (Each correct answer presents part of the solution. Choose two)

A．Implement merge replication.

B．Implement snapshot replication.

C．Implement transactional replication.

D．Schedule replication to run continuously.

E．Schedule replication to run during off-peak hours.


正确答案：BE
解析：Explanation:
B: Snapshot replication is the best solution since we will not be making changes to the Accounting database but need to replicate data from the database to another SQL Server computer and as the accounting department needs to have the ability to run reports that only need to be accurate through the last full working day.

E: Only one snap-shot replication would be necessary per day, and to make as little impact on the daily use of the server this replication should be scheduled during off-peak hours.

Note: SQL Server 2000 provides three types of replication that can be used in distributed applications. These are snapshot replication, transactional replication and merge replication. Each type provides different capabilities.

Snapshot replication is the process of copying and distributing data and database objects exactly as they were at the time the snapshot was taken. Snapshot replication does not require continuous monitoring of changes because changes made to published data are not propagated to the Subscriber incrementally. Subscribers are updated with a complete data set and not individual transactions. As snapshot replication replicates an entire data set at one time, it may take longer to propagate data modifications to Subscribers. This type of replication in helpful in situations when data is mostly static and does not change often; it is acceptable to have copies of data that are out of date for a period of time; replicating small volumes of data; and when sites are often disconnected and high latency (the amount of time between when data is updated at one site and when it is updated at another) is acceptable.

In transactional replication, an initial snapshot of data is propagated to Subscribers, and then when data modifications are made at the Publisher, the individual transactions are captured and propagated to Subscribers. SQL Server 2000 monitors INSERT, UPDATE, and DELETE statements, and changes to stored procedure executions and indexed views. SQL Server 2000 stores the transactions affecting replicated objects and then it propagates those changes to Subscribers continuously or at scheduled intervals. Transaction boundaries are preserved. Transactional replication is used when data modifications must be propagated to Subscribers, often as they occur; transactions must be atomic; subscribers are mostly connected to the Publisher and when the application will not tolerate high latency for Subscribers receiving changes.

Merge replication allows various sites to work autonomously and merge data modifications made at multiple sites into a single, uniform. result at a later time. The initial snapshot is applied to Subscribers and then SQL Server 2000 tracks changes to published data at the Publisher and at the Subscribers. The data is synchronized between servers either at a scheduled time or on demand. Updates are made independently at more than one server, so the same data may have been updated by the Publisher or by more than one Subscriber. Therefore, conflicts can occur when data modifications are merged. This type of replication is helpful when multiple Subscribers need to update data at various times and propagate those changes to the Publisher and to other Subscribers; Subscribers need to receive data, make changes offline, and synchronize changes later with the Publisher and other Subscribers; the application latency requirement is either high or low, and when site autonomy is critical.

Incorrect Answers:
A: No data at the second server will not be changed so there is no need to use merge replication.

C: We don’t need the accuracy of transactional replication. In this scenario high latency is permissible as the reports must be accurate only through the last full working day.

Note: Transactional replication is used when data modifications must be propagated to Subscribers, often as they occur; transactions must be atomic; subscribers are mostly connected to the Publisher and when the application will not tolerate high latency for Subscribers receiving changes.

D: As the reports must be accurate through the last full working day, it not necessary to run replication continuously. Running replication continuously will place locks on the destination database, which would hamper the performance of queries and actions run against the destination database.

第3题：

You are the database administrator of a SQL Server 2000 computer. The server contains your company's Accounts database. Hundreds of users access the database each day.

Because you have had power interruptions in the past, you want to perfect the physical integrity of the Accounts database. You do not want to slow down server operations.

What should you do?

A．Enable the torn page detection database option for each database.

B．Disable write caching on all disk controllers.

C．Ensure that write caching disk controllers have battery backups.

D．Create a database maintenance plan to check database integrity and make repairs each night.


正确答案：C
解析：Explanation:Thescenariostatesthatpowerinterruptionshaveoccurredinthepast.Bybuyingabatterybackupsolutionforthediskcontrollersthepowerinterruptionproblemwouldbeprevented.IncorrectAnswers:A:Tornpagedetectionisareactivesolutionwhichwouldslowdownperformancesincerestoreswouldhavetobemade.Itwouldbettertouseapreventivesolution.Note:Tornpagedetection:Ifatornpageisdetected,thedatabasemustberestoredfrombackupbecauseitwillbephysicallyinconsistent.B:Cachingisveryimportforperformance.Disablingwrite-cachingwouldbeabadidea.D:Repairingthedatabaseeverynightisnotagoodsolution.Databaseerrorscannotbeaccepted.Itisbettertopreventtheprobleminsteadoftryingtofixitafterithashappened.

第4题：

You have two database servers SEMP and SACCT. The database in the SEMP server maintains theemployee information and the database in the SACCT server maintains the accounts payable  information.The employees submit the expense reports to the accounts payable department. A user of the accountspayable database wants to extract the employee information from the database in the SEMP server for cross-verification.  Which schema object enables the user to access the information from the remote database（）

  • A、Cluster
  • B、Database link
  • C、Mapping table
  • D、Materialized view

正确答案:B

第5题：

You work as a database administrator for Supportcenter.cn. You want to administer your database servers， which are running on different host machines， using the Web-enabled grid control interface. You have configured the agent on the host machines. You have started the Oracle Database 10g Grid Control utility on your machine. Which two additional components would you configure to achieve this objective？（）

  • A、Application Server Control
  • B、Oracle Management Service
  • C、Oracle Enterprise Manager Repository
  • D、Oracle Enterprise Manager Database Control

正确答案:C,D

第6题：

You are the administrator of two Microsoft Windows 2000 advanced server computers. On these servers, you are configuring a database that will store accounting information for your company.

The data must be available at all times. Interruptions in data connectivity should not last longer than five minutes. Any changes to the database should not require you to reconfigure the client computers.

How should you configure the database?

A．Configure the database on the two servers as a SQL Server 2000 cluster.

B．Configure the database on one server, and then configure a standby database on the second server.

C．Configure the database on each server. Use Microsoft Distributed Transaction Coordinator to keep the two servers perfectly synchronized.

D．Configure the database as a federated database, and then partition half the data on each server.


正确答案：A
解析：Explanation: SQL Server 2000 failover clustering provides high availability support by allowing us to configure one failover cluster to automatically, with no manual configuration, fail over to any other node in the failover cluster configuration. In this way, we minimize system downtime and provide high server availability during an operating system failure or a planned upgrade. Before SQL Server 2000 failover clustering can be set up, we must install Windows NT 4.0, Enterprise Edition, Windows 2000 Advanced Server or Windows 2000 Datacenter Server, and the Microsoft Cluster Service (MSCS).

In this scenario a cluster would be preferred to a standby server because it would be available immediately. A standby server on the other would require manual configuration and more time to become online.

Incorrect Answers:
B: A standby server would require you to reconfigure clients to allow it to connect to the standby server when the main server goes down. It would require at least several minutes of manual administration before the standby server would be operational. But the scenario requires that no reconfiguration of the client computers should be necessary. Therefore we should use a SQL Server 2000 cluster not a standby server.

Note: A standby server is a second server that contains a copy of the databases on the primary server and that can be brought online in the event of a primary server failure or due to scheduled maintenance on the primary server. This allows users to continue working with databases when the primary server becomes unavailable. When the primary server becomes available again, any changes to the standby server's copies of databases must be restored back to the primary server.

C: The Microsoft Distributed Transaction Coordinator coordinates distributed transactions, but would not increase availability.

Note: The Microsoft Distributed Transaction Coordinator (MS DTC) is a transaction manager that allows client applications to include several different sources of data in one transaction. MS DTC coordinates committing the distributed transaction across all the servers enlisted in the transaction.

An installation of SQL Server 2000 can participate in a distributed transaction by calling stored procedures on remote servers running SQL Server, automatically or explicitly promoting the local transaction to a distributed transaction and enlist remote servers in the transaction, and making distributed updates that update data on multiple OLE DB data sources. If these OLE DB data sources support the OLE DB distributed transaction interface, SQL Server 2000 can also enlist them in the distributed transaction. The MS DTC service coordinates the proper completion of the distributed transaction to ensure that either all of the updates on all the servers are made permanent, or, in the case of errors, all erased.

D: With Federated SQL Server 2000 servers, SQL Server 2000 databases can be spread across a group of autonomous database servers. These are capable of supporting the processing growth requirements of the largest Web sites and enterprise data-processing systems built with Microsoft Windows DNA, which divides the processing units of a data processing system into logical tiers. This however does not improve availability.

第7题：

A database administrator wants to design a multi-partition database that can take advantage of both intra-partition parallelism and inter-partition parallelism. Which configuration will allow the use of these types of parallelism while using the least number of hardware components (servers, processors)? （）

  • A、one server having at least two processors  
  • B、two servers having one processor and one logical database partition  
  • C、one server having four processors and two logical database partitions  
  • D、two servers each having four processors and two logical database partitions

正确答案:C

第8题：

You are the administrator of two SQL Server 2000 computers. One of these servers contains a 4-GB database named marketing. You want to remove the marketing database from one server and add it to the other as quickly as possible.

What should you do?

A．Detach the database from the original server by using the sp_detach_db stored procedure. Copy the database and the transaction log files to the new server, and attach them by using the sp_attach_db stored procedure.

B．Use the DTS export wizard to transfer all database objects from the original server to the new server. Drop the database from the original server.

C．Run a full backup of the database on the original server. Create a new database named marketing on the new server. Restore the backup in the new marketing database. Drop the database from the original server.

D．Shut down the original server. Copy the database and the transaction log files to the new server. Use the DISK INIT and DISK REFIT statements to attach the data file to the new server. Drop the database from the original server.


正确答案：A
解析：Explanation:Detachingandattachingdatabasesissometimesausefultechniqueforquicklymovingadatabasefromonecomputertoanother.Tomoveadatabase,ordatabasefile,toanotherserverordiskthedatabasemustfirstbedetachedfromtheoriginalserverordisk;movedtotheotherserverordiskandthenattachedontheserverordisk.Inadditionthenewlocationofthemovedfile(s)mustbespecified.Thesp_detach_dbstoredprocedureisusedtodetachthedatabaseandcanrunUPDATESTATISTICSonalltablesbeforedetachingthedatabasewhilethesp_attach_dbstoredprocedureisusedtoattachthedatabaseinitsnewlocation.IncorrectAnswers:B:DTScanimportdatafromatextfileorfromanOLEDBdatasourcesuchasaMicrosoftAccess2000databaseintoSQLServer.ItcanalsoexportdatafromSQLServertoanOLEDBdatadestination.Itprovidesforhigh-speeddataloadingfromtextfilesintoSQLServertables.However,itisnotthefastestwaytomoveawholedatabasefromoneservertoanother.C:Beforeadatabasecanberestoredfromabackuptoanewlocation;thedatabasemustfirstberecreatedinthedestinationasthebackupholdsonlythedatafilesthatbelonginthevarioustables.Itdoesnotholdthetabledefinitions.Thisisnotthefastestmethodtomoveadatabase.D:TheDISKINITandDISKREFITcommandscannotbeusedtomoveadatabasefromoneservertoanother.Note:DISKINITandDISKREINITarefeaturesthatareusedinaSQLServer6.x.inSQLServer6.x,DISKINITisusedtocreatedatabaseortransactionlogdevicestostorethespecifieddatabaseortransactionlogwhenDISKINITfollowedeitheraCREATEDATABASEorALTERDATABASEstatementwhileDISKREINITisusedtorestoredeviceentriestoappropriatesystemtableswhenthedeviceentrywasmissingfromsysdevices.InSQLServer2000theCREATEDATABASEandALTERDATABASEstatementsallowforthecreationofseparatedataandlogfiles.BothCREATEDATABASEandALTERDATABASEcreateoperatingsystemfilesanddatabasesinasinglestep.ItisthusrecommendedthatallreferencestoDISKINITshouldberemovedinSQLServer2000andreplacedwithreferencestoeitherCREATEDATABASEorALTERDATABASE.

第9题：

Your multitenant container database, CDB1, is running in ARCHIVELOG mode and has two pluggable databases, HR_PDB and ACCOUNTS_PDB. An RMAN backup exists for the database. You issue the command to open ACCOUNTS_PDB and find that the USERDATA.DBF data file for the default permanent tablespace USERDATA belonging to ACCOUNTS_PDB is corrupted. What should you do before executing the commands to restore and recover the data file in ACCOUNTS_PDB?（）

  • A、Place CDB1 in the mount stage and then the USERDATA tablespace offline in ACCOUNTS_PDb.
  • B、Place CDB1 in the mount stage and issue the ALTER PLUGGABLE DATABASE accounts_pdb CLOSE IMMEDIATE command.
  • C、Issue the ALTER PLUGGABLE DATABASE accounts_pdb RESTRICTED command.
  • D、Take the USERDATA tablespace offline in ACCOUNTS_PDb.

正确答案:D

第10题：

You work as a database administrator for Certkiller .com. You have been asked to use a centralized administrative tool to administer your database servers and application servers. In order to achieve the objective， which component would you configure on each database server？（）

  • A、Database Control
  • B、Management Server
  • C、Management Repository
  • D、Application Server Control
  • E、Oracle Management Agent

正确答案:E

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