下列关于债券投资与贷款的比较的说法中，正确的是（)。A．债券投资比贷款风险高B．债券投资比贷款流动

YouworkasadatabaseadministratorforSupportcenter.cn.Youwanttoadministeryourdatabaseservers，whicharerunningondifferenthostmachines，usingtheWeb-enabledgridcontrolinterface.Youhaveconfiguredtheagentonthehostmachines.YouhavestartedtheOracleDatabase10gGridControlutilityonyourmachine.Whichtwoadditionalcomponentswouldyouconfiguretoachievethisobjective？（）

A.ApplicationServerControl

B.OracleManagementService

C.OracleEnterpriseManagerRepository

D.OracleEnterpriseManagerDatabaseControl

A. It collects statistics into the pending area in the data dictionary

B. It creates a virtual hidden column in the CUSTOMERS_OBE table

C. It collects statistics with AUTO_SAMPLE_SIZE for ESTIMATE_PERCENT

D. It creates a histogram to hold skewed information about the data in the columns

A.Inactiveandcurrentredologfilesarerequiredtoaccomplishrecovery.

B.Onlineandarchivedredologfilesarerequiredtoaccomplishinstancerecovery.

C.Allredologentriesafterthelastcheckpointareappliedfromredologfilestodatafiles.

D.Allredologentriesrecordedinthecurrentredologfileuntilthecheckpointpositionareappliedtodatafiles

A. INSERT

B. UPDATE

C. SELECT

D. DESCRIBE

E. DELETE

F. RENAME

A.UPDATETABLE

B.CREATECLUSTER

C.TRUNCATETABLE

D.ALTERTABLEMOVE

E.INSERTINTO···VALUES

F.ALTERTABLE···DROPCOLUMN

G.ALTERTABLE···DROPPARTITION

A.TheDBMS_JOBpackage

B.TheBACKUP_JOBpackage

C.TheDBMS_BACKUP_RESTOREpackage

D.ThecalendartoolintheOperatingSystem（OS）

E.ThebackupschedulerinEnterpriseManager（EM）

F.TheDBMS_BACKUP_SCHEDULERpackagerinlinemode

A. 100KB default, 10TB maximum

B. 256KB default, 1024MB maximum

C. 10MB default, 126PB maximum

D. 64KB default, 1EB maximum

E. 1MB default, 64MB maximum

SSION_PCT NUMBER (6)You need to write a query that will produce these results:1. Display the salary multiplied by the commission_pct.2. Exclude employees with a zero commission_pct.3. Display a zero for employees with a null commission value. Evaluate the SQL statement:SELECT LAST_NAME, SALARY*COMMISSION_PCT FROM EMPLOYEESWHERE COMMISSION_PCT IS NOT NULL;What does the statement provide? （）

A. All of the desired results

B. Two of the desired results

C. One of the desired results

D. An error statement

A. Failed disks are taken offline immediately but are not dropped.

B. Disk data is never lost.

C. By default, the failed disk is not dropped from the disk group ever, protecting you from loss of that disk.

D. The failed disk is automatically reformatted and then resynchronized to speed up the recovery process.

E. Hot spare disks are automatically configured and added to the disk group.

A.run{openscriptbackup_database；runscriptbackup_database}

B.run{engagescriptbackup_database；}

C.run{runscriptbackup_database；}

D.Run{executescriptbackup_database；}

E.Thenamebackup_databaseisaninvalidnameforanRMANscript.TryingtorunitfromRMAN wouldresultinanerror.