供应商与采购商采用签订合同、供货、收款的交易方式是（)。A．两端商流，中间物流B．两端物流，中间商流C

A.Donothing.

B.Restartthedatabase.

C.Performrecoveryonthedatabase.

D.Restorethealertlogfromthelastbackup.

A. VARCHAR2

B. CHAR

C. NVARCHAR2

D. CLOB

E. LONG

A.TheSQLtracefacilitywillgeneratetheperformancestatisticsforalltheSQLstatementsforaninstanceandwritethemintheUSER_DUMP_DESTdirectory.

B.TheSQLtracefacilitywillgeneratetheperformancestatisticsforalltheSQLstatementsforasessionandwritethemintheUSER_DUMP_DESTdirectory.

C.TheSQLtracefacilitywillgeneratetheperformancestatisticsforalltheSQLstatementsforaninstanceandwritethemintheBACKGROUND_DUMP_DESTdirectory.

D.TheSQLtracefacilitywillgeneratetheperformancestatisticsforalltheSQLstatementsforasessionandwritethemintheBACKGROUND_DUMP_DESTdirectory.

omanagement.UNDO_RETENTIONissetto3hours.Youwanttoflashbackatablethatwascreatedlastyear.Howfarbackcantheflashbackquerygo？（）

A.3hours

B.6months

C.untillastyear

D.untillastcommit

E.untilthepointwhentheundotablespacewasrefreshed

F.untilthedatabaseisshutdownandthememoryerased

A.Thetracefileswillbedisabledonlyforaspecificsession.

B.Tracingwillbedisabledforaclientidentifier.

C.TracingwillbedisabledonlyfortheARCnprocess.

D.TheSQLTracefacilitywillbedisabledfortheinstance.

A.OracleSIDsonly

B.Oraclehomesonly

C.Oracleinstalltimestamp

D.Oracleinventorypointerfiles

E.Oracledatabasecreationtimestamp

F.OracleSIDsandOraclehomesonly

G.OracleSIDs，Oraclehomesandflagforautostartup

A.The Thread.sleep() method can take t1 as an argument.

B.The Object.notify() method can take t1 as an argument.

C.The Thread.yield() method can take t1 as an argument.

D.The Thread.setPriority() method can take t1 as an argument.

E.The Object.notify() method arbitrarily chooses which thread to notify.

A.2，5，1，4，3

B.1，2，3，4，5

C.5，2，1，3，4

D.2，1，5，4，3

EPARTMENTS tables:EMPLOYEE_ID, EMPLOYEE_NAME AND DEPARTMENT_NAME.The DEPARTMENT_ID column of the EMPLOYEES table is the foreign key to the primary keyDEPARTMENT_ID column of the DEPARTMENTS table.You want to modify the view by adding a fourth column, MANAGER_ID of NUMBER data type from the EMPLOYEES tables.How can you accomplish this task? （）

A. ALTER VIEW EMP_dept_vu (ADD manger_id NUMBER);

B. MODIFY VIEW EMP_dept_vu (ADD manger_id NUMBER);

C. ALTER VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employee e, departments d WHERE e.department _ id = d.department_id;

D. MODIFY VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employees e, departments d WHERE e.department _ id = d.department_id;

E. CREATE OR REPLACE VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employees e, departments d WHERE e.department _ id = d.department_id;

F. You must remove the existing view first, and then run the CREATE VIEW command with a new column list to modify a view.

A.TheOraclekernelwillbeplacedinthislocation.

B.TheOraclesoftwarewillbeplacedinthislocation.

C.Theserverparameterfile（SPFILE）willbeplacedinthislocation.

D.Thedatabasefileswillbeplacedinthislocation，ifnotspecifiedexplicitly.

E.ThelocationwillbeconsideredforthebaseofOracleManagedFiles（OMF）.

F.ThelocationwillbeconsideredforthebaseofOptimalFlexibleArchitecture（OFA）.