When is the connection concentrator enabled?（）

单项选择题Whichaction(s)willcauseacompressiondictionarytoberemovedfromatable?（）

A.Set the table COMPRESS attribute to NO.  
B.Set the table COMPRESS attribute to NO; run REORG against the table.  
C.Set the table COMPRESS attribute to NO; run INSPECTRESETDICTIONARY against the table.  
D.Set the table COMPRESS attribute to NO; run RUNSTATS against the table.

单项选择题TableTAB1wascreatedusingthefollowingstatement:CREATETABLEtab1(c1INT,c2INT,c3INT,c4INT,c5INT);IfcolumnC1isuniqueandqueriestypicallyaccesscolumnsC1,C2andC3together,whichstatement(s)willcreateindex(es)thatwillprovideoptimalqueryperformance?（）

A.CREATE UNIQUE INDEX xtab1 ON tab1 (c1); CREATE INDEX xtab2 ON tab1 (c2) INCLUDE (c3)  
B.CREATE UNIQUE INDEX xtab1 ON tab1 (c1) INCLUDE (c2, c3) 
C.CREATE UNIQUE INDEX xtab1 ON tab1 (c3, c2, c1)  
D.CREATE UNIQUE INDEX xtab1 ON tab1 (c2) INCLUDE (c1, c3)

单项选择题Abatchapplicationexecutesalargenumberofupdatestatements.Theservicelevelagreementfortheapplicationstatesthattheapplicationmustcompleteitsworkasquicklyaspossibletoensurethatdependentworkloadscanstartontime.Whatisonewaytohelptheapplicationcompletequickly?（）

A.Code the application to issue a LOCK TABLE statement.  
B.Code the application to issue a LOCK ROW statement.  
C.Decrease the number of I/O servers.  
D.Increase the locklist parameter. 

单项选择题IfthesortheapthresholdparameterSHEAPTHRES_SHRissettoavalueof0,whatwillhappen?（）

A.All sorts will be done in a temporary table space.  
B.The shared sort memory allocation will be calculated by DB2
C.No shared memory is allocated for sorting.  
D.All sorts will be done in shared memory.

多项选择题GivenaSHEAPTHRESvalueof2560,inwhichtwocaseswillaSHEAPTHRES_SHRvalueof1024bemeaningful?（）

A.INTRA_PARALLEL NO  
B.MAX_CONNECTIONS 2000, MAX_COORDAGENTS 100  
C.MAX_AGENTS 100, MAX_CONNECTIONS 2000 
D.MAX_CONNECTIONS 500, MAX_COORDAGENTS 1000  
E.INTRA_PARALLEL YES