db2考试自测题1带答案选项.docx

db2考试自测题1带答案选项.docx

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db2考试自测题1带答案选项

1）WhichofthefollowingproductsisrequiredtobeinstalledinordertobuildanapplicationonAIX,whichwillaccessaDB2UDBforOS/390database?

a）DB2ConnectPersonalEdition

b）DB2UniversalDatabaseWorkgroupEdition

c）DB2PersonalDeveloper'sEdition

d）DB2UniversalDeveloper'sEdition

2）Whichofthefollowingtoolscanbeusedtocatalogadatabase?

a）Journal

b）AlertCenter

c）LicenseCenter

d）ClientConfigurationAssistant

3）Whichofthefollowingutilitieswouldyouruntoorderdataandreclaimspacefromdeletedrowsinatable:

a）reorg

b）db2look

c）db2move

d）runstats

4）ThepurposeoftheUSEprivilegeisto:

a）querydatainatable.

b）loaddataintoatable.

c）createtableswithinatablespace.

d）createtablespaceswithinadatabase.

5）Whichtwoofthefollowingauthoritiescancreateadatabase?

a）DBADM

b）SYSADM

c）DBCTRL

d）SYSCTRL

e）SYSMAINT

6）Catalogingaremotedatabaseis:

a）PerformedonaPCorUNIXmachinetoidentifytheservertheDB2databasemanagerison.

b）PerformedonaPCorUNIXmachinetoidentifytheDB2databasetousersandapplications.

c）NeverperformedinDB2,asonlyonedatabasepernodeisallowed,socataloginganodeautomaticallycatalogsthedatabaseatthatnode.

d）PerformedonaPCorUNIXmachinetoopenthecatalogsintheDB2databaseandpresentauserwithalistofallaccessibletablesinthatdatabase.

7）Giventhecreatestatements:

CREATEDISTINCTTYPEkphASINTEGERWITHCOMPARISONS

CREATEDISTINCTTYPEmphASINTEGERWITHCOMPARISONS

CREATETABLEspeed_limits

（route_numSMALLINT,

canada_slKPHNOTNULL,

us_slMPHNOTNULL）

Whichofthefollowingisavalidquery?

a）SELECTroute_numFROMspeed_limitsWHEREcanada_sl>80

b）SELECTroute_numFROMspeed_limitsWHEREcanada_sl>kph

c）SELECTroute_numFROMspeed_limitsWHEREcanada_sl>us_sl

d）SELECTroute_numFROMspeed_limitsWHEREcanada_sl>kph（80）

8）If,foragiventable,theControlCenterdoesnotshowthechoiceGenerateDDL,whichofthefollowingdescribesthereason?

a）Thetableisasystemobject.

b）Thetableisasummarytable.

c）ThetableisinLOADPENDING.

d）Thetableisareplicatedtable.

e）Thetablewascreatedbyadifferentuser.

9）Giventhetables:

COUNTRY

IDNAMEPERSONCITIES

1Argentina110

2Canada220

3Cuba210

4Germany10

5France75

STAFF

IDLASTNAME

1Jones

2Smith

WhichofthefollowingstatementsremovestherowsfromtheCOUNTRYtable

thathavePERSONSintheSTAFFtable?

a）DELETEFROMcountryWHEREidIN（SELECTidFROMstaff）

b）DELETEFROMcountryWHEREidIN（SELECTpersonFROMstaff）

c）DELETEFROMcountryWHEREpersonIN（SELECTidFROMstaff）

d）DELETEFROMcountryWHEREpersonIN（SELECTpersonFROMstaff）

10）ThetableSTOCKhasthefollowingcolumndefinitions:

typeCHAR

（1）

statusCHAR

（1）

quantityINTEGER

priceDEC（7,2）

ItemsareindicatedtobeoutofstockbysettingSTATUStoNULLandQUANTITYandPRICEtozero.WhichofthefollowingstatementsupdatestheSTOCKtabletoindicatethatalltheitemsexceptforthosewithTYPEof"S"aretemporarilyoutofstock?

a）UPDATEstockSETstatus='NULL',quantity=0,price=0WHEREtype<>'S'

b）UPDATEstockSET（status,quantity,price）=（NULL,0,0）WHEREtype<>'S'

c）UPDATEstockSET（status,quantity,price）=（'NULL',0,0）WHEREtype<>'S'

d）UPDATEstockSETstatus=NULL,SETquantity=0,SETprice=0WHEREtype<>'S'

11）WhichofthefollowingproductscanbeusedtostoreimagedatainaDB2database?

a）Net.Data

b）NetSearch

c）DB2AVIExtenders

d）DB2XMLExtenders

e）DB2TextExtenders

12）WhichofthefollowingCANNOThaveanautocommitsetting?

a）EmbeddedSQL

b）TheCommandCenter

c）TheCommandLineProcessor

d）TheDB2CallLevelInterface

13）Whichofthefollowingstatementseliminatesallbutoneofeachsetofduplicaterowsinthefinalresulttable?

a）SELECTUNIQUE*FROMt1

b）SELECTDISTINCT*FROMt1

c）SELECT*FROMDISTINCTT1

d）SELECTUNIQUE（*）FROMt1

e）SELECTDISTINCT（*）FROMt1

14）Giventhetable:

STAFF

IDLASTNAME

1Jones

2Smith

3

WhichofthefollowingstatementsremovesallrowsfromthetablewherethereisaNULLvalueforLASTNAME?

a）DELETEFROMstaffWHERElastnameISNULL

b）DELETEALLFROMstaffWHERElastnameISNULL

c）DELETEFROMstaffWHERElastname='NULL'

d）DELETEALLFROMstaffWHERElastname='NULL'

15）Giventhefollowingtabledefinitions:

DEPARTMENT

deptnoCHAR（3）

deptnameCHAR（30）

mgrnoINTEGER

admrdeptCHAR（3）

EMPLOYEE

empnoINTEGER

firstnameCHAR（30）

midinitCHAR

lastnameCHAR（30）

workdeptCHAR（3）

Whichofthefollowingstatementswilllisteveryemployee'snumberandlastnamewith

theemployeenumberandlastnameoftheirmanager,includingemployeeswithouta

manager?

a）SELECTe.empno,e.lastname,m.empno,m.lastnameFROMemployeeeLEFTINNER

JOINdepartmentINNERJOINemployeemONmgrno=m.empnoONe.workdept=deptno

b）SELECTe.empno,e.lastname,m.empno,m.lastname,FROMemployeeeLEFTOUTERJOIN

departmentINNERJOINemployeemONmgrno=m.empnoONe.workdept=deptno

c）SELECTe.empno,e.lastname,m.empno,m.lastnameFROMemployeeeRIGHTOUTERJOIN

departmentINNERJOINemployeemONmgrno=m.empnoONe.workdept=deptno

d）SELECTe.empno,e.lastname,m.empno,m.lastnameFROMemployeeeRIGHTINNERJOIN

departmentINNERJOINemployeemONmgrno=m.empnoONe.workdept=deptno

16）Giventhefollowingtables:

NAMES

NameNumber

WayneGretzky99

JaromirJagr68

BobbyOrr4

BobbyHull23

BrettHull16

MarioLemieux66

SteveYzerman19

ClaudeLemieux19

MarkMessier11

MatsSundin13

POINTS

NamePoints

WayneGretzky244

JaromirJagr168

BobbyOrr129

BobbyHull93

BrettHull121

MarioLemieux189

PIM

NamePIM

MatsSundin14

BobbyOrr12

MarkMessier32

BrettHull66

MarioLemieux23

JoeSakic94

Whichofthefollowingstatementswilldisplaytheplayer'sNames,numbers,pointsandPIMforallplayerswithanentryinallthreetables?

a）SELECTnames.name,names.number,points.points,pim.pimFROMnamesINNERJOINpoints

ONnames.name=points.nameINNERJOINpimONpim.name=names.name

b）SELECTnames.name,names.number,points.points,pim.pimFROMnamesOUTERJOINpoints

ONnames.name=points.nameOUTERJOINpimONpim.name=names.name

c）SELECTnames.name,names.number,points.points,pim.pimFROMnamesLEFTOUTERJOIN

pointsONnames.name=points.nameLEFTOUTERJOINpimONpim.name=names.name

d）SELECTnames.name,names.number,points.points,pim.pimFROMnamesRIGHTOUTERJOIN

pointsONnames.name=points.nameRIGHTOUTERJOINpimONpim.name=names.name

17）Giventhetables:

EMPLOYEE

emp_numemp_namedept

1Adams1

2Jones1

3Smith2

4Williams1

DEPT

dept_iddept_name

1Planning

1Support

andthestatement:

ALTERTABLEemployee

ADDFOREIGNKEY（dept）REFERENCES（dept_id）

ONDELETECASCADE

Howmanyunitsofworkwillbeneededtoprocessthisstatement:

DELETEFROMdeptWHEREdept_id=1

a）0

b）1

c）2

d）3

e）4

f）6

18.Giventherequirementstostorenames,employeenumbers,andwhentheemployeeswerehired,whichofthefollowingDB2datatypesCANNOTbeusedtocontainthedaytheemployeewashired?

a）CLOB

b）TIME

c）VARCHAR

d）TIMESTAMP

19）Giventhetransaction:

"CREATETABLEt1（idINTEGER,CONSTRAINTchkidCHECK（id<100））"

"INSERTINTOt1VALUES（100）"

"COMMIT"

Whichofthefollowingresultsfromthetransaction?

a）TherowisinsertedwithaNULLvalue

b）Therowisinsertedwithavalueof100

c）Therowinsertionwithavalueof100isrejected

d）Thetriggercalledchkidisfiredtovalidatethedata

20）Ifatableisdefinedwithacheckconstraintforoneormorecolumns,whichofthefollowingwillperformthedatavalidationafterthetableisloadedwiththeloadutility.

a）Reorg

b）Check

c）Runstats

d）ImageCopy

e）SetIntegrity

21）Giventhestatement:

CREATEVIEWv1ASSELECTc1FROMt1WHEREc1='a'WITHCHECKOPTION

WhichofthefollowingSQLstatementswillinsertdataintothetable?

a）INSERTINTOv1VALUES（a）

b）INSERTINTOv1VALUES（b）

c）INSERTINTOv1VALUES（'b'）

d）INSERTINTOv1VALUES（'a'）

e）INSERTINTOv1VALUES（'ab'）

22）Anupdatelockgetsreleasedbyanapplicationusingtherepeatablereadisolationlevelduringwhichofthefollowing?

a）Ifthecursoraccessingtherowisclosed.

b）IfthetransactionissuesaROLLBACKstatement.

c）Ifthecursoraccessingtherowismovedtothenextrow.

d）IfthetransactionchangesaremadeviaanUPDATEstatement.

23）Whichofthefollowingisolationlevelsismostlikelytoacquireatablelevellockduringanindexscan?

a）ReadStability

b）RepeatableRead

c）CursorStability

d）UncommittedRead

24）Whichofthefollowingreleasesalockbyanapplicationusingthecursorstabilityisolationlevel?

a）Ifthecursoraccessingtherowismovedtothenextrow

b）Ifthecursoraccessingtherowisusedtoupdatetherow

c）Iftheapplication'scurrentrowisdeletedbytheapplication

d）Iftheapplication'scurrentrowneedstobeupdatedbyanotherapplic

ation

25）WhichofthefollowingprocessesisNOTperformedbyDB2WarehouseManager?

a）Query

b）Loading

c）Extraction

d）Transformation

26）WhichofthefollowingDB2componentsallowsreferencetoOracleandDB2databasesinasinglequery?

a）DB2QueryPatroller

b）DB2WarehouseManager

c）DB2RelationalConnect

d）DB2ConnectEnterpriseEdition

27）Giventhetable:

STAFF

IDLASTNAME

1Jones

2Smith

WhenissuingthequerySE