java月考试题（java monthly test questions）

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1、java月考试题（Javamonthlytestquestions）In1.,thefollowingoptioncanbeusedtodeletecolumnupdate_dtfromtablestate.A.ALTERTABLEstateDROPCOLUMNupdate_dt;B.ALTERTABLEstateDELETECOLUMNupdate_dt;C.DROPCOLUMNupdate_dtFROMstate;D.REMOVECOLUMNupdate_dtFROMstate;Thecorrectanswer:ATheCo

2、nnectioninterfaceof2.JDBCdoesnotcontainthemethodof().A.createStatement()B.prepareStatement(StringSQL)C.createPrepareStatement(StringSQL)D.commit()Thecorrectanswer:C3.belowdoesnotbelongtotheformproperty.A.actionB.methodC.enctypeSpecifyhowtoencodetheformdatabeforesendi

3、ngittotheserverenctype="D.sizeThecorrectanswer:D4.DTDdefinesthebookelementasfollows:<<<ThefollowingXMLfragmentsconformingtotheDTDdefin

4、itionare:().A.B.WhatisJavaGoodManC.GoodManOneGoodManTwoWhatisJavaD.WhatisJavaThecorrectanswer:B5.ResultSetprovidesawaytoob

5、tainthevalueofafieldinadatabase.IfafieldisNUMBERtype,thevalueofthefieldcanbeobtained:().A.getNumber()B.getDouble()C.setNumber()D.setDouble()Thecorrectanswer:B6.thefollowingstatementsbelongtotheDMLstatement:().A.COMMIT---TCLobjectcontrolB.INSERTC.DROP---DDLdatadefinit

6、ionlanguagePermissioncontrolofD.GRANT---DCLThecorrectanswer:BInsert/update/deleteSelectDQLdataquerylanguage7.inXMLdocuments,phone_numberelementscontainhomeormobilesubelements,andthefollowingcorrectDTDdefinitionsare:().A.B.

7、hone_number(home?Mobile)>C.>!D.

8、mobile)>Thecorrectanswer:D8.belowisthecodeforXMLinafile.ThefollowingoptionsconformtotheXMLsyntaxrulesare()A.HellowelcomeB.welcome<

9、/a>C.HelloD.HappyThecorrectanswer:B9.theentityreferencethatbelongstoXMLis()A.""B.&C.>D.