sas certificate base practice questions and detailed answer

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1、SASCertificateBasePracticeQuestionsandDetailedAnswersChapter1:BasicConceptsChapter2:ReferencingFilesandSettingOptionsChapter3:EditingandDebuggingSASProgramsChapter4:CreatingListReportsChapter5:CreatingSASDataSetsfromRawDataChapter6:UnderstandingDATAStepProcessingChapter7:Creatinga

2、ndApplyingUser-DefinedFormatsChapter8:CreatingEnhancedListandSummaryReportsChapter9:ProducingDescriptiveStatisticsChapter10:ProducingHTMLOutputChapter11:CreatingandManagingVariablesChapter12:ReadingSASDataSetsChapter13:CombiningSASDataSetsChapter14:TransformingDatawithSASFunctions

3、Chapter15:GeneratingDatawithDOLoopsChapter16:ProcessingVariableswithArraysChapter17:ReadingRawDatainFixedFieldsChapter18:ReadingFree-FormatDataChapter19:ReadingDateandTimeValuesChapter20:CreatingaSingleObservationfromMultipleRecordsChapter21:CreatingMultipleObservationsfromaSingle

4、RecordChapter22:ReadingHierarchicalFiles1Chapter1:BasicConceptsAnswerKey1.Howmanyobservationsandvariablesdoesthedatasetbelowcontain?a.3observations,4variablesb.3observations,3variablesc.4observations,3variablesd.can'ttellbecausesomevaluesaremissingCorrectcanswer:Rowsinthedatasetar

5、ecalledobservations,andcolumnsarecalledvariables.Missingvaluesdon'taffectthestructureofthedataset.2.Howmanyprogramstepsareexecutedwhentheprogrambelowisprocessed?datauser.tables;infilejobs;inputdatename$job$;run;procsortdata=user.tables;byname;run;procprintdata=user.tables;run;a.th

6、reeb.fourc.fived.sixCorrectaanswer:WhenitencountersaDATA,PROC,orRUNstatement,SASstopsreadingstatementsand2executesthepreviousstepintheprogram.TheprogramabovecontainsoneDATAstepandtwoPROCsteps,foratotalofthreeprogramsteps.3.WhattypeofvariableisthevariableAcctNuminthedatasetbelow?a.

7、numericb.characterc.canbeeithercharacterornumericd.can'ttellfromthedatashownCorrectbanswer:Itmustbeacharactervariable,becausethevaluescontainlettersandunderscores,whicharenotvalidcharactersfornumericvalues.4.WhattypeofvariableisthevariableWearinthedatasetbelow?a.numericb.character

8、c.canbeeithercharacterornumericd.