SASBase认证考试—70题SAS分多个认证种类：base，advanced，clinic等，但大多需要先通过base认证。但凡这类商业组织提供的考证，基本都是题库型，所以想考过难度并不大。对于只想拿SAS认证的人，如果熟练掌握网上流传甚广的sas真题70题，通过base认证基本就没问题。Q11.ThefollowingSASprogramissubmitted:dataWORK.TOTAL;setWORK.SALARY;byDepartmentGender;ifFirst.<_insert_code_>thenPayroll=0;Payroll+Wagerate;ifLast.<_insert_code_>;run;TheSASdatasetWORK.SALARYiscurrentlyorderedbyGenderwithinDepartment.WhichinsertedcodewillaccumulatesubtotalsforeachGenderwithinDepartment?A.GenderB.DepartmentC.GenderDepartmentD.DepartmentGender答案：A本题知识点：自动变量在SAS读取数据时，在PDV过程中会产生很多自动变量，在输出的数据集中是不可见的。·FIRST.VARIABLE：同一个BY变量（组），若新的变量值第一次出现时，其first.variable值为1。·LAST.VARIABLE：同一个BY变量（组），若新的变量值最后一次出现时，其last.variable值为1。另外，在BY变量右面有多个变量时，先按第一个变量排序，若第一个变量的观测存在重复时，才按第二个变量排序。Q2GiventhefollowingrawdatarecordsinTEXTFILE.TXT:1----|----10---|----20---|----30John,FEB,13,25,14,27,FinalJohn,MAR,26,17,29,11,23,CurrentTina,FEB,15,18,12,13,FinalTina,MAR,29,14,19,27,20,CurrentThefollowingoutputisdesired:ObsNameMonthStatusWeek1Week2Week3Week4Week51JohnFEBFinal$13$25$14$27.2JohnMARCurrent$26$17$29$11$233TinaFEBFinal$15$18$12$13.4TinaMARCurrent$29$14$19$27$20WhichSASprogramcorrectlyproducesthedesiredoutput?A.dataWORK.NUMBERS;lengthName$4Month$3Status$7;infile'TEXTFILE.TXT'dsd;inputName$Month$;ifMonth='FEB'theninputWeek1Week2Week3Week4Status$;elseifMonth='MAR'theninputWeek1Week2Week3Week4Week5Status$;formatWeek1-Week5dollar6.;run;procprintdata=WORK.NUMBERS;run;B.dataWORK.NUMBERS;lengthName$4Month$3Status$7;infile'TEXTFILE.TXT'dlm=','missover;inputName$Month$;ifMonth='FEB'theninputWeek1Week2Week3Week4Status$;elseifMonth='MAR'theninputWeek1Week2Week3Week4Week5Status$;formatWeek1-Week5dollar6.;2run;procprintdata=WORK.NUMBERS;run;C.dataWORK.NUMBERS;lengthName$4Month$3Status$7;infile'TEXTFILE.TXT'dlm=',';inputName$Month$@;ifMonth='FEB'theninputWeek1Week2Week3Week4Status$;elseifMonth='MAR'theninputWeek1Week2Week3Week4Week5Status$;formatWeek1-Week5dollar6.;run;procprintdata=WORK.NUMBERS;run;D.dataWORK.NUMBERS;lengthName$4Month$3Status$7;infile'TEXTFILE.TXT'dsd@;inputName$Month$;ifMonth='FEB'theninputWeek1Week2Week3Week4Status$;elseifMonth='MAR'theninputWeek1Week2Week3Week4Week5Status$;formatWeek1-Week5dollar6.;run;procprintdata=WORK.NUMBERS;run;答案：C本题知识点：INFILE语句与指示器@、@@INFILEfilespecificationoptions;其中，filespecification用来定义文件,options给出选择项;·filespecification有以下三种形式:3①、fileref(文件标志)②、’filename’(文件名)③、CARDS指明输入的数据，紧跟着CARDS语句·下列选择项(options)可以出现在INFILE语句中:①、COLUMN=variable或COL=variable定义一个变量,其值是指针所在的当前列位置。②、END=variable定义一个变量,作为文件结束的标志。③、EOF=label是一个语句标号,当INFILE语句读到文件末尾时,作为隐含的GOTO语句的目标。④、LENGHT=variable定义一个变量,其值是当前输入数据行的长度。⑤、FIRSTOBS=linenumber要求从指定的行开始读取数据,而不是从文件的第一个记录开始。⑥、OBS=n指定从一个顺序输入文件中读取数据的最后一个行(即第1～第n行)。一个观察可能占n行。⑦、DLM=若分隔符不是空格，则使用DLM=指定⑧、DSD忽略引号中数值的分隔符；自动将字符数据中的引号去掉；将两个相邻分隔符视为缺失值处理。⑨、MISSOVER...
