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SAS Base认证考试—70题(31-40)
Q 31
Given the following raw data records in DATAFILE.TXT: ----|----10---|----20---|----30 Kim,Basketball,Golf,Tennis Bill,Football Tracy,Soccer,Track
The following program is submitted: data WORK.SPORTS_INFO;
length Fname Sport1-Sport3 $ 10; infile 'DATAFILE.TXT' dlm=','; input Fname Sport1 run;
proc print data=WORK.SPORTS_INFO; run;
Which output is correct based on the submitted program? A.
Obs Fname Sport1 Sport2 Sport3
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Sport2 Sport3 ;
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1 Kim Basketball Golf Tennis 2 Bill Football
3 Tracy Soccer Track B.
Obs Fname Sport1 Sport2 Sport3 1 Kim Basketball Golf Tennis 2 Bill Football Football Football 3 Tracy Soccer Track Track C.
Obs Fname Sport1 Sport2 Sport3 1 Kim Basketball Golf Tennis 2 Bill Football Tracy Soccer D.
Obs Fname Sport1 Sport2 Sport3 1 Kim Basketball Golf Tennis 2 Bill Football
答案：C
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本题知识点：INFILE语句选项MISSOVER
参考第5题。 Q 32
Consider the following data step: data WORK.NEW; set WORK.OLD; Count+1; run;
The variable Count is created using a sum statement. Which statement regarding this variable is true?
A. It is assigned a value 0 when the data step begins execution.
B. It is assigned a value of missing when the data step begins execution. C. It is assigned a value 0 at compile time. D. It is assigned a value of missing at compile time.
答案：C
本题知识点：累加语句
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variable + expression；
等价于
retain varibale 0； vaiable=variable+1;
变量必须是数值类型，初始值只能是0。 x+1;
x+(-1); /*每次执行减少1，不能写成x-1*/
x+(y=z); /*若y=z，返回1，则x累加1，否则不累加*/
在实际中，一般使用retain语句代替累加语句。retain语句的初始值可以是一个非零值。 Q 33
The following SAS program is submitted: data WORK.TEST; set WORK.PILOTS;
if Jobcode='Pilot2' then Description='Senior Pilot'; else Description='Unknown'; run;
The value for the variable Jobcode is: PILOT2.
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What is the value of the variable Description? A. PILOT2 B. Unknown C. Senior Pilot
D. ' ' (missing character value)
答案：B
本题知识点：SAS中的大小写
在SAS中，语句是不区分大小写的，但是字符型变量的数据值是区分大小写的。 Q 34
A user-defined format has been created using the FORMAT procedure. How is it stored? A. in a SAS catalog
B. in a memory resident lookup table C. in a SAS dataset in the WORK library
D. in a SAS dataset in a permanent SAS data library
答案：A
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SAS_Base认证考试—70题(31_40)
