感谢楼主分享!
有3道题我做的和答案不一样,望指教。
第30题 为什么选B,我认为是A,题如下:
30.You're attempting to read a raw data file and you see the following messages displayed in the SAS Log:
NOTE: Invalid data for Salary in line 4 15-23.
RULE: ----+----1----+----2----+----3----+----4----+----5--
4 120104 F 46#30 11MAY1954 33
Employee_Id=120104 employee_gender=F Salary=. birth_date=-2061 _ERROR_=1 _N_=4
NOTE: 20 records were read from the infile 'c:\employees.dat'.
The minimum record length was 33.
The maximum record length was 33.
NOTE: The data set WORK.EMPLOYEES has 20 observations and 4 variables.
What does it mean?
A. A compiler error, triggered by an invalid character for the variable Salary.
B. An execution error, triggered by an invalid character for the variable Salary.
C. The 1st of potentially many errors, this one occurring on the 4th observation.
D. An error on the INPUT statement specification for reading the variable Salary.
第32题我认为是A,您的答案是C,题如下:
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.
第42题我和您答案一样,选择A,但是上机运行得出的是D,不知道为什么,题如下:
42.The following SAS program is submitted:
data WORK.ONE;
Text='Australia, US, Denmark';
Pos=find(Text,'US','i',5);
run;
What value will SAS assign to Pos?
A. 0
B. 1
C. 2
D. 12
多谢执教,另外问一下,70题在考试中出现率大约为多少。


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