QUESTION 72
The following SAS program is submitted:
data work.test;
First = 'Ipswich, England';
City = substr(First,1,7);
City_Country= City!!'; '!!'England';
run;
Which one of the following is the value of the variable CITY_COUNTRY in the output data set?

A. Ipswich!!
B. Ipswich, England

C. Ipswich, 'England'

D. Ipswich , England

Q:不明白为什么是D， 不明白题目中的感叹号的作用什么......

QUESTION 73
The following SAS program is submitted:
data work.test;
First = 'Ipswich, England';
City_Country= substr(First,1,7)!!', '!!'England';
run;
Which one of the following is the length of the variable CITY_COUNTRY in the output data set?

A. 6 B. 7 C. 17 D. 25

Answer: D

Q：这个完全不知道25是怎么算出来的

QUESTION 74
The following SAS program is submitted:
data work.test;
Title = 'A Tale of two Cities, Charles j.Dickens';
Word = scan(title,3,' ,');
run;
Which one of the following is the value of the variable WORD in the output data set?

A. T
B. of
C. Dickens
D. ' ' (missing character value)

Answer: B

Q:这道题里面scan(title,3,',')已经说了dml是逗号，怎么在scan title的时候直接锁定了of,我觉得是missing啊