QUESTION 47

Which one of the following statements is true regarding the name of a SAS array?

A. It is saved with the data set.

B. It can be used in procedures.

C. It exists only for the duration of the DATA step.

D. It can be the same as the name of a variable in the data set.

Answer: C

我承认我在书上没见过array用于proc step，但不明白为什么？

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QUESTION 112
The contents of the raw data file SIZE are listed below:
----|----10---|----20---|----30
72 95
The following SAS program is submitted:
data test;
in file 'size';
input@ 1 height 2.@ 4 weight 2;
run;
Which one of the following is the value of the variable WEIGHT in the output data
set?
A. 2
B. 72
C. 95
D. . (missing numeric value)

Answer: A
我用sas运行过结果的确是A，但不明白为什么？难道input可以assign  value给variable?

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多谢！！！