p*5
发帖数: 311 | 1 Item 7 of 63 Mark item for review
A quick rule of thumb for the space required to run PROC SORT is:
A. two times the size of the SAS data set being sorted.
B. three times the size of the SAS data set being sorted.
C. four times the size of the SAS data set being sorted.
D. five times the size of the SAS data set being sorted.
是不是C呀？好像2，3，4都有人说。4倍说的最多。
Item 61 of 63 Mark item for review
In a data step merge, the BY variables in all data sets must have the same:
A. name.
B. name and type.
C. name and length.
D. name, type, and length.
是不是D？length不同有warning message，但是还是会运行 |
l*********s
发帖数: 5409 | 2 2 time is the correct answer
I think D is correct; otherwise you will have potentially precision issue. |
l**********9
发帖数: 148 | 3 第一题，有的材料说是3，有的材料说是4....标准答案是啥，是不是得把这软件反编译
一下才能知道....
第二题，length长度不一样的话，merge后会按较小的来，这样可能会造成显示错误... |
m****r
发帖数: 202 | 4 Item 7 of 63
A quick rule of thumb for the space required to run PROC SORT is:
Beginning with SAS 9, the workspace required for an uncompressed data file
is approximately twice the size of the data file. The workspace can be
allocated in memory and/or on disk as a utility file, depending on the sort
utility and on the options chosen.
A.
two times the size of the SAS data set being sorted.
|
p*5
发帖数: 311 | |
p*5
发帖数: 311 | 6 我仔细想了想，第二个还是选B好，因为必须name和type一致，但是length可以不一样
，不是必须的。 |
