Rows in the data set
are called observations, and columns are called variables. Missing
values do not affect the structure of the data set.
Correct answer: a
When it encounters a
DATA, PROC, or RUN statement, SAS stops reading statements and executes
the previous step in the program. This program contains one DATA
step and two PROC steps, for a total of three program steps.
Correct answer: b
It must be a character
variable, because the values contain letters and underscores, which
are not valid characters for numeric values.
Correct answer: a
It must be a numeric
variable, because the missing value is indicated by a period rather
than by a blank.
Correct answer: c
Variable names follow
the same rules as SAS data set names. They can be 1 to 32 characters
long, must begin with a letter (A-Z, either uppercase or lowercase)
or an underscore, and can continue with any combination of numbers,
letters, or underscores.
Correct answer: d
To store a file permanently
in a SAS data library, you assign it a libref other than the default
Work. For example, by assigning the libref Profits to a SAS data library,
you specify that files within the library are to be stored until you
delete them. Therefore, SAS files in the Sashelp, Sasuser, and Profits
libraries are permanent files.
Correct answer: d
To reference a temporary
SAS file in a DATA step or PROC step, you can specify the one-level
name of the file (for example, Forecast) or the two-level name using
the libref Work (for example, Work.Forecast).
Correct answer: d
The numeric variable
Balance has a default length of 8. Numeric values (no matter how many
digits they contain) are stored in 8 bytes of storage unless you specify
a different length.
Correct answer: c
The five statements
are 1) the PROC PRINT statement (two lines long); 2) the VAR statement;
3) the WHERE statement (on the same line as the VAR statement); 4)
the LABEL statement; and 5) the RUN statement (on the same line as
the LABEL statement).
Correct answer: d
Every SAS file is stored
in a SAS library, which is a collection of SAS files, such as SAS
data sets and catalogs. In some operating environments, a SAS library
is a physical collection of files. In others, the files are only logically
related. In the Windows and UNIX environments, a SAS library is typically
a group of SAS files in the same folder or directory.