Select the best answer
for each question. After completing the quiz, check your answers using
the answer key in the appendix.
-
Which of the following
statements is true regarding the BUFNO= option?
-
The BUFNO= option specifies
the size of each buffer that is used for reading or writing a SAS
data set.
-
The BUFNO= option can
improve execution time by limiting the number of input/output operations
that are required.
-
Using the BUFNO= option
results in permanent changes to the data set.
-
Using the BUFNO= option
to increase the number of buffers results in decreased memory consumption.
-
Which of the following
statements is not true regarding a page?
-
A page is the unit of
data transfer between the storage device and memory.
-
A page includes the
number of bytes that are used by the descriptor portion, the data
values, and the overhead.
-
The size of a page is
analogous to buffer size.
-
The size of a page can
be changed at any time.
-
The total number of
bytes occupied by a data set equals which of the following?
-
the page size multiplied
by the number of pages.
-
the page size multiplied
by the number of observations.
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the sum of the page
size and the number of pages.
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the number of pages
multiplied by the number of variables.
-
Which statement opens
the file Work.Quarter1, allocates enough buffers to hold the entire
file in memory, and reads the data into memory?
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sasfile work.quarter1 open;
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sasfile work.quarter1 load;
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sasfile work.quarter1 bufno=max;
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sasfile work.quarter1 bufsize=max;
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Which of the following
statements is true regarding a file that is opened with the SASFILE
statement?
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The file is available
to subsequent DATA and PROC steps or applications until a SASFILE
CLOSE statement is executed or until the program ends.
-
The file is available
to subsequent DATA and PROC steps or applications until a SASFILE
END statement is executed.
-
The file is available
for subsequent utility or output processing until the program ends.
-
If the file increases
in size during processing, the number of buffers remains the same.