SAS Chapter 1 Basic Concepts

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  • 1/10 Questions
    What type of variable is the variable Wear in the data set below, assuming that there is a missing value in the data set? - ProProfs

    What type of variable is the variable Wear in the data set below, assuming that there is a missing value in the data set?

    • Numeric
    • Character
    • Can be either character or numeric
    • Can't tell from the data shown
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SAS Chapter 1 Basic Concepts - Quiz
About This Quiz

This quiz assesses fundamental SAS concepts, focusing on data handling, program processing, and variable types. It tests understanding of observation and variable counts, program step execution, and variable classification, essential for learners pursuing SAS proficiency.

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  • 2. 
    What type of variable is the variable AcctNum in the data set below? - ProProfs

    What type of variable is the variable AcctNum in the data set below?

    • Numeric

    • Character

    • Can be either character or numeric

    • Can't tell from the data shown

    Correct Answer
    A. Character
    Explanation
    It must be a character variable, because the values contain letters and underscores, which are not valid characters for numeric values.

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  • 3. 

    Which of the following files is a permanent SAS file?

    • Sashelp.PrdSale

    • Sasuser.MySales

    • Profits.Quarter1

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    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 and Sasuser libraries are permanent files.

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  • 4. 

    What is a SAS library?

    • Collection of SAS files, such as SAS data sets and catalogs

    • In some operating environments, a physical collection of SAS files

    • In some operating environments, a logically related collection of SAS fils

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    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.

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  • 5. 

    Which of the following variable names is valid?

    • 4BirthDate

    • $Cost

    • _Items_

    • Tax-Rate

    Correct Answer
    A. _Items_
    Explanation
    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.

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  • 6. 
    What is the default length for the numeric variable Balance? - ProProfs

    What is the default length for the numeric variable Balance?

    • 5

    • 6

    • 7

    • 8

    Correct Answer
    A. 8
    Explanation
    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.

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  • 7. 
    How many observations and variables does the data set below contain? - ProProfs

    How many observations and variables does the data set below contain?

    • 3 observations, 4 variables

    • 3 observations, 3 variables

    • 4 observations, 2 variables

    • Can't tell because some values are missing

    Correct Answer
    A. 4 observations, 2 variables
    Explanation
    The data set displayed in the image contains:
    4 observations: Adams, Geller, Martinez, Noble
    2 variables: Name and Balance
    Thus, the correct choice based on standard interpretations is missing from the provided options. Each row represents an observation (an individual account with a balance), and each column represents a variable (one for names, and one for balances). There are 4 observations (the individuals named Adams, Geller, Martinez, and Noble) and 2 variables (Name and Balance). If you need the response to match one of your provided choices, please verify the options or provide additional context.

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  • 8. 

    In a DATA step, how can you reference a temporary SAS data set named Forecast?

    • Forecast

    • Work.Forecast

    • Sales.Forecast

    • Only a and b above

    Correct Answer
    A. Only a and b above
    Explanation
    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).

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  • 9. 

    How many steps are executed when the program below is processed? data user.tables;      infile jobs;      input date name $ job $; run; proc sort data=user.tables;      by name; run; proc print data=user.tables; run;

    • Three

    • Four

    • Five

    • Six

    Correct Answer
    A. Three
    Explanation
    When it encounters a DATA, PROC, or RUN statement, SAS stops reading statements and executes the previous step in the program. The program above contains one DATA step and two PROC steps, for a total of three program steps.

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  • 10. 

    How many statements does the following SAS program contain? proc print data=new.prodsale           label double;      var state day price1 price2; where state='NC';      label state='Name of State'; run;

    • Three

    • Four

    • Five

    • Six

    Correct Answer
    A. Five
    Explanation
    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).

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  • Current Version
  • Jun 17, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 09, 2013
    Quiz Created by
    Moxleyv

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