In SAS, datasets can be either temporary or permanent, depending on the library where they are stored. Temporary datasets are stored in the Work library and are deleted at the end of the session, while permanent datasets reside in user-defined libraries or in libraries that refer to a more persistent storage location. For this question: * B. Mylib.new: This is a permanent dataset. The prefix 'Mylib' suggests it is stored in a user-defined library (not the temporary 'Work' library), implying that the data persists beyond the current session unless explicitly deleted or if the library's link to the storage location is removed. * D. Temp.new: Despite the potentially misleading name 'Temp', if this dataset is not explicitly stored in the Work library, it could indeed be permanent. The permanence of a dataset is determined by its library reference, not by its name. If 'Temp' is a user-defined library linked to a persistent storage, then 'Temp.new' is also permanent. C: Work.new: This dataset is explicitly temporary as it is stored in the Work library, which is cleared at the end of the SAS session. A: New: Without additional context about the library, 'New' does not provide enough information to determine its permanence. It could be either temporary or permanent depending on the library it references. References:SAS documentation on libraries and dataset management, SAS Institute.
Question 2
Which step temporarily assign a format to the sales variable?
Correct Answer: B
Question 3
What is the default byte size of a numeric variable? Enter your numeric answer in the space above.
Correct Answer:
8 Explanation: The default length of numeric variables in SAS data sets is 8 bytes. In SAS, the default byte size of a numeric variable is 8 bytes. This allows for a significant amount of precision and a wide range of numeric values to be stored within a numeric variable, regardless of the actual number of digits in the number being stored. References: * SAS documentation on numeric variables, SAS Institute.
Question 4
What type of error does NOT produce the expected results and does NOT generate errors or warnings in the log?
Correct Answer: B
The type of error that does not produce expected results and does not generate errors or warnings in the log is a logic error. Logic errors occur when there is a flaw in the program's logic, which causes it to operate incorrectly, but the syntax is correct so it does not produce any error or warning messages. Unlike syntax errors which are mistakes in the program's code that prevent it from compiling or running, logic errors are more insidious because the program still runs but yields incorrect results. For example, a programmer may accidentally code an incorrect formula or use a wrong variable name that still exists, so the program runs but produces incorrect output. References: * SAS documentation on error types.
Question 5
Which LIBNAME statement has the correct syntax for accessing SAS data sets?
Correct Answer: B
The correct syntax for the LIBNAME statement in SAS, which assigns a libref to a library stored at a specific path, requires the libref to come first, followed by the path enclosed in quotes. The format is libname libref ' path';. Thus, the correct syntax among the options provided is Option B: libname mydata 'c:\sas\data';. This statement assigns the libref 'mydata' to the directory 'c:\sas\data'. The other options either invert the order of the libref and path or improperly use the equals sign, which is not standard syntax for the LIBNAME statement. References:SAS documentation on the LIBNAME statement, SAS Institute.
