#CLINICAL SAS INTERVIEW QUESTIONS HOW TO#
#CLINICAL SAS INTERVIEW QUESTIONS CODE#

What system options would you use to help debug a macro?ДЄNS: The SAS System offers users a number of useful system options to help debug macro issues and problems.ДЄNS: If the macro variable is stored in the library then it is a easy to delete it. What are Automatic variables for macro?ДЎ9. What is the maximum length of the macro variable?ДЎ8. Macro parameters allow you to pass information into a macro.ДЎ7. How are parameters passed to a macro?ДЄNS: A macro variable defined in parentheses in a %MACRO statement is a macro parameter. If you use a SYMPUT in a DATA step, when and where can you use the macro variable?ДЄNS: Macro variable is used inside the Call Symput statement and is enclosed in quotes.ДЎ6. How would you identify a macro variable?ДЎ4. %Global is a macro variable defined in open code.ДЎ3. What is the difference between %LOCAL and %GLOBAL?ДЄNS: % Local is a macro variable defined inside a macro.

Tokens are passed on demand to the compiler.ДЎ2.

#CLINICAL SAS INTERVIEW QUESTIONS CODE#

What do you code to create a macro? End one?ДЄNS: We create a macro with %MACRO statement and end a macro with %MEND statement.ДЄNS: A component of SAS known as the word scanner breaks the program text into fundamental units called tokens. Every macroвЂ™s beginning is identified the keyword %macro and end with %mend.ДЎ0. Can we execute macro within another macro? If so, how would SAS know where the current macro ended and the new one began?ДЄNS: Yes, we can execute macro within a macro, we call it as nesting of macros, which is allowed. How we can call macros with in data step?ДЄNS: We can call the macro with CALL SYMPUT, Proc SQL, %LET statement and macro parameters.Д©. The auto call macro facility allows users to access the same macro code from multiple SAS programs.ДЄNS: Every time we invoke SAS, the macro processor automatically creates certain macro var.

#CLINICAL SAS INTERVIEW QUESTIONS HOW TO#

What is auto call macro and how to create a auto call macro?ДЄNS: SAS enables the user to call macros that have been stored as SAS programs. Phase 2: The experimental drug or treatment is given to a large group of people (100-300) to see that the drug is effective or not for that treatment. How we can call macros with in data step?ДЄNS: We can call the macro with CALLSYMPUTД¦. Clinical trials SAS Interview Questions & Answers.Describe the phases of clinical trials Phase 1: Test a new drug or treatment to a small group of people (20-80) to evaluate its safety. What is the maximum length of the macro variable?ДҐ. Macro language can be used to save more time and work for programming.ДЄNS: by adding the percent sign prefix to its name like % macro name a semicolon is not required when invoking a macro, though adding one generally does no harm.Д¤. We can develop Reuseble applications this applications we can use unlimited times. It is developed to avoid the calling of that function again and again.ДЄNS: SAS macros stores in auto call library. ANS: SAS Macro is a user defined function.

Clinical sas interview questions