Sas interview questions and answers on macros

#Sas interview questions and answers on macros mod#
#Sas interview questions and answers on macros code#

How do the IN= variables improve the capability of a MERGE?Д®xplain the message 'MERGE HAS ONE OR MORE DATASETS WITH REPEATS OF BY VARIABLES'. Which data set is the controlling data set in the MERGE statement? When would you choose to MERGE two data sets together and when would you SET two data sets?

What is a problem with merging two data sets that have variables with the same name but different data? How would you combine 3 or more tables with different structures?

What happens in a one-on-one merge? When would you use one? Restrict the printing of the table.Д¬ode a PROC MEANS that shows both summed and averaged output of the data.Д¬ode the option that will allow MEANS to include missing numeric data to be included in the report.Д¬ode the MEANS to produce output to be used later.Дo you use PROC REPORT or PROC TABULATE? Which do you prefer? Explain. Name the option to produce a frequency line items rather that a table. What are some differences between PROC SUMMARY and PROC MEANS?Д¬ode the tables statement for a single-level (most common) frequency.Д¬ode the tables statement to produce a multi-level frequency. In PROC PRINT, can you print only variables that begin with the letter 'A'? How would you keep SAS from overlaying the a SAS set with its sorted version? What SAS PROCs have you used and consider yourself proficient in using? If you were given several SAS data sets you were unfamiliar with, how would you find out the variable names and formats of each dataset? Have you ever used 'Proc Merge'? (be prepared for surprising answers.) What is the difference between calculating the 'mean' using the mean function and PROC MEANS? In the following DATA step, what is needed for 'fraction' to print to the log? data _null_ x=1/3 if x=.3333 then put 'fraction' run How would you accomplish this in data step code? Using only PROC FORMAT. It needs to be displayed in the format 'ddmonyy' if it's before 1975, 'dd mon ccyy' if it's after 1985, and as 'Disco Years' if it's between 19. What is the difference between: x=a+b+c+d and x=SUM(a,b,c,d) ? How would you determine the number of missing or nonmissing values in computations? In ARRAY processing, what does the DIM function do?

#Sas interview questions and answers on macros mod#

How might you use MOD and INT on numerics to mimic SUBSTR on character strings? Which date function advances a date, time or date/time value by a given interval? What is the significance of the 'OF' in X=SUM(OF a1-a4, a6, a9) ? When looking for contained in a character string of 150 bytes, which function is the best to locate that data: scan, index, or indexc? What other SAS products have you used and consider yourself proficient in using? Name several ways to achieve efficiency in your program. Which is worse: not testing your programs or not commenting your programs? Have you ever had to follow SOPs or programming guidelines?

#Sas interview questions and answers on macros code#

What percent of your program code is usually original and what percent copied and modified? What is your favorite operating system? Why?Дo you observe any coding standards? What is your opinion of them? What is your favorite programming language and why? What has been your most common programming mistake?