Top 10 SAS Interview Questions You Must Prepare

SAS is the market’s most popular Data Analytics platform. This blog is the best guide for understanding all the concepts essential for a SAS data science certification interview to be transparent. Based on the complexity levels, we have separated the questions, and this will assist users of varying levels of experience in reaping the full value from our blog. A one-stop resource from which you can improve your interview training would be the SAS Interview Questions blog.

Let us understand why SAS is relevant before shifting to SAS interview questions. SAS is easy to understand and provides individuals who already know SQL with a comfortable alternative (PROC SQL). When it comes to managing large volumes of data and possibilities for parallel computations, SAS is on par with all leading instruments, including R & Python. Globally, SAS is the industry leader in corporate job openings. SAS holds over 70 percent of the market share for data analytics in India, compared to 15 percent for R. Now is the best time for you to begin with SAS Qualification Data Science Training if you intend to move your foot in Data Analytics. Now let us move on to some of the most critical questions about the SAS interview that can be posed in your SAS interview. 

How can SAS be defined? 

A software suite developed by the SAS Institute is SAS or Predictive Analytics Framework. Essentially, in business intelligence and integrated data processing and data mining, SAS is used. SAS also offers a user experience via the quintessential SAS language scheme for lay users.

What are the differences between the PROC MEANS and PROC SUMMARY? 

PROC MEANS only generates subgroup statistics when a BY declaration is used and the BY variables have previously sorted the input data (using PROC SORT). 

For all subgroups, PROC SUMMARY immediately creates statistics, giving you all the data in one run that you can get by continuously sorting a data set by the variables that describe and subgroup and running PROC Implies. In the output, the PROC SUMMARY does not yield any details. To construct a new DATA SET, you’ll need to use the OUTPUT statement and use PROC PRINT to see the computed statistics.

How is PROC SQL working? 

PROC SQL for all the observations is a simultaneous operation. When PROC SQL is executed, the following steps happen: 

  • SAS scans each statement and tests for syntax errors in the SQL method, such as missing semicolons and invalid sentences. 
  • The SQL optimizer within the declaration checks the query. To minimize run time, the SQL Optimizer decides how the SQL query should be performed. 
  • Any tables are loaded into the data engine in the FROM statement, where they can then be accessed in memory. 
  • It executes code and calculations. 
  • The Final Table is produced from memory. 
  • The output table defined in the SQL statement is sent to the Final Table.

If a variable only includes numbers, will it be a data type for characters? 

Sure, the attribute depends on how you use it. There are specific numbers that we would like to use rather than a quantity as a categorical value. A vector named “Foreigner” may be an example of this where the observations have the value “0” or “1,” indicating not a foreigner or a foreigner. Similarly, a particular table’s ID may be counted but does not represent any amount directly. Another typical example is phone numbers.

Can you show PROC SQL’s whole procedural function in SAS? 

Firstly, in every sentence, SAS tests for syntax errors. Secondly, the SQL optimizer decides on the SQL query execution. Thirdly, in the results, the tables established from the FROM statement are included. Then all the related codes and equations are performed, and the final table is generated consecutively. Finally, this table is relayed to the table for the output.

Can you clarify the APPEND statement’s purpose? Even by RUN-GROUP processing, what do you mean? 

The APPEND, essentially specified, is usually intended to combine one SAS data set with another SAS data set. On the other hand, RUN-GROUP, using the RUN statement, is mainly used to submit a PROC step. The main thing to bear in mind, though, is that the treatment should not be terminated.

Explain the role of BOR. What are the routines for CALL PRXCHANGE and CALL PRXFREE, too? 

As far as the BOR function is concerned, it is a bitwise logical relation primarily used between two respective statements to return logical OR. 

CALL PRXFREE The routine, on the other hand, is primarily used for free memory allocation purposes. The CALL PRXFREE Routine is used for character string matching. CALL PRXCHANGE is essentially used for pattern matching substitution, as the name implies.

Can you describe PDV’s purpose briefly? Also, what do you mean by a phase in data exactly? 

PDV, or Program Data Vector, is the memory area where, one at a time, the corresponding data sets are generated by the SAS. The input buffer allocates data values to their respective data variables upon the execution of the program concerned. On the other hand, a data stage is used primarily to generate SAS data sets by modifying the data.

Interleaving in SAS, can you define it? 

The critical goal of interleaving is to conglomerate multiple sorted data sets into a single data set. Interleaving, therefore, can be defined as the process by which a calculated degree of homogeneity is introduced into data sets; in short, it can be said that interleaving is a kind of data bundling or a mixture of data.

Can you find out trailing @ and @@’s essential uses? 

Often known as the column pointer, before reading additional data in the same record, the trailing @ is mainly used to peruse a line of your unchecked data. On the other side, the double trail releases the latest data line just after its depletion. In other words, before being double-trailed, the data line has to be read thoroughly.


I hope you will be helped by this series of SAS interview questions in preparation for your interview and becoming a data science expert.