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data work.quarterly_sales;

array qtr_sales[3];

do i=1 to 3;

    set sales_data(keep=jan feb mar);

    qtr_sales[i] = sales_data{i};

end;

avg_sales = mean(of qtr_sales[*]);

run;

The dataset `sales_data` has three variables named `jan`, `feb`, and `mar`, containing the sales for each month of the first quarter. Which statement is true regarding this code?

An analyst is using fedSQL to write a query that requires case-sensitive string comparison between two columns, 'user_name' from the 'user_accounts' table and 'login' from the 'login_attempts' table. Given that the database is case-insensitive by default, which of the following code snippets would correctly perform a case-sensitive comparison?

When using PROC MEANS to summarize data, a programmer needs to display only the variables "Time", "Distance", and "Speed" from a dataset, while also calculating the mean and standard deviation for those variables. Which of the following VAR statements is the most efficient way to achieve this while maintaining the original order in the dataset?

A SAS Viya data analyst is tasked with selecting a random subset of data from a dataset called 'CustomerData', which contains over 1 million records. The requirement is to analyze a manageable subset without any bias. How should the analyst use the 'subSet=' parameter in a procedure to ensure a random selection?

Which of the following is a true statement regarding variable scope in CASL?