Answer / Gaurav Bhardwaj

"1. Merge Procedure (MERGE): Used to combine two or more data sets by matching common variables.
2. BY Statement: Used within the procedure to sort and process the data set row by row based on a specific variable.
3. IF THEN ELSE Statement: Used to conditionally select rows from one data set based on values in another data set.
4. Macro: Used to create and execute SAS code dynamically based on conditions or user input.
5. Hash Objects: A powerful tool for table lookup that allows efficient processing of large datasets."

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