Which set has a group of fields that provides an ordered arrangement of data aligned vertically under a horizontal array of column headers?

• A. Free Text Set
• B. Columnar Set
• C. Linear Set
• D. Airspace Control Order

Answer: (B)

Think of a table where each column has a header and every row represents a single record. The values sit directly under their column headers, creating an orderly, column-based arrangement. This is exactly what a columnar set provides: a structured group of fields aligned vertically under a horizontal row of headers, making the data easy to scan, compare, and sort. Free text sets lack fixed columns and headers, so their data aren’t organized into vertical columns. A linear set is just a single sequence rather than a multi-column table, and an Airspace Control Order is a specific military document, not a data structure.