What is the data structure that stores values in a grid of rows and columns called?

• A. Two-dimensional arrays
• B. Linked lists
• C. Binary trees
• D. Stacks

Answer: (A)

A grid of rows and columns is stored as a two-dimensional array. This structure is like an array whose elements are themselves arrays, so you can reach any cell by specifying both a row index and a column index, for example grid[row][column]. It gives fast, direct access to any position, which is ideal for representing things that naturally fit a matrix or board, such as a game board, a spreadsheet, or image data.

Linked lists store elements in a chain of nodes connected one after another, with no fixed grid layout and no constant-time two-dimensional access. Binary trees organize data in a branching structure with parent-child relationships, not rows and columns, so indexing by two coordinates isn’t a natural fit. Stacks are linear collections that follow last-in, first-out order, used for ordering tasks or reversing data, rather than representing a grid.