In two-dimensional arrays, how are elements typically addressed?

• A. By two indices, one for row and one for column
• B. By a single index
• C. By a key
• D. By a hash

Answer: (A)

Two-dimensional arrays are accessed using two indices: one for the row and one for the column. This mirrors the grid-like structure where each element sits at the intersection of a specific row and a specific column. In code you’ll typically see something like array[row][column], which directly picks the element at that exact position. If you only had a single index, you’d be treating the data as one long line rather than a grid, which isn’t how 2D arrays are organized. Keys or hashes are used for maps of values keyed by arbitrary labels, not for direct addressing in a numeric grid of elements.