What distinguishes linear data structures from non-linear data structures?

The distinguishing feature of linear data structures is that they arrange elements in a sequential order. This means that each element in a linear structure is connected to and follows the previous one in a single sequence. Common examples of linear data structures include arrays, linked lists, and queues, where the organization of elements is such that they can be traversed in a single direction. This sequential arrangement allows for straightforward data manipulation and retrieval since each element has a single predecessor and successor within the structure, making the process predictable.

In contrast, non-linear data structures, such as trees and graphs, do not follow this linear arrangement. They can branch out and connect in many different ways, allowing for complex relationships between elements. The key aspect of linear data structures is this consistent, predictable order, which is essential for algorithms that rely on sequential access.