Final answer:
Common file formats for each data structure category include CSV and JSON for arrays, plain text files for stacks and queues, and XML and JSON for trees.
Step-by-step explanation:
For the Array data structure, common file formats include CSV (Comma-Separated Values) and JSON (JavaScript Object Notation). These formats are useful for storing arrays of data in a structured way.
For the Linked List data structure, there are no specific file formats commonly associated with it. However, a linked list can be serialized into a file using any file format, such as text or binary formats.
For the Stack and Queue data structures, common file formats include plain text files, where each element is stored on a separate line.
For the Tree data structure, common file formats include XML (eXtensible Markup Language) and JSON, as these formats provide a hierarchical structure suitable for representing tree-like structures.
For the Graph data structure, there are no specific file formats commonly associated with it. However, a graph can be represented in a file using any suitable format, such as adjacency lists or adjacency matrices.