In what situations is it recommended to use data structures?

Data structures are used for efficient data storage and processing. Their use is recommended when:

• Organizing data for quick access (e.g., arrays, hash tables).
• Ensuring ordered storage (lists, trees).
• Implementing specific algorithms (stack for traversal, queue for scheduling).
• Optimizing memory usage and speed.

For example, if you need to store unique elements and quickly check for their presence, a Set is better. If order insertion and quick index access are important, an array or list is suitable.