It is a complex type (double-ended LL) of a linked list in which a node has two links, one that connects to the next node in the sequence and another that connects to the previous node. This allows traversal across the data elements in both directions.

Examples include:

1. A music playlist with next and previous navigation buttons.

2. The browser cache with BACK-FORWARD visited pages.

3. The undo and redo functionality on a browser, where you can reverse the node to get to the previous page.

**Posted Date**:- 2021-09-09 22:40:22

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