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# Chapter 4. Arrays and Linked Lists
![Arrays and Linked Lists ](../assets/covers/chapter_array_and_linkedlist.jpg ){ class="cover-image" }
!!! abstract
The world of data structures resembles a sturdy brick wall.
In arrays, envision bricks snugly aligned, each resting seamlessly beside the next, creating a unified formation. Meanwhile, in linked lists, these bricks disperse freely, embraced by vines gracefully knitting connections between them.
## Chapter Contents
- [4.1 Array ](https://www.hello-algo.com/en/chapter_array_and_linkedlist/array/ )
- [4.2 Linked List ](https://www.hello-algo.com/en/chapter_array_and_linkedlist/linked_list/ )
- [4.3 List ](https://www.hello-algo.com/en/chapter_array_and_linkedlist/list/ )
- [4.4 Memory and Cache ](https://www.hello-algo.com/en/chapter_array_and_linkedlist/ram_and_cache/ )
- [4.5 Summary ](https://www.hello-algo.com/en/chapter_array_and_linkedlist/summary/ )