What is the space complexity of arrays compared to linked lists?

What is the space complexity of arrays compared to linked lists?

Arrays have a fixed size, so their space complexity is O(n), where n is the number of elements. Linked lists, on the other hand, have a space complexity of O(n) as well, but they also require additional space for pointers.

Why do linked lists use more memory than arrays?

Linked lists use more memory because each node contains a pointer to the next node, in addition to the data. This overhead can add up, especially for small data sizes.

Are there situations where linked lists are better than arrays?

Yes, linked lists are better when you need frequent insertions and deletions, as they can be done in O(1) time, unlike arrays which require O(n) time for shifting elements.

Can you give an example of when to use each?

Use arrays when you need fast access to elements by index and the size is known. Use linked lists when you need dynamic sizing and frequent modifications.