How does implementing a queue on a linked list differ from implementing it on an array?

The difference between implementing a queue on a linked list versus an array is in how memory is stored and managed:

#Queue on an array

• Elements are stored in a contiguous block of memory.
• The head and tail indexes point to the start and end of the queue.
• When the array fills up, it may need to be resized (copied into a new array).
• If implemented as a circular buffer, operations stay O(1) with no shifting.
• Downside: fixed size (unless resized).

#Queue on a linked list

• Each element stores a reference to the next one.
• No need to specify a size in advance: the queue can grow dynamically.
• Adding to the end and removing from the front both take O(1).
• Downside: extra memory for storing references and less compact data layout.

Conclusion: An array is faster and more compact but limited in size. A linked list is more flexible but needs more memory and is slightly slower due to pointer handling.