Arrays are contiguous in memory which allows the access time to be constant, whereas, in linked lists, you do not have the luxury of contiguous memory.

You should probably keep in mind the table above when it comes to trade-offs between arrays and linked lists. If you’re given a problem, you might want to consider whether or not an array is the preferred data structure. For that assessment, you will need to be aware of the pros and cons of the two data structures.