Hi @shashank
Your understanding is right actually. You can read the below explanation too. I think this will help you.
Array: An array in UiPath has a fixed size, meaning you must specify how many elements it will hold when you create it. Once created, you cannot change this size. If you try to add elements beyond its predefined size using methods like Concat, you’ll create a new array with the combined elements, but not directly modify the original array.
List: A list, on the other hand, is dynamic in size. You don’t need to specify its size when you create it, and it can grow or shrink as needed. In UiPath, lists are managed using the Add to Collection activity, which allows you to add elements one by one without worrying about the size limit.
Regards