# What are the consequences of such actions if the

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What are the consequences of such actions? If the array is too large this wastes a lot memory. When the array is full the program may be forced to stop.

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Solution 2: variable size arrays Create an array of a reasonable default capacity. Increase or decrease its size according to the need. This means that the logical size of the array will not correspond to its physical size . Which means that it’s up to the programmer to maintain information about the logical size (the instance variable length of an array refers to its physical size). It’s the responsibility of the programmer to access elements that are below the logical size.
Qualify the behavior of the solution as the size of the array increases. All the elements of the array have to be copied. The more elements there are in the array the more copies are needed. Initially, there are only few elements to be copied, but the larger the array the more copies are needed. Insertion and resize are related to one another. Once the logical size of the array equals its physical size every subsequent insertion necessitates resizing the array, which has a cost proportional to the number of elements in the array.

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A more practical solution consists of doubling the size of the array whenever the logical size of the array equals its physical size. What have achieved? Not all insertions require resizing the array, hence copying its elements. What has been lost? Memory efficiency. for some applications, the logical size of the array can also decrease, in which cases, the physical size of the array could also be decreased whenever the number of elements is below a certain threshold.
1. is the array big enough? 2. where do we start coping the elements? implement remove(int pos)
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