When an array myArray is only partially filled, how can the programmer keep track of the current number of elements?
A)access myArray.length()
B)maintain a companion variable that stores the current number of elements
C)access myArray.currentElements()
D)access myArray.length() - 1

Question

Quizplus · Accepted Answer

When an array is only partially filled, the programmer should maintain a companion variable that stores the current number of elements. This variable can be incremented or decremented whenever an element is added or removed from the array, respectively. Accessing myArray.length() would not provide an accurate count of the current number of elements, as this returns the total length of the array (including any unused elements). Accessing myArray.currentElements() is not a valid method in Java, and accessing myArray.length() - 1 would not provide an accurate count if the array is completely empty.

When an Array MyArray Is Only Partially Filled, How Can