When the order of the elements is unimportant, what is the most efficient way to remove an element from an array?
A)Delete the element and move each element after that one to a lower index.
B)Replace the element to be deleted with the last element in the array.
C)Replace the element to be deleted with the first element in the array.
D)Replace the element with the next element.

Question

Quizplus · Accepted Answer

When the order of the elements is unimportant, replacing the element to be deleted with the last element in the array is the most efficient way because it does not require moving any elements. This operation can be done in constant time O(1), regardless of the size of the array. The other options may require shifting or moving elements, which can take linear time O(n) in the worst case, depending on the position of the element to be deleted.

When the Order of the Elements Is Unimportant, What Is