Question

Which best describes this axiom:

aList.getLength() = (aList.remove(i)).getLength ( ) + 1

A. Removing an item from an existing list decreases its length by one
B. Removing an item from an existing list increases the list size by one
C. None of these
D. You cannot remove an item from from existing list that is empty

Answer 1

The axiom indicates that removing an item from a list decreases its length by one, aligning with Option A.

Step-by-step explanation:

The given axiom suggests a relationship between the length of a list before and after an item is removed. Specifically, it indicates that if you remove an item from an existing list, the length of the list will decrease by one. You can understand this through the equation: aList.getLength() = (aList.remove(i)).getLength() + 1. This means the original length of the list (aList.getLength()) is equal to the length of the list after removing an item (aList.remove(i)).getLength()) plus one. Therefore, the best description of this axiom is: Removing an item from an existing list decreases its length by one (Option A).