Which of the following statements about manipulating objects in a set is correct?
A)A set iterator visits elements in the order in which they were added to the set.
B)You can remove an element at the position indicated by an iterator.
C)If you try to add an element that already exists, an exception will occur.
D)You can add an element at the position indicated by an iterator.

Question

Quizplus · Accepted Answer

Sets in many programming languages, like Java, allow for the removal of elements using an iterator. This is because iterators provide a way to traverse the set and remove elements without causing ConcurrentModificationException. However, sets do not maintain elements in the order they were added (A is incorrect, as this is a property of Lists or LinkedHashSet in Java, not general Sets), adding an existing element does not throw an exception but simply ignores the addition since sets do not allow duplicate elements (C is incorrect), and you cannot add elements at a specific position indicated by an iterator in a set because sets do not maintain an order of elements for positioning (D is incorrect).

Which of the Following Statements About Manipulating Objects in a Set