Given the HashSet class implementation discussed in section 16.4 (partially shown below), select the statement needed to complete the clear method, which is designed to remove all elements from the set.
A)buckets[j] = 0;
B)buckets[j] = new Node();
C)buckets[j] = null;
D)buckets[j] = new LinkedList();

Question

Given the HashSet class implementation discussed in section 16.4 (partially shown below), select the statement needed to complete the clear method, which is designed to remove all elements from the set.  
A)buckets[j] = 0; 
B)buckets[j] = new Node(); 
C)buckets[j] = null; 
D)buckets[j] = new LinkedList();

Quizplus · Accepted Answer

Setting the bucket array to null will remove all references to the nodes and allow them to be garbage collected. Setting the bucket to 0 or a new node or a new linked list will not remove the existing nodes and could leave memory leaks.

Given the HashSet Class Implementation Discussed in Section 16