Given the partial LinkedList class declaration below, select a statement to complete the printFirst method, which is designed to display the contents of the first list element.
A)System.out.println(first);
B)System.out.println(first.data);
C)System.out.println(first.next);
D)System.out.println(Node.data);

Question

Given the partial LinkedList class declaration below, select a statement to complete the printFirst method, which is designed to display the contents of the first list element.  
A)System.out.println(first); 
B)System.out.println(first.data); 
C)System.out.println(first.next); 
D)System.out.println(Node.data);

Quizplus · Accepted Answer

We need to print the data of the first element, so we should access "first.data". Option A would print the reference to the first node object, not its data. Option C would print the reference to the second node object, which is not what we want. Option D is incorrect syntax, as "Node" is not a defined variable.

Given the Partial LinkedList Class Declaration Below, Select a Statement