Question

Which of the following code snippets correctly implements a singly linked list in Java, including the ability to insert a new node at the beginning? class Node { int data; Node next; Node( int data) { this .data = data; this .next = null ; }} class LinkedList { Node head; LinkedList() { head = null ; } void insertAtBeginning ( int data) { Node newNode = new Node (data); newNode.next = head; head = newNode; }}

Q: Answer-Which of the following code snippets correctly implements a singly linked list in Java, including t...

The code provided is a valid implementation of a singly linked list with an insertion operation at the beginning. Heres why A is the correct answer Node class defines a single node with data and next reference. LinkedList class manages the list and allows for the insertion of a new node at the beginning by setting the new nodes next to the current head and updating the head to point to the new node. B is incorrect because the method should logically be in the LinkedList class to encapsulate list operations. C is incorrect as the next reference is correctly initialized to null . D is incorrect modifying the head is exactly what is needed when inserting at the beginning. E is incorrect as the list is meant to be singly linked, not circular.

A The code correctly implements a singly linked list with the insertion at the beginning.

B The insertAtBeginning method should not be in the LinkedList class

C The Node constructor does not correctly initialize the next reference

D The insertAtBeginning method incorrectly modifies the head of the list.

E The code should implement a circular linked list, not a singly linked list.

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