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 { Â Â Â int data; Â Â Â Node next; Â Â Â Â Â Â Â Node( int data) { Â Â Â Â Â Â Â this .data = data; Â Â Â Â Â Â Â this .next = null ; Â Â Â }} Â class LinkedList { Â Â Â Node head; Â Â Â Â Â Â Â LinkedList() { Â Â Â Â Â Â Â head = null ; Â Â Â } Â Â Â Â Â Â Â void insertAtBeginning ( int data) { Â Â Â Â Â Â Â Node newNode = new Node (data); Â Â Â Â Â Â Â newNode.next = head; Â Â Â Â Â Â Â head = newNode; Â Â Â }}Solution
The code provided is a valid implementation of a singly linked list with an insertion operation at the beginning. Here's 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 node's next to the current head and updating the head to point to the new node.
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