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What does the following Python code snippet accomplish?class LinkedList:    def __init__(self):        self.head = None    def insert_at_beginning(self, data):        new_node = Node(data)        new_node.next = self.head        self.head = new_nodeInserts a new node at the beginning of the linked listDeletes the last node of the linked listAppends a new node to the end of the linked listReverses the linked list

Question

What does the following Python code snippet accomplish?class LinkedList:    def init(self):        self.head = None    def insert_at_beginning(self, data):        new_node = Node(data)        new_node.next = self.head        self.head = new_nodeInserts a new node at the beginning of the linked listDeletes the last node of the linked listAppends a new node to the end of the linked listReverses the linked list

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Solution

The provided Python code snippet defines a class for a linked list and a method to insert a new node at the beginning of the linked list.

Here's a step-by-step explanation:

  1. The LinkedList class is defined with an __init__ method. This method is a constructor that's called when an object is created from the class. It sets the head attribute of the LinkedList object to None, indicating that the list is initially empty.

  2. The insert_at_beginning method is defined. This method takes data as a parameter, which is the data to be stored in the new node.

  3. Inside insert_at_beginning, a new node is created with the provided data by calling Node(data). This new node is assigned to the variable new_node.

  4. The next attribute of new_node is set to the current head of the list. This means that new_node is now pointing to the node that was previously the first node of the list.

  5. The head attribute of the list is updated to new_node, making it the first node of the list.

So, the correct answer to your question is: "Inserts a new node at the beginning of the linked list".

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