Question
What will be the output of the following code when
printList is called with a linked list containing the values 1 -> 2 -> 3? class Node:   def __init__(self, data):     self.data = data     self.next = None class LinkedList:   def __init__(self):     self.head = None   def append(self, data):     new_node = Node(data)     if not self.head:       self.head = new_node       return     last_node = self.head     while last_node.next:       last_node = last_node.next     last_node.next = new_node   def printList(self):     current = self.head     while current:       print(current.data, end=" -> ")       current = current.next     print("None") ll = LinkedList() ll.append(1) ll.append(2) ll.append(3) ll.printList()Solution
In this code, a linked list is implemented where each Node contains a data field and a reference to the next node. The LinkedList class provides methods to append nodes and print the list. The append method adds nodes to the end of the list, and printList iterates through the list, printing each node's data followed by " -> ". When nodes with values 1, 2, and 3 are appended, the list becomes 1 -> 2 -> 3, and printList outputs 1 -> 2 -> 3 -> None. Why Other Options Are Wrong: B) 1 -> None: This option is incorrect because it implies that only 1 is in the list, ignoring the 2 and 3 that were appended. C) 2 -> 3 -> None: This option is incorrect because it suggests that the list starts with 2, which is not true since 1 was added first. D) 3 -> 2 -> 1 -> None: This option is incorrect as it represents a reverse order of the list, which does not occur when appending in the given code. E) None: This option is incorrect as it implies there is no output or that the list is empty, which is not the case.
Cabinet has approved the continuation of PM SVANidhi beyond March 2022 till December 2024, what was the budget allocated for this scheme?
To which form of dance, one of the five great epics of Tamil Literature, ‘Silappatikaram’ (2nd Century CE) has a
direct reference?
Recently two new Beaches were added in the coveted list of Blue Beaches, it belong to which State/UTs?
Which state has announced to provide monthly support Rs 3000/- to women under Saubhagya Laxmi Scheme?
According to the September report by DataReportal, which is the most used social media app globally?
Memoirs of Babur or Baburnama is also known as Tuzk-e Babri was written by:
Which of the following books was written by Megasthenes?
Prithviraj Raso, an epic poem about the life of the 12th century Indian king, Prithviraj Chauhan, was written by:
What is the primary objective of deworming livestock? Â
Jayanti Kumaresh is one of the foremost exponents of ________