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What is the time complexity of deleting a node from a linked list when you have

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Question: What is the time complexity of deleting a node from a linked list when you have a pointer to that node?

Options:

  1. O(1)
  2. O(n)
  3. O(log n)
  4. O(n^2)

Correct Answer: O(1)

Solution: 

If you have a pointer to the node to be deleted, you can delete it in constant time O(1) by adjusting pointers.

What is the time complexity of deleting a node from a linked list when you have

Practice Questions

Q1
What is the time complexity of deleting a node from a linked list when you have a pointer to that node?
  1. O(1)
  2. O(n)
  3. O(log n)
  4. O(n^2)

Questions & Step-by-Step Solutions

What is the time complexity of deleting a node from a linked list when you have a pointer to that node?
  • Step 1: Identify the node you want to delete. You already have a pointer to this node.
  • Step 2: Change the pointer of the previous node to point to the next node of the node you want to delete.
  • Step 3: If necessary, clear the data in the node you are deleting to help with garbage collection.
  • Step 4: The node is now effectively removed from the linked list.
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