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In a doubly linked list, how do you delete a node given only a pointer to that n

Practice Questions

Q1
In a doubly linked list, how do you delete a node given only a pointer to that node?
  1. Set next and previous pointers
  2. Traverse from head
  3. Use a stack
  4. Not possible

Questions & Step-by-Step Solutions

In a doubly linked list, how do you delete a node given only a pointer to that node?
  • Step 1: Identify the node you want to delete. Let's call this node 'NodeToDelete'.
  • Step 2: Access the previous node of 'NodeToDelete'. Let's call this 'PrevNode'.
  • Step 3: Access the next node of 'NodeToDelete'. Let's call this 'NextNode'.
  • Step 4: Set the 'next' pointer of 'PrevNode' to point to 'NextNode'. This connects the previous node to the next node.
  • Step 5: Set the 'previous' pointer of 'NextNode' to point to 'PrevNode'. This connects the next node back to the previous node.
  • Step 6: Optionally, clear the pointers of 'NodeToDelete' to help with garbage collection (if needed).
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