Which of the following methods is best for reversing a singly linked list in place (changing an existing list)? *1 pointa) Using a stack to store the nodes and then rebuilding the listb) Using recursion to reverse the listc) Using an iterative approach with three pointers (prev, curr, next)d) Creating a new reversed list and copying the nodes from the original list
Question
Which of the following methods is best for reversing a singly linked list in place (changing an existing list)? *1 pointa) Using a stack to store the nodes and then rebuilding the listb) Using recursion to reverse the listc) Using an iterative approach with three pointers (prev, curr, next)d) Creating a new reversed list and copying the nodes from the original list
Solution
The best method for reversing a singly linked list in place (changing an existing list) is c) Using an iterative approach with three pointers (prev, curr, next).
Here's why:
a) Using a stack to store the nodes and then rebuilding the list: This method requires extra space to store the nodes in a stack, which is not efficient.
b) Using recursion to reverse the list: This method can lead to a stack overflow if the list is too long, because each recursive call adds a layer to the system call stack.
c) Using an iterative approach with three pointers (prev, curr, next): This method does not require extra space and will not cause a stack overflow. It simply involves changing the pointers of each node to point to the previous node.
d) Creating a new reversed list and copying the nodes from the original list: This method is not in place because it requires extra space to create a new list.
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