Reversing Linked List - II

This video tutorial explains how to reverse a singly linked list using a while loop. It begins with setting up the necessary parameters and then delves into the logic of the while loop to update nodes. The tutorial concludes with a discussion on performance, highlighting the time and space complexity of the solution.

What is the initial setup required before starting the reversal of a singly linked list?

• Define three pointers: preceding, current, and succeeding.

• Create a temporary array to store node values.

• Set all node values to zero.

• Initialize a counter to track the number of nodes.

What condition is used to continue the while loop during the reversal process?

• While the head node is not null.

• While the current node is not null.

• While the succeeding node is not null.

• While the preceding node is not null.

What is the purpose of updating the 'current next' pointer during the reversal?

• To point to the succeeding node.

• To point to the last node.

• To point to the preceding node.

• To point to the head node.

After completing the reversal, what should be returned as the new head of the list?

• The preceding node.

• The original head node.

• The last node in the original list.

• The succeeding node.

What was the runtime of the final submission of the code?

• 48 milliseconds

• 28 milliseconds

• 97 milliseconds

• 100 milliseconds

What is the time complexity of the reversal algorithm?

• O(n^2)

• O(log n)

• O(n)

• O(1)

What is the space complexity of the reversal algorithm?

• O(log n)

• O(1)

• O(n)

• O(n^2)