Dataford
Interview QuestionsInterview GuidesExperiencesMock InterviewsPricing
Get started

Reverse a Linked List

EasyPython00:00
Practice interviewer
In session
5 left
00:00

Your question is Reverse a Linked List. Start with the requirements on the right.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

You need to log in / sign up to run or submit.

Problem

Write a program to reverse a linked list, both iteratively and recursively.

Implement both approaches for a singly linked list. Each function receives the head of a ListNode chain and returns the new head. For evaluation, linked lists are represented as arrays of node values, with [] representing an empty list.

Required functions

  • reverse_linked_list(head) using iteration.
  • reverse_linked_list_recursive(head) using recursion.

Constraints

  • 0 <= number of nodes <= 10^4
  • Node values are integers
  • The list is singly linked
  • Reverse the list in place without creating replacement nodes

Function Signature

def reverse_linked_list(head):
Your solutionPython 3
You need to log in / sign up to run or submit.
Run your code to see test output