Dataford
Interview QuestionsInterview GuidesExperiencesCoaching
New
Pricing
Get started
Dataford
Popular roles
Software EngineerData AnalystData ScientistData EngineerBusiness AnalystAI EngineerMachine Learning EngineerProduct Manager
Browse
Browse All RolesEvery role hub, from analyst to MLBrowse All CompaniesCompany-specific interview loopsAll Interview GuidesThe full guide library
Top questions by role
Software EngineerData AnalystData ScientistData EngineerBusiness AnalystAI EngineerMachine Learning EngineerProduct Manager
Top questions by skill
SQLPythonStatisticsMachine LearningA/B TestingSystem DesignGenerative AIProduct SenseMetricsBehavioral
Browse all questions →Try a mock interview
Experiences
Practice
Mock InterviewsTimed interview simulations with feedbackCoaching1:1 coaching with people at your target companiesSuccess PathYour 6-week structured planModulesCurated lessons by topicWebinarsTalks from ex-Big Tech data leadsPlaygroundA free-form scratch editor
Learn
BlogInterview strategy and career adviceTech Job Market ReportHiring trends across data and AI rolesFor UniversitiesDataford for career centersAbout DatafordWho we are and how we build
Pricing
Build my plan
Reverse String With Special Characters
00:00
5 left

Reverse String With Special Characters

MediumPython

Problem

Reverse a string without changing the position of special characters.

Treat letters and digits as reversible characters. Every other character, including spaces and punctuation, must remain at its original index.

Implement def reverse_string(s):, which accepts a string and returns the transformed string. The input contains ASCII letters, digits, and special characters.

Constraints

  • 0 <= len(s) <= 10^5
  • s contains only ASCII letters, digits, spaces, and punctuation
  • The relative positions of all non-alphanumeric characters must remain unchanged

Function Signature

def reverse_string(s):
Interviewer

Your question is Reverse String With Special Characters. Start with the requirements in the Question tab.

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.
CodePython 3
Sign up free to run your codeLog inLn 2
Run your code to see test output here.