We're in development. Going live soon.
101OneNoughtOne

Practice

Build, debug and explain your way to stronger skills.
All practice problemsCoding, design and hands-on challenges.Repository CodingHands-onFix bugs and build in a real codebase.Code ReviewHands-onFind risks and explain your verdict.Data structures & algorithmsCore patterns to advanced algorithms.Machine learningImplement ML and numerical methods.SQL & databasesQueries, data and analytical problems.HLD system designScalable architecture and tradeoffs.LLD system designObjects, interfaces and behavior.Aptitude & previous-year papersAptitude topics and exam practice.AI interview prepRehearse interviews with an AI tutor.Online compilerWrite and run code in your browser.

Learn

Follow a path, explore a concept or study at your own pace.
Learning pathsConnect lessons, visualizers and practical challenges.Algorithm visualizersStep through algorithms and see how they work.Books & readingBring your PDFs, take notes and study with AI.Daily current affairsUnderstand the news, save notes and revise the brief.Data structures & algorithmsLearn the foundations of efficient problem solving.Machine learningBuild mathematical intuition and explore ML concepts.SQL & databasesUnderstand data models, queries and transactions.System designStudy architecture, distributed systems and object design.
Find jobsMy access
LoginRegister
HomeCookie Policy
Trust, in plain sight

Cookie Policy

This policy explains how we use cookies and similar technologies to recognize you when you visit our platform.

Last updated · September 28, 2026

On this page

  1. 01What Are Cookies?
  2. 02How We Use Cookies
  3. 03Types of Cookies We Use
  4. 04Third-Party Cookies
  5. 05Managing Your Cookie Preferences
  6. 06Updates to This Policy
  7. 07Contact Us

Need help understanding something?

Talk to us
On this page
  1. 01What Are Cookies?
  2. 02How We Use Cookies
  3. 03Types of Cookies We Use
  4. 04Third-Party Cookies
  5. 05Managing Your Cookie Preferences
  6. 06Updates to This Policy
  7. 07Contact Us
01

What Are Cookies?

Cookies are small text files that are stored on your device (computer, tablet, or mobile) when you visit a website. They help websites remember your preferences and understand how you use the site.

We also use similar technologies like local storage, session storage, and pixels, which work in similar ways. Throughout this policy, we refer to all of these technologies as "cookies."

02

How We Use Cookies

We use cookies for the following purposes:

  • Authentication: To recognize you when you sign in and keep you logged in
  • Security: To protect your account and prevent fraud
  • Preferences: To remember your settings and customizations (like theme preferences)
  • Analytics: To understand how visitors interact with our platform
  • Performance: To monitor and improve site speed and functionality
  • Advertising: Google AdSense may use cookies to serve and measure ads for guests and free users on selected pages
03

Types of Cookies We Use

Essential Cookies

These cookies are necessary for the platform to function properly. They enable core functionality such as security, authentication, and session management. You cannot opt out of these cookies.

  • Session cookies for authentication
  • Security cookies to prevent cross-site request forgery
  • Load balancing cookies for performance

Preference Cookies

These cookies allow us to remember choices you make (such as your theme preference or code editor settings) to provide a more personalized experience.

  • Theme preferences (light/dark mode)
  • Editor settings (font size, layout preferences)
  • Language preferences

Analytics Cookies

These cookies help us understand how visitors interact with our platform by collecting and reporting information anonymously.

  • Page views and navigation patterns
  • Time spent on pages
  • Error logging and performance metrics
04

Third-Party Cookies

Some cookies are placed by third-party services that appear on our pages. We use the following third-party services:

  • Vercel Analytics: For anonymous usage statistics and performance monitoring
  • Authentication Providers: When you sign in with Google, GitHub, or other providers
  • Payment Processors: For secure payment processing
  • Google AdSense: Google and its advertising partners may use cookies to serve ads based on visits to this and other websites. You can manage personalized advertising at Google My Ad Center and learn more about Google advertising technologies.

These third parties have their own privacy policies governing the use of their cookies.

05

Managing Your Cookie Preferences

You can control and manage cookies in various ways. Most web browsers allow you to:

  • View what cookies are stored and delete them individually
  • Block third-party cookies
  • Block all cookies from specific sites
  • Block all cookies from being set
  • Delete all cookies when you close your browser

Please note that blocking or deleting cookies may impact your experience on our platform. Some features may not function properly without essential cookies.

To manage cookies in your browser, visit your browser's help documentation:

  • Chrome: Settings → Privacy and Security → Cookies
  • Firefox: Settings → Privacy & Security → Cookies
  • Safari: Preferences → Privacy → Cookies
  • Edge: Settings → Privacy, search, and services → Cookies
06

Updates to This Policy

We may update this Cookie Policy from time to time to reflect changes in our practices or for legal, operational, or regulatory reasons. When we make changes, we will update the "Last updated" date at the top of this page.

We encourage you to review this policy periodically to stay informed about our use of cookies.

07

Contact Us

If you have any questions about our use of cookies, please contact us at:

  • Email: privacy@onenoughtone.com
  • Website: onenoughtone.com/contact
101OneNoughtOne

Built one step
at a time.

Learn a concept. Solve a problem. Build something real. Your next chapter starts here.

Find your next challenge Explore the curriculum

Learn

  • DSA
  • HLD System Design
  • LLD System Design
  • Machine Learning
  • SQL & Databases
  • Practice Problems
  • Full Curriculum
  • Aptitude and PYQs

Resources

  • Algorithm Visualizers
  • Computer Networks
  • Operating Systems
  • Interview Prep
  • Learning Roadmap
  • Database Management
  • Repository Coding
  • Code Review

Company

  • Pricing
  • Contact
  • Find Jobs
  • Job Assistant
  • For Hiring Teams
  • For Institutions

Legal

  • Terms & Conditions
  • Privacy Policy
  • Cookie Policy
  • Security
  • Accessibility

Online Compilers

  • All Compilers
  • Python Compiler
  • C++ Compiler
  • Java Compiler
  • JavaScript Compiler
  • Go Compiler
  • Rust Compiler

From first principles to first offer.
© 2026 OneNoughtOne. All rights reserved.

OneNoughtOne