The On-Chain Quiz System is a blockchain-powered quiz application where questions, answers, and user scores are stored on the blockchain to ensure transparency, trust, and tamper-proof results.
This project demonstrates how smart contracts can be used for education, certification, and fair evaluation by removing the possibility of cheating or data manipulation.
Github link :https://github.com/ankit79600/Quizchain
The mission of this project is to:
Create a trust-based quiz system using blockchain technology.
Provide transparent, immutable learning records for students and developers.
Showcase how decentralized apps (dApps) can solve real problems in education and certification.
Promote hands-on learning of Solidity, Celo blockchain, and smart contract deployment.
This deployment on Celo Sepolia Testnet represents a successful step toward building decentralized education tools.
Traditional online quiz and test platforms face several issues:
Users cannot verify whether their answers were evaluated fairly or if the results were manipulated.
All quiz data is stored in a single server — vulnerable to hacks, edits, or deletion.
Online exams often lack trust, especially for skill verification or blockchain-based learning.
There is no permanent, verifiable record that a user completed a quiz.
The On-Chain Quiz System solves these problems using blockchain:
All questions and correct answers are recorded directly on the blockchain, ensuring transparency.
User results are stored on-chain — meaning no one can edit or delete them.
The blockchain automatically verifies users’ answers using the deployed smart contract.
Anyone can check the quiz results and transactions through Celo Blockscout, making the process open and auditable.
Anyone learning blockchain can use this to understand smart contract deployment and on-chain data storage. 🏫 Educational Institutions & Training Platforms It can be used to build trustworthy quiz/exam systems for: Schools & colleges Bootcamps Online learning platforms Skill assessment portals 💼 Recruiters & Organizations Provides verifiable, tamper-proof proof-of-knowledge for hiring assessments.
