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  • Difficulty - Medium
    Total Plays - 16
    Allowed Time - 10 sec
    Best time - 3.590

    Which keyword prevents further inheritance of a contract?

    Tip: Click "Play" to reveal options and start playing.

    #A
    #B
    #C
    #D
    Explanation:
    Solidity does not support a final or sealed keyword for contracts. Any contract can be inherited unless architectural constraints are enforced manually.
    Leaderboard
  • MakerInProgress

    MakerInProgress

    @MakerInProgress • Dec 14, 2025
    Dec 14, 2025
    609

    I’m preparing for a system design interview. How do you explain blockchain consensus trade-offs without going too deep?

    I’ve got a system design interview coming up for a blockchain role, and I’m struggling with how to talk about consensus algorithms without either oversimplifying or going way too deep.In...
    Like 5 Replies 3
  • Difficulty - Medium
    Total Plays - 11
    Allowed Time - 10 sec
    Best time - 3.307

    Why should developers avoid using tx.origin for authentication?

    Tip: Click "Play" to reveal options and start playing.

    #A
    #B
    #C
    #D
    Explanation:
    Attackers can trick users into calling a malicious contract. That contract then makes a call where tx.origin equals the victim’s address. This bypasses access control and leads to unauthorized actions.
    Leaderboard
  • Sreya Nair

    Sreya Nair

    @1DXs7Yt • Dec 5, 2025
    Dec 5, 2025
    411

    How do freshers actually get a blockchain/Web3 internship or job today?

    I've been struggling to find internships or jobs in the blockchain/web3 industry despite multiple applications. I'm looking for advice on how to break into this competitive field and what specific...
    Like 5 Replies 3
  • ChainMentorNaina

    ChainMentorNaina

    @ChainMentorNaina • Dec 4, 2025
    Dec 4, 2025
    1.3K

    I’m a Junior dApp Developer and Community Upgrades Were Chaos — How Do I Explain This Safely in Interviews?

    I’m a junior dApp developer with just under a year of experience, and I’m switching jobs soon. One thing that still bothers me from my last role is how messy...
    Like 5 Replies 4
  • smith taylor

    smith taylor

    @kmBguOK • Nov 28, 2025
    Nov 28, 2025
    493

    Final Year, 2 Internships Done — How Do I Get My First Full-Time Blockchain Developer Role?

    I’m in my final year of college and just wrapped up two internships, but I still don’t have a full-time blockchain developer offer. Both internships were with small startups where...
    Like 5 Replies 4
  • Damon Whitney

    Damon Whitney

    @CareerSensei • Nov 26, 2025
    Nov 26, 2025
    469

    Burned Out as a Blockchain Developer in Dubai — Is Switching to DevRel Actually a Better Long-Term Career Move?

    I’m honestly feeling burned out after 3+ years working as a blockchain developer in Dubai. Long hours, late-night deployments, nonstop tech changes… it’s draining. I still care about Web3, but...
    Like 5 Replies 6
  • SolidityStarter

    SolidityStarter

    @SolidityJatin • Nov 17, 2025
    Nov 17, 2025
    541

    MEV Jobs Require Experience But I'm Junior - How Do I Get Hands-On MEV Experience for Interview Success?

    The job description asks for experience with MEV. As a junior, how can I possibly get hands-on experience with this to apply for roles?I've been working and studying Solidity and...
    Like 5 Replies 9
  • AlexDeveloper

    AlexDeveloper

    @Alexdeveloper • Nov 14, 2025
    Nov 14, 2025
    188

    How Should Web3 Product Ops Teams Build Incident Response Playbooks After Mainnet Failures?

    Last week, our NFT bridge malfunctioned during a mainnet upgrade — 37 stuck transactions, $40K locked for 12 hours. Engineering fixed it quickly, but Product Ops was unprepared. No one...
    Like 5 Replies 2
  • Difficulty - Medium
    Total Plays - 8
    Allowed Time - 10 sec
    Best time - 1.216

    Why snapshot testing helps?

    Tip: Click "Play" to reveal options and start playing.

    #A
    #B
    #C
    #D
    Explanation:
    Snapshots capture the contract’s state at a moment in time. They help debug failed transactions and compare pre- and post-execution states.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 9
    Allowed Time - 10 sec
    Best time - 1.151

    Why use modifiers carefully?

    Tip: Click "Play" to reveal options and start playing.

    #A
    #B
    #C
    #D
    Explanation:
    Modifiers improve smart contract readability but can cause hidden logic issues if used carelessly. Always review how each modifier changes access or conditions.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 9
    Allowed Time - 10 sec
    Best time - 1.518

    Which bug class often goes unnoticed during audits?

    Tip: Click "Play" to reveal options and start playing.

    #A
    #B
    #C
    #D
    Explanation:
    Logical bugs can’t be found by tools; they require clear understanding of how the business rules actually work. A developer must manually verify that the code’s behavior matches real-world logic.
    Leaderboard
  • ChainMentorNaina

    ChainMentorNaina

    @ChainMentorNaina • Nov 8, 2025
    Nov 8, 2025
    1.4K

    Is it right move for Full-Stack Developers Switch to Blockchain Careers in 2025?

    I’ve been a React/Node.js full-stack developer for 5 years and recently got an offer from a DeFi startup. The role sounds exciting, but I’m torn between risk and opportunity. Is...
    Like 5 Replies 3
  • Sheza Henry

    Sheza Henry

    @ChainVisionary • Nov 5, 2025
    Nov 5, 2025
    482

    Where Do Smart Contract Developers Draw the Ethical Line When Joining High-Risk DeFi Protocols?

    Hey everyone,I’ve been developing smart contracts for over two years now—mostly audit-clean DeFi tools and staking modules. Recently, I was approached to work with a DeFi protocol that’s been called...
    Like 5 Replies 5
  • ChainMentorNaina

    ChainMentorNaina

    @ChainMentorNaina • Oct 28, 2025
    Oct 28, 2025
    320

    CEI rule in interviews — when do you actually break it without breaking the contract?

    Everyone tells juniors: “Follow Checks-Effects-Interactions.” ✅But the moment a Solidity interview goes deeper — we freeze. 😅Real world smart contract security isn’t just memorizing rules. Sometimes you do call external...
    Like 5 Replies 4
  • Difficulty - Medium
    Total Plays - 16
    Allowed Time - 10 sec
    Best time - 2.464

    Why might a contract work on testnet but fail on mainnet?

    Tip: Click "Play" to reveal options and start playing.

    #A
    #B
    #C
    #D
    Explanation:
    Mainnets often have stricter gas limits and higher costs than testnets. A function that runs fine on testnet may exceed block gas limits in production. Developers should simulate deployments and optimize loops before mainnet release
    Leaderboard
  • Shubhada Pande

    Shubhada Pande

    @ShubhadaJP • Sep 13, 2025
    Sep 13, 2025
    637

    From Play-to-Earn to GameFi: Blockchain Gaming Developer Career Roadmap, Salaries & Skills 2025

    From Play-to-Earn to GameFi: Blockchain Gaming Developer Career Roadmap, Salaries & Skills 2025
    The fusion of blockchain and gaming is transforming digital entertainment and professional opportunity. As play-to-earn (P2E) and GameFi models surge, blockchain gaming developers are now among the most sought-after professionals...
    Like 5 Replies 1
  • Shubhada Pande

    Shubhada Pande

    @ShubhadaJP • Dec 18, 2025
    Dec 18, 2025
    1.4K

    Blockchain Developer Resume Guide (2025): How Web3 Recruiters Shortlist Candidates

    Blockchain Developer Resume Guide (2025): How Web3 Recruiters Shortlist Candidates
    Landing a blockchain job in 2025 takes more than “knowing Solidity” or completing a few tutorials. Your resume is still the gateway — but Web3 hiring has changed. Recruiters and...
    Like 5 Replies 1
  • Kaustubh

    Kaustubh

    @kaustubh • Sep 4, 2025
    Sep 4, 2025
    343

    How'd you explain Blockchain to a 5 and a 10 Year Old?

    Just curious - how’d you go about explain what blockchain is to a 5 and a 10 year old? Someone asked me - and I couldn’t. Let me know.
    Like 5 Replies 2
  • Riddhi R.

    Riddhi R.

    @tZONuaB • Jun 28, 2025
    Jun 28, 2025
    423

    Need Help for using faucet

    Hello, I am learning blockchain. I am trying to get free testnet tokens from the faucets, but almost all of them asks to get a certain balance of eth even...
    Like 5 Replies 2
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