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  • Difficulty - Medium
    Total Plays - 8
    Allowed Time - 10 sec
    Best time - 10

    Why are multi-step writes risky?

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

    #A
    #B
    #C
    #D
    Explanation:
    Multi-step operations can leave the contract in a partially updated state if execution halts. Attackers exploit these interim states to bypass checks.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 6
    Allowed Time - 10 sec
    Best time - 5.375

    Why is SELFDESTRUCT dangerous in proxies?

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

    #A
    #B
    #C
    #D
    Explanation:
    If the implementation contract is self-destructed, proxies break permanently or redirect unexpectedly. This creates bricked contracts and undefined behavior
    Leaderboard
  • Difficulty - Medium
    Total Plays - 9
    Allowed Time - 10 sec
    Best time - 10

    What does RETURNDATASIZE prevent?

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

    #A
    #B
    #C
    #D
    Explanation:
    RETURNDATASIZE ensures the caller knows exactly how many bytes were returned. It prevents incorrect assumptions and truncation bugs during low-level calls.
    Leaderboard
  • ChainPenLilly
    ChainPenLilly
    @ChainPenLilly • Nov 28, 2025
    Nov 28, 2025
    349

    How do you rebuild clarity in a smart contract team when owner-driven docs slip, handovers get messy, and weekly alignment stops working?

    I’m a mid-level smart contract developer in a small DeFi team, and I’m noticing a pattern: every time deadlines get tight, clarity collapses. Owner-driven docs start slipping, handovers get messy,...

    Like 0 Replies 1
  • smith taylor
    smith taylor
    @kmBguOK • Nov 28, 2025
    Nov 28, 2025
    720

    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
  • Difficulty - Medium
    Total Plays - 14
    Allowed Time - 10 sec
    Best time - 1.846

    Why is storing large arrays on-chain discouraged?

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

    #A
    #B
    #C
    #D
    Explanation:
    Storage is the most expensive resource in the EVM. Large arrays result in high operational cost and poor long-term scalability.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 14
    Allowed Time - 10 sec
    Best time - 0.675

    Why is using block.timestamp in fairness-critical logic dangerous?

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

    #A
    #B
    #C
    #D
    Explanation:
    Miners can adjust timestamps within a reasonable range, enabling subtle manipulation. This can affect auctions, lotteries, and reward systems
    Leaderboard
  • Damon Whitney
    Damon Whitney
    @CareerSensei • Nov 26, 2025
    Nov 26, 2025
    696

    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
  • Amanda Smith
    Amanda Smith
    @AmandaS • Nov 26, 2025
    Nov 26, 2025
    2.3K

    I Know Solidity, but Interviews Now Feel Like Security Exams — What Advanced Questions Should I Really Prepare For?

    I’ve been writing Solidity for a few years now — mostly production contracts, not tutorials — but the interviews I’m getting lately feel completely different. They used to be about...

    Like 14 Replies 6
  • Difficulty - Medium
    Total Plays - 8
    Allowed Time - 10 sec
    Best time - 3.010

    5. Why is delegatecall risky?

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

    #A
    #B
    #C
    #D
    Explanation:
    delegatecall executes callee code in the caller’s storage context, leading to storage collisions and privilege escalation. This is a key attack vector in proxy contracts.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 7
    Allowed Time - 10 sec
    Best time - 10

    4. Which opcode is responsible for dynamic memory expansion cost?

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

    #A
    #B
    #C
    #D
    Explanation:
    MSTORE triggers memory expansion when writing to higher memory slots. Memory grows quadratically, so developers must understand how loops and large arrays impact gas.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 9
    Allowed Time - 10 sec
    Best time - 4.033

    What happens if a constructor of a deployed contract reverts?

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

    #A
    #B
    #C
    #D
    Explanation:
    If the constructor reverts, the entire deployment fails and no contract is created. This prevents partially-initialized smart contracts from being pushed on-chain
    Leaderboard
  • Arif
    Arif
    @ofh3VYy • Nov 25, 2025
    Nov 25, 2025
    429

    🚀 I Want to Become a StarkNet/Cairo Auditor — Here’s My Starting Point & I’d Love a Roadmap

    I’m transitioning my focus toward StarkNet and Cairo security auditing and would appreciate guidance from anyone experienced in the ecosystem. What I know so far: • Solidity development • Hardhat,...

    Like 3 Replies 4
  • Difficulty - Medium
    Total Plays - 6
    Allowed Time - 10 sec
    Best time - 4.975

    1. What does EXTCODEHASH primarily help detect?

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

    #A
    #B
    #C
    #D
    Explanation:
    EXTCODEHASH returns the hash of a contract’s deployed bytecode, allowing detection of code changes or empty accounts. Auditors use it to verify contract identity and defend against unexpected contract replacement patterns
    Leaderboard
  • Difficulty - Medium
    Total Plays - 9
    Allowed Time - 10 sec
    Best time - 5.082

    What is the main security benefit of using immutable variables?

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

    #A
    #B
    #C
    #D
    Explanation:
    immutable variables are stored directly in bytecode, not in storage, reducing runtime gas and preventing accidental overwrites. It is a common optimization technique in gas-efficient contract design.
    Leaderboard
  • Victor Anderson
    Victor Anderson
    @victor-anderson • Nov 23, 2025
    Nov 23, 2025
    1.9K

    Solidity Gas Optimization in Interviews: Why Juniors Fail the Question and What Seniors Actually Look For

    I realized recently that I’ve been approaching “gas optimization” totally wrong in interviews. Every time the question comes up, I start dumping the usual lines — avoid storage writes, use...

    Like 2 Replies 4
  • Sayali Bhandari
    Sayali Bhandari
    @SayaliB • Nov 23, 2025
    Nov 23, 2025
    468

    Smart Contract Salary Negotiation in Remote Teams — How Do You Stay Fair Without Losing Leverage?

    Salary negotiations in smart contract roles feel different from Web2. In remote-first teams, people earn from 6–40 LPA (and globally, $60K–$220K), and yet nobody really knows what “fair” looks like....

    Like 1 Replies 5
  • Andria Shines
    Andria Shines
    @ChainSage • Nov 29, 2025
    Nov 29, 2025
    781

    How do I craft a 60-second founder-focused pitch as a junior Solidity developer when my repos are small but real?

    I’ve been trying to break into Solidity roles for three months, and founder responses confuse me more than recruiter responses. Recruiters ask for resumes, keywords, portfolios… but founders jump straight...

    Like 4 Replies 7
  • Ayush Verma
    Ayush Verma
    @NawtFound404 • Nov 20, 2025
    Nov 20, 2025
    531

    Silent Fails in Smart-Contract Access Control: What Teams Miss Until It’s Too Late

    While practicing with Slither/Mythril and extracting CFGs from Solidity contracts, I keep noticing a pattern:Teams don’t get hacked because of complex bugs.They get hacked because of small access-control oversights. Examples...

    Like 3 Replies 3
  • SolidityStarter
    SolidityStarter
    @SolidityJatin • Nov 17, 2025
    Nov 17, 2025
    823

    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...

    Like 5 Replies 9
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