248 results for "gas fees"
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Reply #Discussions
US DeFi Solidity interviews: how to explain external call risks without sounding textbook (reentrancy, reverts, gas grie...
One angle interviewers quietly test is: “Do you understand that external call risk isn’t only ‘hacks’?” Even if you’re safe on reentrancy, external dependencies fail in boring ways: contract paused, upgraded, proxy changed, a token with non...
By AnitaSmartContractSensei · @SmartContractSensei -
Reply #Discussions
US DeFi Solidity interviews: how to explain external call risks without sounding textbook (reentrancy, reverts, gas grie...
I’ve had this asked in Solidity interviews too, and the thing that usually gets you “extra points” is not listing reentrancy first — it’s showing you understand what an external call actually does: you’re handing control + gas...
By MakerInProgress · @MakerInProgress -
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As a Multichain QA Engineer, How Do You Manage Test Coverage Drift When ETH Is Stable but Polygon/BSC Keep Failing?
We built a shared base suite for all networks and then used config overrides for gas, block intervals, and chain IDs. That way, our logic tests remain consistent while adjusting for chain-specific behaviors. You can store these...
By RubenzkArchitect · @zkArchitect -
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Interview question EVM · Solidity timestamp manipulation · Need Practical mitigation tips
More discussion threads to read https://artofblockchain.club/discussion/need-help-with-evm-interview-questions-gas-mapping-slot-packing https://artofblockchain.club/discussion/ethereum-interview-question-how-do-protocol-upgrade...
By Shubhada Pande · @ShubhadaJP -
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How do you explain reentrancy in interviews without sounding like you memorized it?
Tis is a much needed info................i also struggle with this "gas" questions.
By Akemi R · @snappy-bullet -
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Do Seniors Judge Too Harshly in Blockchain Code Reviews?
In my first Web3 company, seniors left short notes like “Not gas-efficient.” Zero explanation. I felt dumb asking. Later I DM’d a senior: “Why gas matters so much in this context?” That one open conversation unlock...
By FintechLee · @FintechLee -
Reply #SC Security
Smart Contract Interview Prep Hub (US-style loops, take-homes, security + proof)
For anyone doing smart contract take-home assignments, here’s the structure I follow (keeps me sane + shows maturity): Problem restated in my own words Constraints + assumptions Threat model / risk list (2–5 items) Tests: “must have” vs “ni...
By FintechLee · @FintechLee -
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How to Audit a Web3 Funnel When Attribution Is Broken and Wallets ≠ Users (Discord → Wallet Connect → First On-Chain Act...
I agree with the idea that the real leak is usually wallet connect → first on-chain action, not “traffic”. In one product I worked on, a big chunk of drop-off was just people getting spooked at the moment they saw gas + signatu...
By ChainPenLilly · @ChainPenLilly -
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Ethereum interview question: what can break in deployed smart contracts after a protocol upgrade?
One thing that often gets glossed over is that saying “deployed smart contracts keep running after Ethereum upgrades” is technically true but practically misleading. Protocol upgrades don’t modify your bytecode, but they absolutely modify t...
By CryptoSagePriya · @CryptoSagePriya -
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Transitioning from TradFi to DeFi Risk: Should I Prioritize Quant Modelling or Smart-Contract Risk?
I’m resurfacing this because the best answers here all point to the same reality: DeFi risk isn’t “just models” — it’s system behavior under stress (oracle lag, MEV, keeper incentives, gas spikes, slippage spirals). Quick quest...
By ChainPenLilly · @ChainPenLilly -
Discussion #Discussions
How to Explain Smart Contract Scaling in Interviews (Real Tradeoffs, Not Definitions)
Hey everyone — I’m preparing for a blockchain dev interview next week and I’m stuck on one question that keeps coming up: “How do you scale smart contracts in the real world?” I understand the basics (gas spikes, congestion, to...
By RubenzkArchitect · @zkArchitect -
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My explanation of zk-SNARKs vs zk-STARKs felt incomplete in an interview — what’s the clear, real-world way to compare t...
This comes up a lot as a blockchain developer interview question: difference between zk-SNARKs and zk-STARKs — and the cleanest answer is to frame it as a deployment decision, not a definitions dump. SNARKs: when you care about tiny proofs...
By Web3WandererAva · @Web3Wanderer