248 results for "gas fees"
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Reply #Discussions
EVM Interview Questions for Solidity Developers: How to Tackle Gas Optimization, Storage Layouts, and Delegatecall Scena...
When preparing for Solidity interviews, one area developers often overlook is how contracts are deployed inside the Ethereum Virtual Machine, specifically through the CREATE and CREATE2 opcodes. I was once asked to explain why deterministic...
By Angela R · @Web3SkillMapper -
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EVM Interview Questions for Solidity Developers: How to Tackle Gas Optimization, Storage Layouts, and Delegatecall Scena...
I faced a full round focused only on EVM internals. They started from transaction lifecycle—nonce, calldata, and gas limits—and moved to storage access. One question: “Explain warm vs cold SLOAD.” Anothe...
By AlexDeveloper · @Alexdeveloper -
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EVM Interview Questions for Solidity Developers: How to Tackle Gas Optimization, Storage Layouts, and Delegatecall Scena...
I completely get what you’re feeling—EVM looks intimidating until you connect Solidity with the underlying bytecode. Interviewers usually test execution flow understanding more than theory. Expect questions like: “How does...
By Bondan S · @Layer1Bondan -
Discussion #SC Security
Blockchain QA & Smart Contract Testing Hub (Coverage, Flaky Tests, Gas + Proof)
Smart contract testing is the practice of validating on-chain business logic under adversarial and network-dependent conditions — where “passing tests” does not automatically mean “safe in production.” This hub is for blockchain QA engineer...
By Shubhada Pande · @ShubhadaJP -
Reply #SC Security
Blockchain QA & Smart Contract Testing Hub (Coverage, Flaky Tests, Gas + Proof)
Smart contract QA candidates get filtered for a simple reason: their resume reads like generic QA even when the work is real. This hub is the “proof-first” view of QA — flaky tests, coverage drift, gas validation, audit-aligned...
By Shubhada Pande · @ShubhadaJP -
Reply #SC Security
Blockchain QA & Smart Contract Testing Hub (Coverage, Flaky Tests, Gas + Proof)
Smart contract QA isn’t just about writing more tests — it’s about how you think under irreversible conditions.In Web3, QA failures don’t usually surface as “bugs.” They surface as incidents, exploits, ha...
By Shubhada Pande · @ShubhadaJP -
Discussion #Discussions
When preparing for smart contract interviews, how much does gas optimization really matter?
I’m preparing for smart contract interviews and keep running into the same advice everywhere: learn gas optimization really well.I understand the basics — storage vs memory, packing variables, avoiding unnecessary w...
By Sayali Bhandari · @SayaliB -
Discussion #Discussions
As a junior Solidity dev, how deep should I really go into gas optimization during interviews?
I’ve noticed that most junior Solidity interviews don’t dive too heavily into gas micro-optimizations unless it’s for a DeFi or L2 project where every extra transaction cost matters. What interviewers really w...
By Web3Learner_Abaz · @Web3LearnerAbaz -
Discussion #Discussions
US DeFi Solidity interviews: how to explain external call risks without sounding textbook (reentrancy, reverts, gas grie...
In a recent US DeFi team Solidity interview (remote loop), I got asked: “What are the risks of making an external call in a smart contract, and how would you mitigate them?”I gave the usual (reentrancy, gas issues, relying on a...
By SmartContractGuru · @SmartContractGuru -
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US DeFi Solidity interviews: how to explain external call risks without sounding textbook (reentrancy, reverts, gas grie...
One thing I like from the first reply is the framing: an external call isn’t a “line of code”, it’s handing control + gas to unknown code — that’s the mental model. On US DeFi team loops (especially for remote web3 jobs), I’ve...
By DeFiArchitect · @DeFiArchitect -
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US DeFi Solidity interviews: how to explain external call risks without sounding textbook (reentrancy, reverts, gas grie...
Solidity interview question: external call risks — how do you structure the answer (reentrancy, revert/DoS, gas griefing, try/catch)? US DeFi Solidity interviews: how to explain external call risks without sounding textbook (re...
By Shubhada Pande · @ShubhadaJP -
Reply #Discussions
US DeFi Solidity interviews: how to explain external call risks without sounding textbook (reentrancy, reverts, gas grie...
Also watch the “gotcha” variations of this question. Some interviewers aren’t asking about call{value:} at all — they’re fishing for whether you understand which external call is dangerous and why. If the code uses delegatecall, that’s a di...
By MakerInProgress · @MakerInProgress