Home | ArtOfBlockChain

Difficulty - Medium

Total Plays - 16

Allowed Time - 10 sec

Best time - 3.590

Which keyword prevents further inheritance of a contract?

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#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.

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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...

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Difficulty - Medium

Total Plays - 11

Allowed Time - 10 sec

Best time - 3.307

Why should developers avoid using tx.origin for authentication?

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#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.

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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...

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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...

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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...

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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...

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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 • 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...

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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.

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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.

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Difficulty - Medium

Total Plays - 9

Allowed Time - 10 sec

Best time - 1.518

Which bug class often goes unnoticed during audits?

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#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.

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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...

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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...

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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...

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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

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Shubhada Pande
@ShubhadaJP • Sep 13, 2025

Sep 13, 2025

637

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...

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Shubhada Pande
@ShubhadaJP • Dec 18, 2025

Dec 18, 2025

1.4K

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...

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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.

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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...

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