ArtofBlockchain

Difficulty - Medium

Total Plays - 18

Allowed Time - 10 sec

Best time - 1.444

Which data location persists across transactions?

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#A

#B

#C

#D

Explanation:
Storage persists on-chain across transactions and blocks. Memory and calldata are temporary and cleared after execution completes.

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Sayali Bhandari
@SayaliB • Dec 30, 2025

Dec 30, 2025

2.1K

Stuck Between AI and Blockchain — Feels Like I Might Choose Wrong

I’m at a confusing point in my career and could use honest input from people who’ve been in the space longer.I’ve spent time learning blockchain basics and building small things,...

Like 5 Replies 4
Difficulty - Medium

Total Plays - 18

Allowed Time - 10 sec

Best time - 4.491

What happens if a public variable name conflicts with a function name?

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#A

#B

#C

#D

Explanation:
Public variables automatically generate getter functions. If a function shares the same name, the compiler prioritizes the variable-generated getter, shadowing the function definition.

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Difficulty - Medium

Total Plays - 18

Allowed Time - 10 sec

Best time - 3.013 sec

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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AlexDeveloper
@Alexdeveloper • Mar 4, 2026

Mar 4, 2026

3.2K

I blank out in Solidity interviews — how do you prepare for code review and optimization tasks?

I’m preparing for junior smart contract developer roles, and I’m consistently struggling with the Solidity code-review part of the interview.Whenever an interviewer drops a simple staking or ERC20 contract and...

Like 5 Replies 6
AuditWardenRashid
@AuditWarden • Apr 10, 2026

Apr 10, 2026

1.5K

How do real smart contract audits work in practice? What do auditors check before Slither, Mythril, Foundry fuzzing, or Echidna?

I’m trying to understand how real smart contract audits actually work once a team hands over production Solidity code for review. A lot of beginner content still makes audits sound...

Like 5 Replies 6
MakerInProgress
@MakerInProgress • Dec 14, 2025

Dec 14, 2025

697

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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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

570

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
@CareerSensei • Nov 26, 2025

Nov 26, 2025

538

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
@SolidityJatin • Nov 17, 2025

Nov 17, 2025

616

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

274

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?

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#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?

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#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...

Like 5 Replies 3
Sheza Henry
@ChainVisionary • Nov 5, 2025

Nov 5, 2025

552

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 • Oct 28, 2025

Oct 28, 2025

393

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?

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#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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