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Shubhada Pande
@ShubhadaJP • Jan 3, 2026

Jan 3, 2026

194

Smart Contract Fundamentals in Blockchain: EVM Basics, Solidity Concepts, Tooling & Core Mental Models

Strong smart contract engineers are not defined by how fast they jump into DeFi or audits — they are defined by how well they understand first principles.This hub exists to...

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abushaker jamil
@hRZ80yi • Jan 3, 2026

Jan 3, 2026

209

Looking for Guidance in My Blockchain Journey --- How Do I Get My First Full-Time Blockchain Developer Role?

I’ve been learning blockchain for about 1.5 years, and it has become something I’m truly passionate about. Even though I don’t come from a traditional tech background. I completed a...

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Vijay B
@xDhgFi3 • Dec 31, 2025

Dec 31, 2025

145

How would you approach breaking into protocol development as a final-year Solidity dev?

Hi everyone,I’m a final-year student and have been involved in Web3 since 2021. I spent close to two years interning with startups and am comfortable with Solidity (writing, debugging, and...

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Difficulty - Medium

Total Plays - 9

Allowed Time - 10 sec

Best time - 1.012 sec

What breaks if virtual is omitted in multiple inheritance?

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Explanation:
Without the virtual keyword, a function cannot be overridden in derived contracts. This breaks the override chain and prevents proper polymorphic behavior in multiple inheritance scenarios.

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Shubhada Pande
@ShubhadaJP • Dec 23, 2025

Dec 23, 2025

117

Advanced EVM Concepts & Internals

This sub-cluster captures the transition point from mid-level to senior engineering.Senior engineers are not expected to write opcodes, but they are expected to understand:how Solidity abstractions map to the EVMwhere...

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FintechLee
@FintechLee • Dec 21, 2025

Dec 21, 2025

1.7K

Rust vs C++ for Blockchain Careers: Which One Actually Helps Long-Term Hiring and Growth?

I’m trying to make a long-term decision between Rust and C++ for blockchain development, and I’m struggling because most advice online feels too theoretical.My goal isn’t just to “learn a...

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Merrythetechie
@Merrythetechie • Dec 20, 2025

Dec 20, 2025

130

Recruiters keep asking why I’ve done so many contract roles in Web3 — is that a problem?

Most of my Web3 experience so far has been through contract or freelance roles. It wasn’t planned that way — those were just the opportunities I could get at the...

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Shubhada Pande
@ShubhadaJP • Dec 20, 2025

Dec 20, 2025

161

Role-Specific Hiring Playbooks

Different Web3 roles require different evaluation signals.This hub organizes hiring expectations and interview signals by role — helping teams avoid using one-size-fits-all criteria.Smart Contract & Protocol RolesSmart contract developer expectations👉...

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Difficulty - Medium

Total Plays - 11

Allowed Time - 10 sec

Best time - 1.974

Why can abi.encodePacked cause issues?

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Explanation:
encodePacked removes padding, which can produce identical byte sequences for different inputs. When combined with hashing, this may cause collisions. Using abi.encode is safer for multi-field data.

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Shubhada Pande
@ShubhadaJP • Dec 9, 2025

Dec 9, 2025

152

A Clear Framework for Debugging Solidity Errors That Keep Reappearing in Interviews

Disclaimer: This guide covers debugging patterns commonly evaluated in Solidity interviews and early-career smart contract roles. It is not a complete security audit methodology. Different teams and advanced audit firms...

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Mahesh S
@f6DpcOE • Dec 8, 2025

Dec 8, 2025

3.3K

Where can a B.Tech graduate find good blockchain training or internship opportunities today?

Hi,Are there any reputable blockchain training institutes offering courses — especially including Solana — for a B.Tech graduate?He already has a good understanding of blockchain, DeFi, and smart contracts, but...

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John Mathew
@BABXSUw • Dec 7, 2025

Dec 7, 2025

1.3K

Is a compliance certification enough for a global Web3 legal career, or do I need a specialized LLM too?

I’m trying to pivot into global blockchain compliance after five years in international law, but I’m stuck between two paths — should I double down on certifications, or invest in...

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Difficulty - Medium

Total Plays - 6

Allowed Time - 10 sec

Best time - 10

What does “state shadowing” indicate in inheritance?

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Explanation:
State shadowing happens when a derived contract redeclares a state variable with the same name as a parent. This creates storage misalignment and unexpected slot overwrites. Auditors treat this as a major upgradeability and correctness risk.

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Difficulty - Medium

Total Plays - 5

Allowed Time - 10 sec

Best time - 3.026

Why do auditors flag “silent reverts”?

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Explanation:
Silent reverts hide failure reasons, making debugging and validation difficult. They also open the door for inconsistent execution paths

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Difficulty - Medium

Total Plays - 8

Allowed Time - 10 sec

Best time - 4.033

What happens if a constructor of a deployed contract reverts?

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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

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Difficulty - Medium

Total Plays - 6

Allowed Time - 10 sec

Best time - 10

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

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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.

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Difficulty - Medium

Total Plays - 5

Allowed Time - 10 sec

Best time - 4.975

1. What does EXTCODEHASH primarily help detect?

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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

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Difficulty - Medium

Total Plays - 8

Allowed Time - 10 sec

Best time - 5.082

What is the main security benefit of using immutable variables?

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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.

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Victor P
@TrG6JIR • Nov 23, 2025

Nov 23, 2025

325

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...

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Aditi R
@aGoKU4J • Nov 14, 2025

Nov 14, 2025

165

I’m in Product Ops and stuck between founders pushing for fast releases and QA warning about audits — how do you decide what to prioritise in Web3?

I’m in Product Ops for a Web3 team, and I keep running into the same challenge: founders want to ship fast to keep momentum, while QA and auditors warn that...

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