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AshishS

@Web3SecurityPro • 1mo

What skills actually matter for UI/UX roles in NFT platforms and decentralized identity?

Looking to get into UI/UX design for blockchain and metaverse projects—what’s the real deal with hiring right now?For those already working on NFT platforms, virtual asset tools, or decentralized ID...

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Difficulty - Medium

Total Plays - 15

Allowed Time - 10 sec

Best time - 3.590 sec

Which keyword prevents further inheritance of a contract?

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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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Difficulty - Medium

Total Plays - 13

Allowed Time - 10 sec

Best time - 3.845 sec

Which function type cannot access msg.sender?

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Explanation:
pure functions cannot read blockchain context such as msg.sender or block.timestamp. They are restricted to computation based solely on input parameters and local variables

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Difficulty - Medium

Total Plays - 8

Allowed Time - 10 sec

Best time - 3.516 sec

What breaks if virtual is omitted in multiple inheritance?

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#D

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 • 1mo

Why Blockchain Job Descriptions Are So Vague — And What Hiring Teams Actually Mean

If you’ve ever read a blockchain job description and felt unsure what the role actually involves, you’re not alone.Across smart contract, protocol, infra, and security roles, job descriptions often sound...

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Difficulty - Medium

Total Plays - 5

Allowed Time - 10 sec

Best time - 10 sec

Which Solidity construct enforces compile-time immutability?

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#A

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#D

Explanation:
constant variables are evaluated at compile time and embedded directly into contract bytecode. This guarantees immutability and avoids any runtime storage access or gas cost.

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SheniGun

@bXUI62V • 1mo

Guidance on how to land a good job in web3

I started working as a Blockchain Developer in 2021 at a small service based indian startup. It was a remote job and I worked there for around 2.6 years. And...

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AlexDeveloper

@Alexdeveloper • 1mo

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...

4

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Sayali Bhandari

@SayaliB • 1mo

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...

7

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Difficulty - Medium

Total Plays - 4

Allowed Time - 10 sec

Best time - 10 sec

What default value does an uninitialized storage pointer hold?

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#D

Explanation:
An uninitialized storage pointer defaults to storage slot zero. This can overwrite critical state variables such as ownership or balances, making it a high-severity audit issue.

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Difficulty - Medium

Total Plays - 4

Allowed Time - 10 sec

Best time - 10 sec

Which visibility allows internal calls but blocks inheritance override?

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#A

#B

#C

#D

Explanation:
private functions and variables are accessible only within the defining contract. They cannot be called or overridden by child contracts, which blocks inheritance-based modification entirely.

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Difficulty - Medium

Total Plays - 3

Allowed Time - 10 sec

Best time - 10 sec

What happens if a modifier reverts after _ execution?

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Explanation:
If a modifier reverts after the _ placeholder executes, the entire transaction is reverted. All state changes made inside the function and modifier are rolled back due to Ethereum’s atomic execution model.

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Application deadline: 1 week

Product Lead, Solana

Alchemy • FULL_TIME • NA

Job description

Alchemy builds developer infrastructure used to operate blockchain applications at scale. The Product Lead, Solana role owns the direction and execution of Alchemy’s Solana product offering, which supports high-throughput, low-latency blockchain workloads and handles billions of API requests daily. This position is responsible for defining the product roadmap, managing a...

Details Login to apply
Application deadline: 1 week

A

Senior Engineering Manager, Infrastructure & Platform

Alchemy • FULL_TIME • NA

Job description

Alchemy builds developer infrastructure used to create, scale, and operate blockchain-based applications and onchain products. The Senior Engineering Manager, Infrastructure & Platform role focuses on leading multiple backend-focused teams responsible for core cloud infrastructure, platform services, data engineering, and internal tooling. This position owns technical execution and long-term platform strategy...

Details Login to apply
Difficulty - Medium

Total Plays - 5

Allowed Time - 10 sec

Best time - 3.892 sec

Which Solidity keyword prevents state variable shadowing?

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#A

#B

#C

#D

Explanation:
The override keyword forces explicit acknowledgment when a derived contract replaces a parent variable or function. This prevents accidental state variable shadowing in inheritance hierarchies, which can otherwise lead to subtle storage corruption bugs.

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