ArtofBlockchain

Difficulty - Medium

Total Plays - 19

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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Vijay B
@xDhgFi3 • Dec 31, 2025

Dec 31, 2025
327

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...

Like 2 Replies 4
Sayali Bhandari
@SayaliB • Dec 30, 2025

Dec 30, 2025
2.2K

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
Aditi Rao
@aditi-rao • Dec 28, 2025

Dec 28, 2025
460

Clean code, but still rejected — what do juniors miss in take-home assignments?

I’m a junior developer and I keep running into the same problem. My take-home assignments usually work, the code is clean, but I still get rejected — often without any...

Like 3 Replies 4
Difficulty - Medium

Total Plays - 20

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 - 20

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.

Leaderboard
Difficulty - Medium

Total Plays - 17

Allowed Time - 10 sec

Best time - 3.845

Which function type cannot access msg.sender?

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#A

#B

#C

#D

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

Leaderboard
Difficulty - Medium

Total Plays - 12

Allowed Time - 10 sec

Best time - 1.012 sec

What breaks if virtual is omitted in multiple inheritance?

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#A

#B

#C

#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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Difficulty - Medium

Total Plays - 8

Allowed Time - 10 sec

Best time - 10

Which Solidity construct enforces compile-time immutability?

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#A

#B

#C

#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.

Leaderboard
Sayali Bhandari
@SayaliB • Dec 26, 2025

Dec 26, 2025
1.3K

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...

Like 7 Replies 5
Difficulty - Medium

Total Plays - 7

Allowed Time - 10 sec

Best time - 10

What default value does an uninitialized storage pointer hold?

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#A

#B

#C

#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.

Leaderboard
Difficulty - Medium

Total Plays - 7

Allowed Time - 10 sec

Best time - 10

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.

Leaderboard
Difficulty - Medium

Total Plays - 5

Allowed Time - 10 sec

Best time - 6.667 sec

What happens if a modifier reverts after _ execution?

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#A

#B

#C

#D

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.

Leaderboard
Difficulty - Medium

Total Plays - 7

Allowed Time - 10 sec

Best time - 3.892

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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Shehnaz Hussain
@shehnaz • Dec 23, 2025

Dec 23, 2025
1.9K

How to switch to blockchain testing? Key skills, tools, and career scope?

I'm trying to move into blockchain QA but not sure where to begin.I’ve spent the last 5 years working in manual software testing, and recently, I’m planning to switch to...

Like 6 Replies 6
FintechLee
@FintechLee • Dec 21, 2025

Dec 21, 2025
1.8K

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...

Like 2 Replies 2
Merrythetechie
@Merrythetechie • Dec 20, 2025

Dec 20, 2025
332

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...

Like 2 Replies 2
Sebastian Luna
@XrjRjAi • Dec 19, 2025

Dec 19, 2025
1.9K

20+ years in finance but not getting interviews in Web3 — what am I missing?

Hey everyone,I need some honest advice because I’m very frustrated now. I’ve been working in finance for more than 20 years. This includes accounting, bookkeeping, analysis, managing teams, controlling —...

Like 9 Replies 3
Alex Chen
@AlexC • Dec 18, 2025

Dec 18, 2025
376

As a blockchain QA, how do you report critical bugs without damaging your relationship with developers?

I work as a QA in a blockchain project, and I’m struggling with how to report critical bugs without creating friction with developers.In Web3, even small issues can have serious...

Like 4 Replies 6
ChainPenLilly
@ChainPenLilly • Dec 17, 2025

Dec 17, 2025
1.2K

I work in social impact — does learning blockchain actually open ESG or Web3 career paths?

Hi everyone,I work as a social worker, mostly on social impact programs. One challenge we constantly face is traceability — tracking how funds, resources, and outcomes actually move on the...

Like 8 Replies 3