Blockchain Exam CBDE Topic 4 Question 85 Discussion

Actual exam question for Blockchain's BTA Certified Blockchain Developer - Ethereum exam

Question #: 85
Topic #: 4

[All BTA Certified Blockchain Developer - Ethereum Questions]

To generate a random number:

Ait's good to use the block timestamp, as this is always different.

Bit's good to use the block hash as this is clearly always very different.

Cit's good to use the RANDAO smart contract.

Dit's not possible to have a random number in a deterministic environment such as the Ethereum blockchain.

Show Suggested Answer

Suggested Answer: C

by Ammie at Apr 09, 2024, 06:18 AM

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Luisa

7 days ago

Hah, good point, Justine! I think that's the problem with a lot of these options - they might seem random on the surface, but there could be ways to game the system. I'm not sure there's a perfect solution here.

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Justine

9 days ago

Personally, I'm leaning towards option B. The block hash is always different, so it seems like a good source of randomness to me. *chuckles* Although I guess if someone can predict the block hash, it wouldn't be so random, would it?

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Tommy

10 days ago

Yeah, Herman's got a point. I think the RANDAO contract is a pretty good solution. It's been used quite a bit in the Ethereum ecosystem, so it must be doing something right.

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Herman

11 days ago

I'm not so sure about that, Sherill. What about option C, the RANDAO smart contract? I've heard that can be a pretty reliable way to generate random numbers on the blockchain.

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Sherill

13 days ago

I agree with you, Gary. I'm not sure there's an easy answer here. But I think option D might be the most accurate - it's probably not possible to have a completely random number on the Ethereum blockchain.

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Gary

14 days ago

Hmm, this is an interesting question. I'm not sure how I feel about it, to be honest. Generating a truly random number in a deterministic environment like the Ethereum blockchain does seem like a bit of a challenge.

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