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Blockchain CBSA Exam - Topic 4 Question 96 Discussion

Actual exam question for Blockchain's CBSA exam

Question #: 96
Topic #: 4

[All CBSA Questions]

What are two challenges with using a Proof of Work algorithm? (Select two.)

AMining pools not allowed

BDifficulty rate goes done every year.

CExpensive

DPower Intensive

Show Suggested Answer

Suggested Answer: C, D

by Ciara at Nov 24, 2025, 08:48 PM

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Lenna

2 months ago

I wonder if people realize how unsustainable it is.

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Cassandra

2 months ago

I chose C and D as well. The expenses just keep rising.

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France

2 months ago

Definitely! Power consumption is a huge environmental concern too.

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Audrie

2 months ago

I feel like the costs really limit participation.

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Svetlana

3 months ago

Agreed! Mining is super expensive and uses so much power.

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Wilda

3 months ago

I think C and D are the biggest issues.

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Ceola

3 months ago

Yeah, the environmental impact is a huge issue too.

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Shawna

3 months ago

Mining pools are actually allowed, right?

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Lili

4 months ago

Totally agree, power intensive for sure.

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Enola

4 months ago

It's super expensive to mine!

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Teri

4 months ago

C) Expensive? More like "Wallet-Emptying"! And D) Power Intensive? I think my entire neighborhood could power a small country.

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Julieta

4 months ago

I'm just glad I don't have to mine for Bitcoins in my backyard. That would be a real workout!

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James

4 months ago

Proof of Work is like running a marathon with a sledgehammer - it's tough and energy-draining!

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Rhea

5 months ago

C) Expensive and D) Power Intensive are the correct answers.

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Johnna

5 months ago

I feel like mining pools being allowed is a non-issue, but I can't remember if that's related to the challenges of Proof of Work.

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Gladys

5 months ago

I practiced a question like this before, and I think the difficulty rate doesn't actually go down every year. That might be a misconception.

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Shawna

5 months ago

I'm not entirely sure, but I think the cost of mining equipment could be a challenge too? It seems like it gets more expensive over time.

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Billy

5 months ago

I think one challenge is definitely the power intensity. I remember reading about how much energy mining consumes.

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Sherita

5 months ago

Easy peasy! The power consumption and cost of Proof of Work are definitely the two main challenges here. I'll confidently select C and D.

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Rolande

6 months ago

I'm a little confused on this one. I know Proof of Work has some drawbacks, but I'm not sure if mining pools being disallowed is actually one of them. I'll have to review my notes before answering this.

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Elina

6 months ago

Okay, let's see here. I think the power usage and expense of mining are the two biggest issues with Proof of Work. The difficulty rate changing doesn't seem like a major challenge to me. I'll mark C and D.

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Joanna

6 months ago

Nailed it! C) and D) are the way to go. Now, if only I could mine some crypto while I sleep...

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Tatum

6 months ago

Wait, the difficulty rate goes down every year? That sounds off.

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Levi

7 months ago

Hmm, I'm not totally sure about this one. I know Proof of Work is energy-intensive, but I'm not sure if the difficulty rate going down is actually a challenge. I'll have to think this through a bit more.

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Tyisha

7 months ago

This one seems pretty straightforward. I'd go with C and D - the power usage and cost of mining are definitely challenges with Proof of Work.

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Chau

1 month ago

We need better alternatives for mining.

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Meaghan

1 month ago

Yeah, it's not sustainable long-term.

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Lynette

1 month ago

And the power consumption is just crazy!

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Cassi

2 months ago

Totally! The costs are insane.

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Carline

6 months ago

I agree, C and D make the most sense.

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