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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.)

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Suggested Answer: C, D

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

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Lenna
9 days ago
I wonder if people realize how unsustainable it is.
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Cassandra
14 days ago
I chose C and D as well. The expenses just keep rising.
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France
20 days ago
Definitely! Power consumption is a huge environmental concern too.
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Audrie
25 days ago
I feel like the costs really limit participation.
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Svetlana
30 days ago
Agreed! Mining is super expensive and uses so much power.
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Wilda
1 month ago
I think C and D are the biggest issues.
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Ceola
1 month ago
Yeah, the environmental impact is a huge issue too.
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Shawna
2 months ago
Mining pools are actually allowed, right?
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Lili
2 months ago
Totally agree, power intensive for sure.
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Enola
2 months ago
It's super expensive to mine!
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Teri
2 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
3 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
3 months ago
Proof of Work is like running a marathon with a sledgehammer - it's tough and energy-draining!
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Rhea
3 months ago
C) Expensive and D) Power Intensive are the correct answers.
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Johnna
3 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
3 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
4 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
4 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
4 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
4 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
4 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
5 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
5 months ago
Wait, the difficulty rate goes down every year? That sounds off.
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Levi
5 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
5 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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Cassi
4 days ago
Totally! The costs are insane.
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Carline
4 months ago
I agree, C and D make the most sense.
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