Blockchain CBSP Exam - Topic 5 Question 120 Discussion

Actual exam question for Blockchain's CBSP exam

Question #: 120
Topic #: 5

[All CBSP Questions]

Which of the following types of attacks are disincentivized in the long-term on blockchains like Bitcoin?

ATimewarp

BDouble-Spend

CSelfish Mining

DSPV Mining

Show Suggested Answer

Suggested Answer: D

by Ruby at Nov 22, 2025, 02:37 PM

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Casie

4 days ago

D) SPV Mining? Not really an attack, more of a method.

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Viki

9 days ago

C) Selfish Mining could be a concern, but it’s less impactful long-term.

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Leigha

15 days ago

Agreed! Double-Spend undermines trust.

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Linette

20 days ago

I think B) Double-Spend is the right answer. It's heavily disincentivized.

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Isaac

25 days ago

Double-Spend is the classic attack, no doubt about it!

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Tanja

1 month ago

Totally agree, Selfish Mining is a big no-no in the long run.

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Frank

1 month ago

Wait, are we sure Timewarp is really a problem?

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Ethan

1 month ago

I thought SPV Mining was a bigger issue?

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Chauncey

2 months ago

Double-Spend attacks are definitely disincentivized.

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Lizbeth

2 months ago

B) Double-Spend, for sure. Can't fool the blockchain, that's for sure.

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Cherry

2 months ago

Haha, I bet the answer is C) Selfish Mining. Miners gotta mine, am I right?

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Melodie

2 months ago

A) Timewarp? Really? That's so 2010. Blockchains have evolved, my dude.

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Michael

3 months ago

D) SPV Mining is the way to go. Gotta love those simplified payment verifications!

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Clare

3 months ago

I think B) Double-Spend is the right answer. Blockchains are designed to prevent this kind of attack.

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Norah

3 months ago

The correct answer is C) Selfish Mining. Blockchains like Bitcoin disincentivize this type of attack in the long run.

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Paola

3 months ago

Timewarp sounds familiar, but I can't remember its specifics. I feel like it might be less relevant in the long run compared to the others.

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Willard

3 months ago

I practiced a question about selfish mining before, and I recall it being a significant threat, but Bitcoin's design helps mitigate it over time.

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Leota

4 months ago

Timewarp attacks - that's a good one to consider. I think the blockchain's consensus mechanism makes those less viable over time.

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Arlette

4 months ago

I'm a bit unsure about SPV mining. I'll have to review how that works in the context of blockchain incentives.

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Monroe

4 months ago

I'm pretty confident that selfish mining is disincentivized in the long run. The network penalizes that kind of behavior.

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Barrett

4 months ago

I'm not entirely sure about SPV mining, but I remember it being less of a concern compared to selfish mining and double-spending.

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Fairy

5 months ago

I think double-spending is definitely disincentivized because of how transactions are confirmed on the blockchain.

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Rikki

5 months ago

A) Timewarp seems tricky, but it’s not as common.

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Annelle

5 months ago

Okay, let me see. I know double-spend attacks are disincentivized, but what about the other options?

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Daniel

5 months ago

Hmm, this is a tricky one. I'll need to think through the long-term incentives on the blockchain network.

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Merilyn

4 months ago

Yeah, but it's heavily disincentivized.

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Dyan

4 months ago

I think double-spend is a big issue.

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