CBP Forks and Network Upgrades 2

Question 1

What distinguishes a User-Activated Soft Fork (UASF) from a Miner-Activated Soft Fork (MASF)?

Accepted Answer

UASF is enforced by full nodes regardless of miner support, while MASF relies on miners to signal readiness

Answer

UASF requires 95% miner signaling while MASF requires only 51%

Answer

UASF creates a new coin while MASF keeps the existing chain

Answer

UASF only applies to transaction rules while MASF applies to block rules

Question 2

During the 2017 Bitcoin scaling debate, BIP 148 was a proposal for which type of activation?

Accepted Answer

A UASF to force SegWit activation by August 1, 2017

Answer

A hard fork to increase block size to 2MB

Answer

A miner-activated soft fork for SegWit2x

Answer

A soft fork to reduce the block time to 5 minutes

Question 3

What is a 'velvet fork' in the context of Bitcoin protocol upgrades?

Accepted Answer

An upgrade that is backward compatible and does not split the chain even if not all nodes upgrade

Answer

A fork that requires all nodes to upgrade simultaneously

Answer

A type of hard fork that preserves both chains permanently

Answer

A miner-initiated fork that temporarily splits the network

Question 4

What happened to the Bitcoin XT fork proposal in 2015?

Accepted Answer

It was abandoned after failing to gain sufficient node and miner adoption

Answer

It successfully activated and became the dominant Bitcoin chain

Answer

It merged back into Bitcoin Core after six months

Answer

It became Bitcoin Cash after a replay attack

Question 5

In a soft fork, which group's behavior change is strictly required to enforce the new rules?

Accepted Answer

A majority of miners must enforce the new stricter rules

Answer

All end users must update their wallets

Answer

All light clients must update their SPV software

Answer

Only developers need to release updated code

Question 6

What is 'chain death spiral' risk associated with hard forks?

Accepted Answer

A minority chain losing so much hash rate that block times become excessively long, making it unusable

Answer

A scenario where high transaction fees cause users to abandon the chain

Answer

When a fork causes a replay attack that empties all wallets

Answer

When developer disagreements prevent any future protocol upgrades

Question 7

Which Bitcoin Improvement Proposal introduced the concept of version bits to coordinate multiple soft fork activations simultaneously?

Accepted Answer

BIP 9

Answer

BIP 16

Answer

BIP 91

Answer

BIP 141