Which term is defined as the supermajority of validators needed to finalize a decision with high probability?

• A. Block
• B. Commit
• C. Finality threshold
• D. Gas price

Answer: (C)

Finality threshold is the supermajority of validators needed to finalize a decision with high probability. In consensus systems, once enough validators—often around two-thirds—agree to a block and that threshold is reached, the network treats the block as final and highly likely irreversible. This threshold balances safety (resisting up to one-third faulty or malicious actors) with progress, ensuring decisions aren’t overturned while the network continues to operate smoothly. The other terms don’t capture this rule: a block is just a unit of data, commit is not the specific rule for finalizing decisions, and gas price relates to transaction fees, not finality.