Proof of Stake (PoS) and Derivative Protocols BDC Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   In Proof of Stake networks, what is 'slashing'?

   • AA method of increasing a validator's chance of being selected
   • BA process of splitting a validator's stake among multiple addresses
   • CA reward given to validators for proposing blocks
   • DA penalty that destroys a portion of a validator's staked funds for misbehavior
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A developer is explaining to a client why a Proof of Stake blockchain can achieve finality faster than a Proof of Work blockchain. Which statement is the most accurate?

   • APoS validators are known in advance and can be cryptographically penalized for voting on conflicting blocks, allowing the protocol to finalize blocks without waiting for multiple confirmations.
   • BPoS networks have a smaller block size, which reduces propagation time.
   • CPoS uses more powerful hardware, so blocks are produced and confirmed faster.
   • DPoS validators do not need to download the entire blockchain, so they can finalize blocks instantly.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   How does Proof of Stake (PoS) achieve distributed consensus without the energy-intensive mining of Proof of Work (PoW)?

   • ABy using a lottery based on the hash of the previous block
   • BBy eliminating the need for a distributed ledger
   • CBy using a central authority to validate all transactions
   • DBy requiring validators to lock up cryptocurrency as collateral instead of performing computational work
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   What is a common method for resolving hard forks in PoS networks?

   • AThe longest chain with the most accumulated work is automatically chosen
   • BStakeholders vote on which fork to support, and the network follows the majority stake
   • CA central authority decides which fork is valid
   • DThe fork with the most transactions is automatically selected
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A validator in a Proof of Stake network is found to have signed two conflicting blocks at the same height. According to typical PoS slashing rules, what is the most likely consequence?

   • AThe validator's rewards are paused for one epoch
   • BThe validator receives a warning but no financial penalty
   • CThe validator's identity is revealed to the public but no funds are lost
   • DA portion of the validator's staked tokens is forfeited and the validator may be ejected
   Reveal Solution Discussion Select an answer first