Consensus and Scalability Innovations BDC Practice Questions (Page 10)

Questions 46–50

1. 46foundation · easy

   Which of the following is an example of a scalability approach that may reduce decentralization?

   • AImplementing sharding
   • BIncreasing the block size limit
   • CUsing a DAG structure
   • DUsing Layer 2 solutions
   Reveal Solution Discussion Select an answer first
2. 47foundation · easy

   Which of the following is a common technique used in cross-chain interoperability?

   • ASharding
   • BMining difficulty adjustment
   • CProof of Stake
   • DAtomic swaps
   Reveal Solution Discussion Select an answer first
4. 48application · medium

   A cryptocurrency exchange is evaluating Proof of Stake (PoS) versus Proof of Work (PoW) for a new blockchain. They want to reduce energy consumption and increase transaction throughput, but they are concerned about the 'nothing at stake' problem. What is the best way to mitigate this issue in a PoS system?

   • AUse a longer block time to reduce the chance of conflicts.
   • BSwitch to a DAG-based structure to avoid the problem entirely.
   • CRequire validators to lock up more tokens than the total supply.
   • DImplement slashing conditions that penalize validators who validate conflicting blocks.
   Reveal Solution Discussion Select an answer first
5. 49application · medium

   A social media platform is building a blockchain-based content reward system. They want high transaction throughput and low latency, but they are concerned about the energy consumption of Proof of Work. They are considering Delegated Proof of Stake (DPoS). What is a key trade-off they must accept?

   • AImmediate finality without any possibility of chain reorganization.
   • BA smaller set of block producers, which can lead to centralization of power.
   • CHigher energy consumption than PoW due to continuous voting.
   • DLower throughput than PoW because of the election process.
   Reveal Solution Discussion Select an answer first
6. 50foundation · easy

   What is the primary purpose of Layer 2 scaling solutions?

   • ATo create a new cryptocurrency
   • BTo replace the main blockchain with a faster one
   • CTo move some transaction processing off the main blockchain to reduce congestion
   • DTo increase the block size of the main blockchain
   Reveal Solution Discussion Select an answer first