Cryptomining Concepts BBLC Practice Questions (Page 9)

Questions 41–45

1. 41foundation · easy

   What are the two primary sources of income for a miner in a Proof of Work blockchain?

   • AHardware subsidies and electricity rebates
   • BBlock rewards and transaction fees
   • CInterest on staked coins and network fees
   • DDonations from users and advertising revenue
   Reveal Solution Discussion Select an answer first
2. 42application · medium

   A cryptocurrency network has seen a sudden influx of new miners, causing the average block time to drop from 10 minutes to 8 minutes. The network's difficulty adjustment algorithm targets a 10-minute block time. What is the most likely immediate effect on existing miners?

   • ATheir mining software will automatically switch to a more efficient algorithm
   • BTheir electricity costs will drop because blocks are found faster
   • CTheir block rewards will increase to compensate for the shorter block time
   • DTheir effective hash rate will appear to increase, but profitability per hash will decrease after the next difficulty adjustment
   Reveal Solution Discussion Select an answer first
4. 43foundation · easy

   Why do miners include transactions with higher fees in their blocks?

   • ATo increase the total reward they earn from the block
   • BTo reduce the block size and save storage
   • CTo comply with network regulations
   • DTo speed up the network's block time
   Reveal Solution Discussion Select an answer first
5. 44application · medium

   A company is evaluating the environmental impact of its blockchain operations. They currently run a PoW network with GPU miners. The board wants to reduce energy consumption while maintaining a decentralized consensus mechanism. Which approach best meets the board's requirement?

   • AIncrease mining difficulty to reduce the number of miners
   • BUse a mining pool to centralize operations and reduce redundant work
   • CMigrate the network to a Proof of Stake consensus mechanism
   • DReplace GPUs with more energy-efficient ASICs
   Reveal Solution Discussion Select an answer first
6. 45expert · hard

   A blockchain project is choosing between PoW and PoS. The project values security, decentralization, and low energy consumption. They have a large community of token holders but limited initial capital for hardware. Which consensus mechanism should they choose, and what is the primary trade-off?

   • APoS, because it reduces energy consumption and allows token holders to participate, but it may lead to wealth concentration influencing consensus
   • BPoW, because it requires no initial capital for hardware, only electricity
   • CPoW, because it is more decentralized and secure, but it consumes significant energy
   • DPoS, because it is more secure against 51% attacks than PoW
   Reveal Solution Discussion Select an answer first