Bitcoin Mining, Forking, and Scalability Solutions BDC Practice Questions (Page 6)

Questions 26–30

1. 26foundation · easy

   How does the Bitcoin network adjust mining difficulty to maintain a consistent block time?

   • AIt recalculates the target every 2016 blocks based on the time taken to mine the previous 2016 blocks
   • BIt uses a fixed difficulty that never changes
   • CIt adjusts the block reward to influence miner participation
   • DIt changes the difficulty after every block based on the current hash rate
   Reveal Solution Discussion Select an answer first
2. 27foundation · easy

   What is a major environmental consideration of Bitcoin mining?

   • AThe emission of greenhouse gases from mining equipment directly
   • BThe production of electronic waste from discarded mining hardware
   • CThe use of rare earth metals in mining hardware
   • DHigh electricity consumption due to the computational work required by Proof of Work
   Reveal Solution Discussion Select an answer first
4. 28expert · hard

   A blockchain architect is comparing sidechains and the Lightning Network for a Bitcoin-based application that requires both high throughput and final settlement on the main chain. Which approach is more appropriate for this requirement?

   • ALightning Network, because it provides the same throughput as sidechains but with simpler infrastructure.
   • BSidechains, because they can process many transactions independently and periodically anchor to the main chain.
   • CLightning Network, because it settles every transaction on the main chain.
   • DSidechains, because they do not require any interaction with the main chain.
   Reveal Solution Discussion Select an answer first
5. 29foundation · easy

   What is the primary scalability limitation of the Bitcoin network?

   • AThe 1 MB block size limit restricts the number of transactions processed per block
   • BThe 10-minute block time is too short to process all transactions
   • CThe transaction fee is too high for most users
   • DThe difficulty adjustment makes mining too slow
   Reveal Solution Discussion Select an answer first
6. 30application · medium

   A blockchain analytics firm is categorizing historical Bitcoin protocol changes. They need to distinguish between changes that created a permanent chain split and those that were backward compatible. Which pair correctly matches a fork type with a real Bitcoin example?

   • ASoft fork – Bitcoin Cash; Soft fork – SegWit
   • BHard fork – SegWit; Soft fork – Bitcoin Cash
   • CHard fork – SegWit; Hard fork – Bitcoin Cash
   • DSoft fork – SegWit; Hard fork – Bitcoin Cash
   Reveal Solution Discussion Select an answer first