Bitcoin Mining, Forking, and Scalability Solutions BDC Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   What happens to the mining difficulty if the total hash rate of the Bitcoin network increases significantly?

   • AThe difficulty decreases to encourage more miners to join
   • BThe difficulty remains the same because it is fixed
   • CThe block time becomes shorter permanently
   • DThe difficulty increases at the next adjustment to keep block times near 10 minutes
   Reveal Solution Discussion Select an answer first
2. 22application · medium

   A developer is building a wallet that creates transactions with multiple inputs and wants to avoid the risk of transaction malleability. Which Bitcoin protocol feature directly addresses this issue?

   • AIncreasing the block size to 8 MB reduces the chance of malleability.
   • BUsing a mining pool to confirm transactions faster.
   • CSegregated Witness (SegWit) removes signature data from the transaction ID calculation.
   • DImplementing a hard fork to change the hashing algorithm.
   Reveal Solution Discussion Select an answer first
4. 23application · medium

   A developer proposes a protocol change that makes some previously valid transactions invalid, but all new blocks are still accepted by old nodes. Which type of fork is this, and what is a real-world example?

   • ASoft fork; SegWit is an example because old nodes still accept blocks containing SegWit transactions.
   • BSoft fork; Bitcoin Cash is an example because it increased the block size.
   • CHard fork; SegWit is an example because it changed the transaction format.
   • DHard fork; Bitcoin Cash is an example because it changed the block size limit.
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   Which of the following is a notable hard fork of Bitcoin?

   • ATaproot
   • BLightning Network
   • CSegWit
   • DBitcoin Cash
   Reveal Solution Discussion Select an answer first
6. 25application · medium

   A payment processor using Bitcoin is experiencing slow confirmations during peak hours. They need to increase transaction throughput without changing the base layer's block size. Which approach directly addresses this constraint?

   • AIncrease the block size limit to 32 MB through a hard fork.
   • BImplement the Lightning Network to enable off-chain transactions that settle on the Bitcoin blockchain.
   • CReduce the mining difficulty to allow faster block production.
   • DUse a sidechain that requires all transactions to be recorded on the main chain.
   Reveal Solution Discussion Select an answer first