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Pasted by Anonymous, 2016-11-28 05:19:30 GMT
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  1. Which of the following is not a part of the Bitcoin architecture?  
  3. Select one:  
  4. a. Centralized points of trust  
  5. b. The blockchain  
  6. c. P2P network  
  7. d. Public ledger  
  9. When was the Genesis Block mined?  
  11. Select one:  
  12. a. 2009  
  13. b. 2010  
  14. c. 2011  
  15. d. 2012  
  17. Which cryptographic hash functions are used in Bitcoin? Choose all that apply.  
  19. Select one or more:  
  20. a. MD5  
  21. b. RIPEMD-160  
  22. c. SHA-256  
  23. d. SHA-512  
  25. Which of the following is true about cryptographic hash functions? Choose all that apply.  
  27. Select one or more:  
  28. a. It is easy to compute a predetermined hash value  
  29. b. It is extremely unlikely to find two different messages with the same hash  
  30. c. It is extremely unlikely to generate a message that has a given hash  
  31. d. It is easy to calculate whether a hash responds to a specific message  
  33. What does ECDSA stand for?  
  35. Select one:  
  36. a. Electronic Central Digital Signature Authority  
  37. b. Elliptic Curve Digital Signature Algorithm  
  38. c. Ericsson Content Delivery System Architecture  
  39. d. European Center for Digital Safety Association  
  41. What is the purpose of cryptographic hash functions in Bitcoin? Choose all that apply.  
  43. Select one or more:  
  44. a. They provide non-repudiation  
  45. b. They provide confidentiality  
  46. c. They provide data integrity verification  
  47. d. They are used in Proof-of-Work (PoW)  
  49. What is the use of Public Key Cryptography in Bitcoin?  
  51. Select one:  
  52. a. To encrypt transactions between users  
  53. b. To produce Bitcoin addresses  
  54. c. To allow for transaction integrity verification  
  55. d. To implement digital signing of transactions  
  57. What is the meaning of a “transaction” as used in Bitcoin? Choose all that apply.  
  59. Select one or more:  
  60. a. A digital message in the system  
  61. b. Transfer of money as an asset through the blockchain  
  62. c. A means of enabling secure channels between Bitcoin participants  
  63. d. Transfer of ownership of bitcoins as a unit of account  
  65. What is the correct formula for generating the digital signature S of a message M used in Bitcoin?  
  67. Select one:  
  68. a. S = encrypt(sha256(M), Kpub)  
  69. b. S = encrypt(M, Kpub)  
  70. c. S = encrypt(sha256(M), Kpriv)  
  71. d. S = encrypt(M, Kpriv)  
  73. Where are private keys located?  
  75. Select one:  
  76. a. In a wallet  
  77. b. In a block  
  78. c. Attached to a bitcoin  
  79. d. In a transaction  
  81. Why is the relationship of private and public keys asymmetric?  
  83. Select one:  
  84. a. Because the public key can be derived from the private key, just as easily as the opposite  
  85. b. Because the public key can be derived from the private key, while the opposite is computationally infeasible  
  86. c. Because the private key can be derived from the public, while the opposite is highly improbable  
  87. d. Because the private key is always larger than the public key  
  89. If you have 256 mBTC in a single address unspent (assuming 1 unspent output) in your account, and paid out 10 mBTC, how many inputs and outputs will be created for this transaction?  
  91. Select one:  
  92. a. One input and one output  
  93. b. One input and two outputs  
  94. c. Two inputs and one output  
  95. d. One output only  
  97. How many new blocks are created per day, on average?  
  99. Select one:  
  100. a. 14  
  101. b. 144  
  102. c. 1,440  
  103. d. 2,000  
  105. What is the role of digital signatures in Bitcoin?  
  107. Select one:  
  108. a. To associate bitcoins with their owners  
  109. b. To provide transaction verification  
  110. c. To provide decentralized trust in the system  
  111. d. All of the above  
  113. Which of the following is true for Bitcoin transactions? Choose all that apply  
  115. Select one or more:  
  116. a. All transactions must have inputs  
  117. b. All transactions must have outputs  
  118. c. Except for coinbase transactions, all inputs must equal the outputs (minus miner fees)  
  119. d. Except for coinbase transactions, inputs may be smaller than the outputs  
  121. What happens with the number of new blocks per day every 4 years (on average)?  
  123. Select one:  
  124. a. It increases (i.e. more blocks are being created)  
  125. b. It will remain the same until (roughly) 2140, after which no more new blocks will be created  
  126. c. It remains the same (i.e. the average number of new blocks per day never changes)  
  127. d. It decreases (i.e. fewer blocks are being created)  
  129. What happens with the number of new bitcoins generated per day every 4 years, on average?  
  131. Select one:  
  132. a. It remains the same  
  133. b. It remains the same until (roughly) 2140, after which it goes to zero  
  134. c. It doubles every four years  
  135. d. It halves every four years, until it reaches zero  
  137. Which is the best option when choosing mining hardware?  
  139. Select one:  
  140. a. GPUs (Graphics Processing Units)  
  141. b. CPUs (Central Processing Units)  
  142. c. FPGA (Field Programmable Gate Arrays)  
  143. d. ASICs (Application-Specific Integrated Circuits)  
  145. Why would one prefer to do solo mining over pool mining?  
  147. Select one:  
  148. a. Solo mining is a more efficient way of mining than pool mining  
  149. b. Pool mining is inefficient due to multiple miners  
  150. c. One would get the full amount of the reward when they find a block  
  151. d. Transaction fees are not included when doing solo mining  
  153. Which of the following are mining distribution schemes? Choose all that apply.  
  155. Select one or more:  
  156. a. Capped Double Geodesic Method (CDGM)  
  157. b. Pay on Share (POS)  
  158. c. Pay Per Share (PPS)  
  159. d. Pay Per Last Number of Shares (PPLNS)  
Written by Xan Manning, 2010.