|
| 1 | +{ |
| 2 | + "title": "Quiz: Lesson 1", |
| 3 | + "questions": [ |
| 4 | + { |
| 5 | + "question": "In order to shut down or take over a blockchain you would have to: ", |
| 6 | + "options": [ |
| 7 | + { |
| 8 | + "answer": "Disconnect the master node" |
| 9 | + }, |
| 10 | + { |
| 11 | + "answer": "Initiate a 51% attack", |
| 12 | + "correct": true |
| 13 | + }, |
| 14 | + { |
| 15 | + "answer": "It’s not possible" |
| 16 | + } |
| 17 | + ] |
| 18 | + }, |
| 19 | + { |
| 20 | + "question": "A blockchain:", |
| 21 | + "options": [ |
| 22 | + { |
| 23 | + "answer": "Runs on a global network of nodes that is accessible to anyone" |
| 24 | + }, |
| 25 | + { |
| 26 | + "answer": "Runs on a global network of nodes with permissions needed to access it" |
| 27 | + }, |
| 28 | + { |
| 29 | + "answer": "Uses cryptography to secure existing data on the chain" |
| 30 | + }, |
| 31 | + { |
| 32 | + "answer": "A & C", |
| 33 | + "correct": true |
| 34 | + }, |
| 35 | + { |
| 36 | + "answer": "All of the above" |
| 37 | + } |
| 38 | + ] |
| 39 | + }, |
| 40 | + { |
| 41 | + "question": "Which are the main attributes of the Ethereum blockchain? ", |
| 42 | + "options": [ |
| 43 | + { |
| 44 | + "answer": "Centralized" |
| 45 | + }, |
| 46 | + { |
| 47 | + "answer": "Permissionless", |
| 48 | + "correct": true |
| 49 | + }, |
| 50 | + { |
| 51 | + "answer": "Consensus", |
| 52 | + "correct": true |
| 53 | + }, |
| 54 | + { |
| 55 | + "answer": "Decentralized", |
| 56 | + "correct": true |
| 57 | + } |
| 58 | + ] |
| 59 | + }, |
| 60 | + { |
| 61 | + "question": "Ethereum’s upgrade on bitcoin technology allows:", |
| 62 | + "options": [ |
| 63 | + { |
| 64 | + "answer": "consensus mechanisms" |
| 65 | + }, |
| 66 | + { |
| 67 | + "answer": "Decentralization and transparency" |
| 68 | + }, |
| 69 | + { |
| 70 | + "answer": "Logic processing via smart contracts", |
| 71 | + "correct": true |
| 72 | + } |
| 73 | + ] |
| 74 | + }, |
| 75 | + { |
| 76 | + "question": "A smart contract deployed to the Blockchain:", |
| 77 | + "options": [ |
| 78 | + { |
| 79 | + "answer": "Can be edited without redeployment once you have the owner’s credentials" |
| 80 | + }, |
| 81 | + { |
| 82 | + "answer": "Includes data, rules, and instructions for user transactions only for that contract" |
| 83 | + }, |
| 84 | + { |
| 85 | + "answer": "Contains instructions that can modify previous blocks on the blockchain" |
| 86 | + }, |
| 87 | + { |
| 88 | + "answer": "None of the above", |
| 89 | + "correct": true |
| 90 | + } |
| 91 | + ] |
| 92 | + }, |
| 93 | + { |
| 94 | + "question": "Apart from a user wallet, what else owns a blockchain address?", |
| 95 | + "options": [ |
| 96 | + { |
| 97 | + "answer": "A smart contract function" |
| 98 | + }, |
| 99 | + { |
| 100 | + "answer": "A smart contract", |
| 101 | + "correct": true |
| 102 | + }, |
| 103 | + { |
| 104 | + "answer": "A transaction log" |
| 105 | + }, |
| 106 | + { |
| 107 | + "answer": "An indexed parameter" |
| 108 | + } |
| 109 | + ] |
| 110 | + }, |
| 111 | + { |
| 112 | + "question": "How many parameters can we have in an event?", |
| 113 | + "options": [ |
| 114 | + { |
| 115 | + "answer": "A. multiple non-indexed parameters" |
| 116 | + }, |
| 117 | + { |
| 118 | + "answer": "B. three indexed named parameters" |
| 119 | + }, |
| 120 | + { |
| 121 | + "answer": "C. four indexed anonymous parameters" |
| 122 | + }, |
| 123 | + { |
| 124 | + "answer": "only A and B" |
| 125 | + }, |
| 126 | + { |
| 127 | + "answer": "only B and C" |
| 128 | + }, |
| 129 | + { |
| 130 | + "answer": "A, B and C", |
| 131 | + "correct": true |
| 132 | + } |
| 133 | + ] |
| 134 | + }, |
| 135 | + { |
| 136 | + "question": "State variables stay permanently on the blockchain", |
| 137 | + "options": [ |
| 138 | + { |
| 139 | + "answer": "True", |
| 140 | + "correct": true |
| 141 | + }, |
| 142 | + { |
| 143 | + "answer": "False" |
| 144 | + } |
| 145 | + ] |
| 146 | + }, |
| 147 | + { |
| 148 | + "question": "Which of the following isn’t a 'type'?", |
| 149 | + "options": [ |
| 150 | + { |
| 151 | + "answer": "a string" |
| 152 | + }, |
| 153 | + { |
| 154 | + "answer": "a function", |
| 155 | + "correct": true |
| 156 | + }, |
| 157 | + { |
| 158 | + "answer": "a uint" |
| 159 | + } |
| 160 | + ] |
| 161 | + } |
| 162 | + ] |
| 163 | +} |
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