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/GoogleCloud/quizes/Chapter2_Quizes.json
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| a | b/GoogleCloud/quizes/Chapter2_Quizes.json | ||
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| 1 | [ |
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| 2 | { |
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| 3 | "question": "Which of the following R data structures are homogeneous:", |
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| 4 | "type": "many_choice", |
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| 5 | "shuffle_answers": true, |
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| 6 | "answers": [ |
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| 7 | { |
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| 8 | "answer": "Vector", |
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| 9 | "correct": true, |
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| 10 | "feedback": "Correct." |
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| 11 | }, |
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| 12 | { |
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| 13 | "answer": "Matrix", |
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| 14 | "correct": true, |
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| 15 | "feedback": "Correct." |
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| 16 | }, |
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| 17 | { |
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| 18 | "answer": "Array", |
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| 19 | "correct": true, |
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| 20 | "feedback": "Correct." |
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| 21 | }, |
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| 22 | { |
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| 23 | "answer": "List", |
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| 24 | "correct": false, |
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| 25 | "feedback": "Incorrect. A list can contain any type of data." |
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| 26 | }, |
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| 27 | { |
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| 28 | "answer": "Data Frame", |
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| 29 | "correct": false, |
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| 30 | "feedback": "Incorrect. A column of a data frame can be of any data type, but the data within a given column must be of the same type." |
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| 31 | }, |
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| 32 | { |
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| 33 | "answer": "Tibble", |
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| 34 | "correct": false, |
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| 35 | "feedback": "Incorrect. A tibble is a modified data frame." |
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| 36 | } |
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| 37 | ] |
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| 38 | }, |
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| 39 | { |
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| 40 | "question": "Which if the following is true of a matrix?", |
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| 41 | "type": "many_choice", |
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| 42 | "shuffle_answers": true, |
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| 43 | "answers": [ |
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| 44 | { |
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| 45 | "answer": "2-dimensional", |
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| 46 | "correct": true, |
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| 47 | "feedback": "Correct." |
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| 48 | }, |
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| 49 | { |
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| 50 | "answer": "Homogeneous", |
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| 51 | "correct": true, |
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| 52 | "feedback": "Correct." |
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| 53 | }, |
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| 54 | { |
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| 55 | "answer": "1-dimensional", |
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| 56 | "correct": false, |
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| 57 | "feedback": "Incorrect." |
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| 58 | }, |
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| 59 | { |
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| 60 | "answer": "Heterogeneous", |
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| 61 | "correct": false, |
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| 62 | "feedback": "Incorrect." |
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| 63 | }, |
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| 64 | { |
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| 65 | "answer": "Must be a square", |
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| 66 | "correct": false, |
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| 67 | "feedback": "Incorrect. The matrix can have unequal dimensions." |
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| 68 | }, |
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| 69 | { |
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| 70 | "answer": "Is an array", |
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| 71 | "correct": true, |
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| 72 | "feedback": "Correct. A matrix is a special type of array." |
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| 73 | } |
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| 74 | ] |
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| 75 | }, |
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| 76 | { |
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| 77 | "question": "When working with data frames, you must be cautious because:", |
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| 78 | "type": "many_choice", |
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| 79 | "shuffle_answers": true, |
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| 80 | "answers": [ |
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| 81 | { |
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| 82 | "answer": "If different data types exist in the data frame, all data will be coerced to a single type.", |
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| 83 | "correct": false, |
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| 84 | "feedback": "Incorrect. A data frame is a heterogeneous data structure." |
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| 85 | }, |
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| 86 | { |
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| 87 | "answer": "If a given column contains different data types, all data within that column will be coerced to a single data type.", |
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| 88 | "correct": true, |
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| 89 | "feedback": "Correct." |
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| 90 | }, |
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| 91 | { |
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| 92 | "answer": "Missing data will be thrown out.", |
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| 93 | "correct": false, |
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| 94 | "feedback": "Incorrect. R can account for missing data." |
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| 95 | }, |
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| 96 | { |
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| 97 | "answer": "R may become confused if your imported input files are not well-formatted.", |
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| 98 | "correct": true, |
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| 99 | "feedback": "Correct. Beware of Excel." |
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| 100 | } |
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| 101 | ] |
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| 102 | } |
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| 103 | ] |