Getting Data
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Avg score: 0% • Most missed: “Which of the following package is used for reading excel data?”

MCQs on raw data, processed data, tidy data, web reading, API, data summarization and merging, regular expressions and text variables.

Getting Data
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25 Questions

1. Which of the following function gives information about top level data?
2. Which of the following function is used for fixing character vectors?
3. Which of the following function is used for searching text strings by means of regular expression?
4. httr package does not work well with facebook and twitter API.
5. mutate function is used for casting as multi dimensional arrays.
6. Which of the following is an example of raw data?
7. Which of the following is another name for raw data?
8. Which of the following function is used for quantiles of quantitative values?
9. Which of the following data is put into a formula to produce commonly accepted results?
10. Which of the following package loads data from SPSS?
11. Data that summarize all observations in a category are called __________ data.
12. tidyr is a reframing of _______ designed to accompany the tidy data framework.
13. Which of the following package is used for tidy data?
14. Which of the following request can be issued from httr package?
15. Which of the following is the most common problem with messy data?
16. Which of the following package is used for reading JSON data?
17. Which of the following function programmatically extract parts of XML file?
18. Which of the following process involves structuring datasets to facilitate analysis?
19. Each observation forms a column in tidy data.
20. Which of the following signs are used to indicate repetition?
21. Extracting XML is the basis for most web scraping.
22. Raw data in the real-world is tidy and properly formatted.
23. Which of the following join is by default used in plyr package?
24. Which of the following can be used to view all the tables in memory?
25. Which of the following is an example of tidy data?

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