Q. Which of the following function gives information about top level data?

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Q. Point out the correct statement.

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Q. Which of the following function is used for quantiles of quantitative values?

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Q. Which of the following function is used for determining missing values?

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Q. Point out the wrong statement.

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Q. Which of the following transforms can be performed with data value?

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Q. Each observation forms a column in tidy data.

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Q. Which of the following function is used for casting data frames?

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Q. Which of the following join is by default used in plyr package?

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Q. mutate function is used for casting as multi dimensional arrays.

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Q. Which of the following function is good for the automatic splitting of names?

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Q. Point out the correct statement.

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Q. Which of the following function is used for fixing character vectors?

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Q. Which of the following metacharacter is used to refer to any character?

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Q. Point out the wrong statement.

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Q. Which of the following is used for specifying character class with metacharacter?

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Q. Regular expressions can be thought of as a combination of literals and metacharacters.

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Q. Which of the following signs are used to indicate repetition?

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Q. Which of the following function is used for searching text strings by means of regular expression?

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Q. merge function is used for merging data frames.

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