Q. Connections to text files can be created with the ________ function.

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Q. Which of the following R code creates a connection to ‘foo.txt’?

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Q. Which of the following code opens a connection to the file foo.txt, reads from it, and closes the connection when its done?

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Q. Which of the following opens connection to gz-compressed text file?

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Q. Point out the correct statement?

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Q. Point out the wrong statement?

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Q. Point out the correct statement?

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Q. Point out the wrong statement?

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Q. Point out the wrong statement?

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Q. Which of the following code represents internal representation of a Date object?

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Q. Which of the following function gives the day of the week?

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Q. Point out the correct statement?

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Q. Point out the wrong statement?

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Q. Which of the following return a subset of the columns of a data frame?

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Q. Point out the correct statement?

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Q. _________ extract a subset of rows from a dataframe based on logical conditions.

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Q. _________ generate summary statistics of different variables in the data frame, possibly within strata.

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Q. Point out the wrong statement?

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Q. ________ add new variables/columns or transform existing variables.

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Q. The _______ operator is used to connect multiple verb actions together into a pipeline.

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