Q101
Open questionPoint out the correct statement?
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R Programming · all questionsData Manipulation with dplyr
Data Manipulation with dplyr
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
148
Questions
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Q102
Open questionBitmapped file formats can be most useful for . . . . . . . .
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Q103
Open question. . . . . . . . time is time charged to the CPU(s) for the R expression.
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Q104
Open questionSpread function is known as . . . . . . . . in spreadsheets.
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Q105
Open questionPoint out the correct statement?
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Q106
Open questionWhich of the following creates a new ggplot plot from a data frame?
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Q107
Open questionWhat is a geom in the ggplot2 system?
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Q108
Open question. . . . . . . . extract a subset of rows from a data frame based on logical conditions.
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Q109
Open question. . . . . . . . is new package that makes it easy to "tidy" your data.
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Q110
Open questionWhich of the following evaluate the Normal probability density (with a given mean/SD) at a point?
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Q111
Open questionPoint out the correct statement?
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Q112
Open question. . . . . . . . display a smooth density estimate.
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Q113
Open questionWhich of the following is discrete state calculator?
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Q114
Open questionWhich of the following d takes two columns and spreads them into multiple columns?
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Q115
Open questionPoint out the correct statement?
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Q116
Open questionWhich of the following code is not profiled?
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Q117
Open question5 Normal random numbers can be generated with rnorm() by setting seed value to . . . . . . . .
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Q118
Open questionWhich of the following is an example of a valid graphics device in R?
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Q119
Open questionWhat will be the output of the following R code?
> rpois(10, 1)Select an option to see the answer and solution.
Q120
Open questionThe . . . . . . . . function computes the time (in seconds) needed to execute an expression.
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