Ivy_Accenture_Data_Analytics_Using_R_Quiz-3

The dplyr package can be installed from CRAN using:

• installall.packages("dplyr")

• install.packages("dplyr")

• install.packages(dplyr)

• All of the mentioned

"dplyr" is one of the most popular packages used in R for manipulating data and it contains 5 core functions to handle data.Which of the following is not one of the core functions of dplyr package?

• select()

• filter()

• arrange()

• summary()

____________ add new columns/variables or transform existing variables

• mutate

• add

• append

• arrange

Which of the following return a subset of the columns of a dataframe?

• select

• retrieve

• get

• All of the mentioned

The _____________ operator is used to connect multiple verb actions together into a pipeline

• pipe

• piper

• start

• All of the mentioned

Columns can be arranged in descending order too by using the special _______________ operator

• desc()

• descending()

• asc()

• subset()

The ___________ function can be used to select columns of a dataframe that you want to focus on

• select

• rename

• get

• All of the mentioned

_______________ generate summary statistics of different variables in the dataframe

• rename

• summarize

• set

• subset

_______________ function is similar to the existing subset() function in R but is quite faster

• rename

• filter

• set

• None of the mentioned

Point out the correct statement:

• You can also omit variables using the select() function by using the negative sign

• The arrange function also allows a special syntax that allows you to specify variable names based on patterns

• Reordering rows of a dataframe is normally easier to do in R

• All of the mentioned