RA-Test2

What symbol is used in R for commenting out a line of code?

• #

• /

• ---

• %

Which function in R is used to read a CSV file?

• read.csv()

• load.csv()

• import.csv()

• get.csv()

What operator is used for element-wise multiplication in R?

• **

• *

• %*

• .*

Which function is used to create a sequence of numbers in R?

• seq()

• range()

• series()

• list()

Which function is used to combine multiple vectors into a data frame in R?

• cbind()

• rbind()

• merge()

• data.frame()

Which of the following is a popular repository for installing R package?

• Github

• CRAN

• Stack Overflow

• Kaggle

Which operator is used for logical AND in R?

• ||

• &&

• AND

• &

What does the lapply() function do?

• Applies a function over a list and returns a list

• Applies a function to each row of a dataframe

• Linear approximation

• Lazy evaluation of an expression

What symbol is used to assign a value to a variable in R?

• =

• ::

• <-

• <<

Which of the following is a valid variable name in R?

• .varName

• _varName

• var.Name

• varName1