Data Structures in R Programming MCQ question and answer with solution | R Programming MCQs

A. Renaming a variable in a data frame in R is surprisingly hard to do

B. The mutate() function exists to compute transformations of variables in a data frame

C. mute() function, which does the same thing as mutate() but then drops all non-transformed variables

D. The data frame is a key data structure in statistics and in R

A. 3

B. 2

C. 1

D. 0

A. save

B. put

C. save_image

D. get

A. There are three operators that can be used to extract subsets of R objects

B. The [ operator is used to extract elements of a list or data frame by literal name

C. The [[ operator is used to extract elements of a list or data frame by string name

D. There are five operators that can be used to extract subsets of R objects

A. save()

B. save.image()

C. serialize()

D. deserialize()

A. dput()

B. write()

C. dump()

D. dget()

A. raw vector

B. character vector

C. integer vector

D. binary vector

A. x[[c(2, 1)]]

B. x[[c(1, 2)]]

C. x[[c(2, 1,1)]]

D. x[[(2, 2,1)]]

A. filter

B. union

C. set difference

D. get difference

A. 1 2 3 4 5

B. 2 3 5

C. 1 3 3 5

D. 1 2 3