R_Programming

Level:-Basic
Q(1)	The _______ operator is used to connect multiple verb actions together into a pipeline.
A	pipe
B	piper
C	start
D	All of the above
Q(2)	Which of the following function is similar to summarize?
A	arrange_by()
B	group()
C	group_by()
D	arrange()
Level:-Intermediate
Q(1)	R has _______ atomic classes of objects.
A	1
B	2
C	4
D	5
Q(2)	_______ adds new variables/columns or transform existing variables.
A	mutate
B	add
C	append
D	arrange
Level:-Expert
Q(1)	_______ opens a connection to a file compressed with gzip.
A	url
B	gzfile
C	bzfile
D	file
Q(2)	_______ applies a function over the margins of an array.
A	apply()
B	lapply()
C	sapply()
D	mapply()

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R_Programming

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