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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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