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() |