Data Manipulation with dplyr MCQ question and answer with solution | R Programming MCQs

A. The Rprofiler() function starts the profiler in R

B. Using system.time() allows you to test certain functions or code blocks to see if they are taking excessive amounts of time

C. R must not be compiled with profiler support

D. Rprofiler() tabulates how much time is spent inside each function

A. rpois(10, 2)

B. rpois(10, 20)

C. rpois(20, 2)

D. rpois(20, 20)

A. ggplot

B. aes_all

C. aes

D. ggorder

A. autoplotgraph is used to complete ggplot appropriate to a particular data type

B. auto_element wraps up a projection of summary functions

C. ggplot.data create a new ggplot plot from a data frame

D. aes_sdensity display a smooth density estimate

A. Gaussian

B. Parametric

C. Poisson

D. Simulation

A. geolr

B. dplyr

C. d3lr

D. gekl2

A. Rprofiler() tabulates how much time is spent inside each function

B. Rprof() keeps track of the function call stack at regularly sampled intervals

C. By default, the profiler samples the function call stack every 2 seconds

D. R must not be compiled with profiler support

A. [1] 0.01874617 -0.18425254 -1.37133055 -0.59916772 0.29454513
[6] 0.38979430 -1.20807618 -0.36367602 -1.62667268 -0.25647839

B. [1] 22.20356 21.51156 19.52353 21.97489 21.48278 20.17869 18.09011
[8] 19.60970 21.85104 20.96596

C. Min. 1st Qu. Median Mean 3rd Qu. Max.
18.09 19.75 21.22 20.74 21.77 22.20

D. Error

A. scatterplot

B. dotplot

C. xyplot

D. zyplot

A. the size of the plotting symbol in a scatterplot

B. the line width in the base graphics system

C. the orientation of the axis labels on the plot

D. the plotting symbol/character in the base graphics system