R Programming MCQs with answers Page - 63

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Q. . . . . . . . . modifies geom/stat aesthetic defaults for future plots.

  • (A) translate_qplot_base
  • (B) translate_qplot_gpl
  • (C) translate_qplot_defaults
  • (D) translate_qplot_ggplot
💬 Discuss
✅ Correct Answer: (C) translate_qplot_defaults

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

Q. Which of the following merges two variables into one?

  • (A) spread()
  • (B) gather()
  • (C) separate()
  • (D) unite()
💬 Discuss
✅ Correct Answer: (B) gather()

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

Q. Point out the correct statement?

  • (A) "by.total" first subtracts out time spent in functions above the current function in the call stack
  • (B) The summaryRprof() function calculates how much time is spend in which function
  • (C) By default, the profiler samples the function call stack every 0.02 seconds
  • (D) The Rprofiler() function starts the profiler in R
💬 Discuss
✅ Correct Answer: (C) By default, the profiler samples the function call stack every 0.02 seconds

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

Q. Point out the correct statement?

  • (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
💬 Discuss
✅ Correct Answer: (B) Using system.time() allows you to test certain functions or code blocks to see if they are taking excessive amounts of time

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

Q. Which of the following code represents count with mean of 2?

  • (A) rpois(10, 2)
  • (B) rpois(10, 20)
  • (C) rpois(20, 2)
  • (D) rpois(20, 20)
💬 Discuss
✅ Correct Answer: (A) rpois(10, 2)

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

Q. Which of the following create a set of identity mappings?

  • (A) ggplot
  • (B) aes_all
  • (C) aes
  • (D) ggorder
💬 Discuss
✅ Correct Answer: (D) ggorder

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

Q. Point out the correct statement?

  • (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
💬 Discuss
✅ Correct Answer: (C) ggplot.data create a new ggplot plot from a data frame

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

Q. . . . . . . . . distribution is commonly used to model data that come in the form of counts.

  • (A) Gaussian
  • (B) Parametric
  • (C) Poisson
  • (D) Simulation
💬 Discuss
✅ Correct Answer: (C) Poisson

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

Q. Which of the following is complementary to tidyr?

  • (A) geolr
  • (B) dplyr
  • (C) d3lr
  • (D) gekl2
💬 Discuss
✅ Correct Answer: (B) dplyr

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

Q. Point out the correct statement?

  • (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
💬 Discuss
✅ Correct Answer: (B) Rprof() keeps track of the function call stack at regularly sampled intervals

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:13 am in R Programming

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