MCQs R Language Quiz 8

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The post is about MCQ on R Language Quiz with Answers. The quiz covers the topics related to R Package qqplot, R Studio, and Data.Frame. Let us start with MCQs R Language Quiz.

Online Multiple Choice Questions about Learning R Programming. It will help the learners to get knowledge of R not only for learning the language but also to get some practices about Statistics with reference to R Programming.

1. Which package is associated with data visualization in R?

 
 
 
 

2. Which statement about the ggsave() function is correct?

 
 
 
 

3. What is the purpose of the rep() function in R?

 
 
 
 

4. Data frames can be converted to a matrix by calling data.

 
 
 
 

5. Which of the following are the benefits of adding labels and annotations to your plot?

 
 
 
 

6. In R studio, what default options does the Export functionality of the Plots tab give for exporting plots?

 
 
 
 

7. The _________ creates a scatterplot and then adds a small amount of random noise to each point in the plot to make the points easier to find.

 
 
 
 

8. In ggplot2, you use the plus sign (+) to add a layer to your plot.

 
 

9. Which of the following is NOT a valid data structure in R?

 
 
 
 

10. Which of the following are operations you can perform in ggplot2?

 
 
 
 

11. Which of the following are the benefits of using ggplot2?

 
 
 
 

12. A data analyst is working with the penguin’s data. The analyst creates a scatterplot with the following code:

ggplot(data = penguins) +
       geom_point(mapping = aes(x = flipper_length_mm, y = body_mass_g, alpha = species))

What does the alpha aesthetic do to the appearance of the points in the plot?

 
 
 
 

13. When creating a plot in ggplot you must set the mapping argument of a function. Which function has the mapping argument?

 
 
 
 

14. Which of the following aesthetics attributes can you map to the data in a scatterplot?

 
 
 
 

15. Which of the following are operations you can perform in ggplot2?

 
 
 
 

16. What is the role of the x argument in the following code?

ggplot(data = diamonds) +
       geom_bar(mapping = aes(x = cut))
 
 
 
 

17. Which ggplot function is used to define the mappings of variables to visual representations of data?

 
 
 
 

18. What does the data.frame function do in R?

 
 
 
 

19. What function can you use to put a text label inside the grid of your plot to call out specific data points?

 
 
 
 

20. What argument of the labs() function can a data analyst use to add text outside of the grid area of a plot?

 
 
 
 


MCQs R Language Quiz

  • Which of the following aesthetic attributes can you map to the data in a scatterplot?
  • What is the role of the x argument in the following code?
    ggplot(data = diamonds) +
    geom_bar(mapping = aes(x = cut))
  • Which of the following are the benefits of adding labels and annotations to your plot?
  • What function can you use to put a text label inside the grid of your plot to call out specific data points?
  • Which of the following are operations you can perform in ggplot2?
  • When creating a plot in ggplot you must set the mapping argument of a function. Which function has the mapping argument?
  • Which ggplot function is used to define the mappings of variables to visual representations of data?
  • Which of the following are the benefits of using ggplot2?
  • What argument of the labs() function can a data analyst use to add text outside of the grid area of a plot?
  • Which statement about the ggsave() function is correct?
  • A data analyst is working with the penguin’s data. The analyst creates a scatterplot with the following code:
    ggplot(data = penguins) +
    geom_point(mapping = aes(x = flipper_length_mm, y = body_mass_g, alpha = species))
  • What does the alpha aesthetic do to the appearance of the points in the plot?
  • The ___________ creates a scatterplot and then adds a small amount of random noise to each point in the plot to make the points easier to find.
  • In R studio, what default options does the Export functionality of the Plots tab give for exporting plots?
  • Which of the following are operations you can perform in ggplot2?
  • In ggplot2, you use the plus sign (+) to add a layer to your plot.
  • Which of the following is NOT a valid data structure in R?
  • What is the purpose of the rep() function in R?
  • Which package is associated with data visualization in R?
  • What does the data.frame function do in R?
  • Data frames can be converted to a matrix by calling data.
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