R Programming for Data Mining(dplyr, ggplot2, caret) MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025

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1. : Which function in dplyr is used to select specific columns from a data frame?



2. : How do you filter rows based on a condition in dplyr?



3. : What is the purpose of the mutate function in dplyr?



4. : Which function in dplyr is used to sort data?



5. : How do you group data by one or more variables in dplyr?



6. : Which function in ggplot2 is used to create a plot object?



7. : How do you add a layer for points to a ggplot2 plot?



8. : What is the purpose of the aes function in ggplot2?



9. : Which function is used to add a title to a ggplot2 plot?



10. : How do you create a histogram in ggplot2?



11. : What is the primary use of the caret package in R?



12. : Which function in caret is used to split data into training and testing sets?



13. : How do you train a model using the caret package?



14. : What does the trainControl function in caret specify?



15. : Which method is used to evaluate the performance of a model in caret?



 

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