R Programming MCQs with answers Page - 14

Dear candidates you will find MCQ questions of R Programming here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
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Q. How is a character string defined in R?

  • (A) "Hello, World!"
  • (B) 'Hello, World!'
  • (C) c("Hello", "World")
  • (D) char("Hello, World!")
💬 Discuss
✅ Correct Answer: (A) "Hello, World!"

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. What does the R function table() do?

  • (A) Creates a contingency table
  • (B) Displays the first few rows of a data frame
  • (C) Produces a summary of data
  • (D) Sorts a vector
💬 Discuss
✅ Correct Answer: (A) Creates a contingency table

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. How is the data frame column Age selected in R?

  • (A) data$Age
  • (B) data[,"Age"]
  • (C) data[["Age"]]
  • (D) data.column("Age")
💬 Discuss
✅ Correct Answer: (B) data[,"Age"]

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. What is the purpose of the search() function in R?

  • (A) Displays the search path for loaded packages
  • (B) Searches for a file in the working directory
  • (C) Searches for a keyword in the help
  • (D) Displays the search history
💬 Discuss
✅ Correct Answer: (A) Displays the search path for loaded packages

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. In R, how is the mean of a numeric vector calculated using the mean() function?

  • (A) mean(vector)
  • (B) calculate.mean(vector)
  • (C) vector.mean(vector)
  • (D) avg(vector)
💬 Discuss
✅ Correct Answer: (A) mean(vector)

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. What does the R function read.csv() do?

  • (A) Print the CSV file
  • (B) Read data from a CSV file
  • (C) Create a CSV file
  • (D) Convert data to CSV format
💬 Discuss
✅ Correct Answer: (B) Read data from a CSV file

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. How do you assign a value to a variable in R?

  • (A) var = 10
  • (B) assign(10, var)
  • (C) var <- 10
  • (D) set var = 10
💬 Discuss
✅ Correct Answer: (C) var <- 10

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. Which of the following operators is used for exponentiation in R?

  • (A) **
  • (B) ^
  • (C) //
  • (D) %^%
💬 Discuss
✅ Correct Answer: (B) ^

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. In R, what does the function help.start() do?

  • (A) Open R documentation
  • (B) Display a help menu
  • (C) Start an interactive help system
  • (D) Load help files into memory
💬 Discuss
✅ Correct Answer: (C) Start an interactive help system

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. What does the function summary() do in R?

  • (A) Display a summary of data
  • (B) Print the source code of a function
  • (C) Generate a random sample
  • (D) Provide a summary statistics
💬 Discuss
✅ Correct Answer: (A) Display a summary of data

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

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