R Programming MCQs with answers Page - 16

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. What does RStudio provide for R programming?

  • (A) A programming language
  • (B) An integrated development environment
  • (C) A statistical model
  • (D) A data storage format
💬 Discuss
✅ Correct Answer: (B) An integrated development environment

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

Q. In R, how is a matrix created using the matrix() function?

  • (A) matrix(1:9, nrow = 3, ncol = 3)
  • (B) create.matrix(1:9, rows = 3, columns = 3)
  • (C) [1, 2, 3; 4, 5, 6; 7, 8, 9]
  • (D) mat(1:9, 3, 3)
💬 Discuss
✅ Correct Answer: (A) matrix(1:9, nrow = 3, ncol = 3)

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

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

  • (A) Display current date and time
  • (B) Extract system information
  • (C) Retrieve the current date
  • (D) Convert date to character
💬 Discuss
✅ Correct Answer: (C) Retrieve the current date

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

Q. Which of the following is a valid R data type?

  • (A) String
  • (B) Boolean
  • (C) Complex
  • (D) All of the above
💬 Discuss
✅ Correct Answer: (D) All of the above

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

Q. How is a data frame created in R?

  • (A) df <- c(1, 2, 3)
  • (B) data.frame(x = 1:3, y = c('A', 'B', 'C'))
  • (C) createDataFrame(1, 2, 3)
  • (D) matrix(1:3, nrow = 1, ncol = 3)
💬 Discuss
✅ Correct Answer: (B) data.frame(x = 1:3, y = c('A', 'B', 'C'))

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

Q. Which of the following is invalid assignment?

  • (A) > c(10.4, 5.6, 3.1, 6.4, 21.7) -> x
  • (B) > assign("x", c(10.4, 5.6, 3.1, 6.4, 21.7))
  • (C) > x <- c(10.4, 5.6, 3.1, 6.4, 21.7)
  • (D) None of the mentioned
💬 Discuss
✅ Correct Answer: (D) None of the mentioned

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

Q. Point out the wrong statement?

  • (A) is.nan() is used to test objects if they are NA
  • (B) is.nan() is used to test for NaN
  • (C) NA values have a class
  • (D) NA values have a class, so there are integer NA, character NA, etc
💬 Discuss
✅ Correct Answer: (A) is.nan() is used to test objects if they are NA

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

Q. If you explicitly want an integer, you need to specify the . . . . . . . . suffix.

  • (A) D
  • (B) R
  • (C) L
  • (D) K
💬 Discuss
✅ Correct Answer: (C) L

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

Q. The first component can be accessed using . . . . . . . . operator.

  • (A) Intraction
  • (B) Extraction
  • (C) AND
  • (D) OR
💬 Discuss
✅ Correct Answer: (B) Extraction

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

Q. What will be the output of the following R code?
> x <- vector("numeric", length = 10)
> x

  • (A) 10
  • (B) 0 0 0 0 0 0 0 0 0 0
  • (C) 01
  • (D) 00120
💬 Discuss
✅ Correct Answer: (B) 0 0 0 0 0 0 0 0 0 0

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

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