R Programming MCQs with answers Page - 25

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. Data frames can have additional attributes such as . . . . . . . .

  • (A) Rowname()
  • (B) Rownames()
  • (C) R.names()
  • (D) D.names()
💬 Discuss
✅ Correct Answer: (B) Rownames()

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

Q. The . . . . . . . . function takes an arbitrary number of arguments and concatenates them one by one into character strings.

  • (A) copy()
  • (B) paste()
  • (C) bind()
  • (D) del()
💬 Discuss
✅ Correct Answer: (A) copy()

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

Q. All columns in a matrix must have the same mode and the . . . . . . . . length.

  • (A) Different
  • (B) Same
  • (C) May be the same
  • (D) May be different
💬 Discuss
✅ Correct Answer: (B) Same

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

Q. The four most frequently used types of data objects in R are vectors, matrices, data frames and . . . . . . . .

  • (A) Function
  • (B) Lists
  • (C) Packages
  • (D) Interfaces
💬 Discuss
✅ Correct Answer: (B) Lists

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

Q. . . . . . . . .are Data frames which contain lists of homogeneous data in a tabular format.

  • (A) Matrix
  • (B) Vector
  • (C) Lists
  • (D) Array
💬 Discuss
✅ Correct Answer: (A) Matrix

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 <- 1:3
> y <- 10:12
> rbind(x, y)

  • (A) [,1] [,2] [,3] x 1 2 3 y 10 11 12
  • (B) [,1] [,2] [,3] x 1 2 3 y 10 11
  • (C) [,1] [,2] [,3] x 1 2 3 y 4 5 6
  • (D) [,4] [,5] [,3] x 1 3 5 y 4 5 2
💬 Discuss
✅ Correct Answer: (A) [,1] [,2] [,3] x 1 2 3 y 10 11 12

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

Q. Decimal values are referred as . . . . . . . . data types in R.

  • (A) Numeric
  • (B) Character
  • (C) Integer
  • (D) Lists
💬 Discuss
✅ Correct Answer: (A) Numeric

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

Q. The . . . . . . . . function can be used to create vectors of objects by concatenating things together.

  • (A) cp()
  • (B) c()
  • (C) concat()
  • (D) con()
💬 Discuss
✅ Correct Answer: (B) c()

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

Q. An ordered factor is used to represent an . . . . . . . .

  • (A) Ordinal variable
  • (B) Simple variable
  • (C) Coordinal variable
  • (D) Biordinal variable
💬 Discuss
✅ Correct Answer: (A) Ordinal variable

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 <- c("a", "b", "c")
> as.numeric(x)

  • (A) Warning
  • (B) Error
  • (C) Abnormal termination
  • (D) Prints x
💬 Discuss
✅ Correct Answer: (A) Warning

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

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