R Programming MCQ Questions with answers and solutions Page 50

Q. What will be the output of the following R code?
> x <- list(a = 1:4, b = rnorm(10), c = rnorm(20, 1), d = rnorm(100, 5))
> lapply(x, mean)

(A) $a [1] 2.5 $b [1] 1.248845 $c [1] 1.9935285 Loop Functions 90 $d [1] 5.051388
(B) $a [1] 2.5 $b [1] 0.248845 $c [1] 0.9935285 Loop Functions 90 $d [1] 5.051388
(C) $a [1] 3.5 $b [1] 0.248845 $c [1] 0.9935285 Loop Functions 90 $d [1] 5.051388
(D) Error

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✅ Correct Answer: (B) $a [1] 2.5 $b [1] 0.248845 $c [1] 0.9935285 Loop Functions 90 $d [1] 5.051388

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

Q. The . . . . . . . . function takes a vector or other objects and splits it into groups determined by a factor or list of factors.

(A) apply()
(B) lsplit()
(C) split()
(D) mapply()

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✅ Correct Answer: (C) split()

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

Q. The . . . . . . . . function is used to plot negative likelihood.

(A) plot()
(B) graph()
(C) graph.plot()
(D) plot.graph()

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✅ Correct Answer: (A) plot()

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

Q. lappy functions takes . . . . . . . . arguments in R language.

(A) two
(B) three
(C) four
(D) five

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✅ Correct Answer: (C) four

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

Q. Which function is more verbose?

(A) Lapply
(B) Japply
(C) Vapply
(D) Zapply

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✅ Correct Answer: (C) Vapply

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

Q. The . . . . . . . . function returns a list of all the formal arguments of a function.

(A) formals()
(B) funct()
(C) formal()
(D) fun()

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✅ Correct Answer: (A) formals()

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

Q. What will be the output of the following R code?
> x <- list(a = 1:4, b = rnorm(10), c = rnorm(20, 1), d = rnorm(100, 5))
> sapply(x, mean)

(A) a b c d 2.500000 -0.251483 1.481246 4.968715
(B) a b c d 2.500000 -3.251483 2.481246 5.968715
(C) a b c d 3.500000 0.251483 1.481246 4.968715
(D) Error

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✅ Correct Answer: (A) a b c d 2.500000 -0.251483 1.481246 4.968715

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

Q. Which function is used to create a histogram for visualisation in R programming language?

(A) Library
(B) Hist
(C) Data
(D) Refer

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✅ Correct Answer: (B) Hist

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

Q. . . . . . . . . function is used to apply an expression for a given dataset.

(A) This()
(B) With()
(C) Unwith()
(D) That()

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✅ Correct Answer: (B) With()

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

Q. . . . . . . . . function is used in applying a function each level of factors.

(A) With()
(B) By()
(C) To()
(D) Here()

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✅ Correct Answer: (B) By()

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am in R Programming

R Programming MCQs with answers Page - 50

Q. What will be the output of the following R code?
> x <- list(a = 1:4, b = rnorm(10), c = rnorm(20, 1), d = rnorm(100, 5))
> lapply(x, mean)

Q. The . . . . . . . . function takes a vector or other objects and splits it into groups determined by a factor or list of factors.

Q. The . . . . . . . . function is used to plot negative likelihood.

Q. lappy functions takes . . . . . . . . arguments in R language.

Q. Which function is more verbose?

Q. The . . . . . . . . function returns a list of all the formal arguments of a function.

Q. What will be the output of the following R code?
> x <- list(a = 1:4, b = rnorm(10), c = rnorm(20, 1), d = rnorm(100, 5))
> sapply(x, mean)

Q. Which function is used to create a histogram for visualisation in R programming language?

Q. . . . . . . . . function is used to apply an expression for a given dataset.

Q. . . . . . . . . function is used in applying a function each level of factors.

Programming Categories

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R Programming MCQs with answers Page - 50

Q. What will be the output of the following R code? > x <- list(a = 1:4, b = rnorm(10), c = rnorm(20, 1), d = rnorm(100, 5)) > lapply(x, mean)

Q. The . . . . . . . . function takes a vector or other objects and splits it into groups determined by a factor or list of factors.

Q. The . . . . . . . . function is used to plot negative likelihood.

Q. lappy functions takes . . . . . . . . arguments in R language.

Q. Which function is more verbose?

Q. The . . . . . . . . function returns a list of all the formal arguments of a function.

Q. What will be the output of the following R code? > x <- list(a = 1:4, b = rnorm(10), c = rnorm(20, 1), d = rnorm(100, 5)) > sapply(x, mean)

Q. Which function is used to create a histogram for visualisation in R programming language?

Q. . . . . . . . . function is used to apply an expression for a given dataset.

Q. . . . . . . . . function is used in applying a function each level of factors.

Programming Categories

📱 Download Our App

Q. What will be the output of the following R code?
> x <- list(a = 1:4, b = rnorm(10), c = rnorm(20, 1), d = rnorm(100, 5))
> lapply(x, mean)

Q. What will be the output of the following R code?
> x <- list(a = 1:4, b = rnorm(10), c = rnorm(20, 1), d = rnorm(100, 5))
> sapply(x, mean)