R Programming MCQ Questions with answers and solutions Page 55

Q. Two vectors M and N are defined as M <- c(3, 2, 4) and N <- c(1, 2). What will be the output of vector Z that is defined as Z <- M*N.

(A) Z <- (3, 2, 4)
(B) Z <- (3, 6, 4)
(C) Z <- (3, 4, 5)
(D) Z <- (3, 4, 4)

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✅ Correct Answer: (D) Z <- (3, 4, 4)

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

Q. A programmer builds a . . . . . . . . to avoid repeating the same task or reduce complexity.

(A) Function
(B) Package
(C) Code
(D) Console

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✅ Correct Answer: (A) Function

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

Q. Point out the correct statement?

(A) R has a number of ways to indicate to you that something's not right
(B) Executing any function in R may result in the condition
(C) "condition" is a generic concept for indicating that something unexpected has occurred
(D) All of the mentioned

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✅ Correct Answer: (D) All of the mentioned

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

Q. Which of the following is valid body of split function?

(A) function (x, f)
(B) function (x, drop = FALSE, ...)
(C) function (x, f, drop = FALSE, ...)
(D) function (drop = FALSE, ...)

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✅ Correct Answer: (C) function (x, f, drop = FALSE, ...)

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

Q. Which of the following is apply function in R?

(A) apply()
(B) tapply()
(C) fapply()
(D) rapply()

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✅ Correct Answer: (B) tapply()

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

Q. . . . . . . . . returns TRUE then X can be termed as a matrix data object.

(A) is."matrix(X")
(B) is.matrix(X)
(C) is.notamatrix(X )
(D) is.matrix("X")

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✅ Correct Answer: (B) is.matrix(X)

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

Q. . . . . . . . . package provides basic functionalities in R environment like arithmetic calculations, input/output.

(A) R base
(B) R boost
(C) R serve
(D) R comm

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✅ Correct Answer: (A) R base

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 <- 3
> switch(x, 2+2, mean(1:10), rnorm(5))

(A) 2.2903605 2.3271663 -0.7060073 1.3622045 -0.2892720
(B) 5.5
(C) NULL
(D) Error

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✅ Correct Answer: (A) 2.2903605 2.3271663 -0.7060073 1.3622045 -0.2892720

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 <- 1:4
> lapply(x, runif)

(A) [[1]] [1] 0.02778712 [[2]] [1] 0.5273108 0.8803191 [[3]] [1] 0.37306337 0.04795913 0.13862825 [[4]] [1] 0.3214921 0.1548316 0.1322282 0.2213059
(B) [[1]] [1] 1.02778712 [[2]] [1] 2.5273108 0.8803191 [[3]] [1] 3.37306337 0.04795913 0.13862825 [[4]] [1] 0.3214921 0.1548316 0.1322282 0.2213059
(C) [[1]] [1] 1.02778712 [[2]] [1] 0.5273108 0.8803191 [[3]] [1] 0.37306337 0.04795913 0.13862825 [[4]] [1] 3.3214921 2.1548316 1.1322282 0.2213059
(D) Error

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✅ Correct Answer: (A) [[1]] [1] 0.02778712 [[2]] [1] 0.5273108 0.8803191 [[3]] [1] 0.37306337 0.04795913 0.13862825 [[4]] [1] 0.3214921 0.1548316 0.1322282 0.2213059

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 <- c("a", "b", "c", "d")
> for(i in 1:4) {
+ ## Print out each element of 'x'
+ print(x[i])
+ }

(A) [1] "a" [1] "b" [1] "c" [1] "d"
(B) [1] "c" [1] "b" [1] "a" [1] "d"
(C) [1] "d" [1] "c" [1] "b" [1] "a"
(D) Error

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✅ Correct Answer: (A) [1] "a" [1] "b" [1] "c" [1] "d"

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

R Programming MCQs with answers Page - 55

Q. Two vectors M and N are defined as M <- c(3, 2, 4) and N <- c(1, 2). What will be the output of vector Z that is defined as Z <- M*N.

Q. A programmer builds a . . . . . . . . to avoid repeating the same task or reduce complexity.

Q. Point out the correct statement?

Q. Which of the following is valid body of split function?

Q. Which of the following is apply function in R?

Q. . . . . . . . . returns TRUE then X can be termed as a matrix data object.

Q. . . . . . . . . package provides basic functionalities in R environment like arithmetic calculations, input/output.

Q. What will be the output of the following R code?
> x <- 3
> switch(x, 2+2, mean(1:10), rnorm(5))

Q. What will be the output of the following R code?
> x <- 1:4
> lapply(x, runif)

Q. What will be the output of the following R code?
> x <- c("a", "b", "c", "d")
> for(i in 1:4) {
+ ## Print out each element of 'x'
+ print(x[i])
+ }

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R Programming MCQs with answers Page - 55

Q. Two vectors M and N are defined as M <- c(3, 2, 4) and N <- c(1, 2). What will be the output of vector Z that is defined as Z <- M*N.

Q. A programmer builds a . . . . . . . . to avoid repeating the same task or reduce complexity.

Q. Point out the correct statement?

Q. Which of the following is valid body of split function?

Q. Which of the following is apply function in R?

Q. . . . . . . . . returns TRUE then X can be termed as a matrix data object.

Q. . . . . . . . . package provides basic functionalities in R environment like arithmetic calculations, input/output.

Q. What will be the output of the following R code? > x <- 3 > switch(x, 2+2, mean(1:10), rnorm(5))

Q. What will be the output of the following R code? > x <- 1:4 > lapply(x, runif)

Q. What will be the output of the following R code? > x <- c("a", "b", "c", "d") > for(i in 1:4) { + ## Print out each element of 'x' + print(x[i]) + }

Programming Categories

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Q. What will be the output of the following R code?
> x <- 3
> switch(x, 2+2, mean(1:10), rnorm(5))

Q. What will be the output of the following R code?
> x <- 1:4
> lapply(x, runif)

Q. What will be the output of the following R code?
> x <- c("a", "b", "c", "d")
> for(i in 1:4) {
+ ## Print out each element of 'x'
+ print(x[i])
+ }