R Programming MCQ Questions with answers and solutions Page 42

Q. Which function in R language is used to find out whether the means of 2 groups are equal to each other or not?

(A) f.tests ()
(B) l.tests ()
(C) t.tests ()
(D) not exist

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✅ Correct Answer: (C) t.tests ()

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?
> f <- function() {
+ ## This is an empty function
+ }
> class(f)

(A) "function"
(B) "class"
(C) "procedure"
(D) "system"

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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 wrong statement?

(A) Multi-line expressions with curly braces are just not that easy to sort through when working on the command line
(B) lappy() loops over a list, iterating over each element in that list
(C) lapply() does not always returns a list
(D) You cannot use lapply() to evaluate a function multiple times each with a different argument

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✅ Correct Answer: (C) lapply() does not always returns a list

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

Q. . . . . . . . . is used to skip an iteration of a loop.

(A) next
(B) skip
(C) group
(D) cancel

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✅ Correct Answer: (A) next

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?
> f <- function() {
+ ## This is an empty function
+ }
> f()

(A) 0
(B) No result
(C) NULL
(D) 1

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✅ Correct Answer: (C) NULL

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

Q. Which function basically finds the intersection between two different sets of data?

(A) Converge
(B) Merge
(C) Delegate
(D) Swap

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✅ Correct Answer: (B) Merge

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

Q. . . . . . . . . can contain heterogeneous inputs.

(A) Matrix
(B) Data Frames
(C) Matrix and Data Frames
(D) Does not exists

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✅ Correct Answer: (B) Data Frames

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

Q. . . . . . . . . is one type of the simplest machine learning classification algorithms that is a subset of supervised learning based on lazy learning.

(A) K-Nearest Neighbour
(B) Naive Bayes
(C) Travelling Salesman
(D) N-Queen

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✅ Correct Answer: (A) K-Nearest Neighbour

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

Q. hat will be the output of the following R code?
> centre <- function(x, type) {
+ switch(type,
+ mean = mean(x),
+ median = median(x),
+ trimmed = mean(x, trim = .1))
+ }
> x <- rcauchy(10)
> centre(x, "mean")

(A) 0.8760325
(B) 0.5360891
(C) 0.6086504
(D) gives mean with values depending on rcauchy values

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✅ Correct Answer: (D) gives mean with values depending on rcauchy values

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

Q. Point out the wrong statement?

(A) The order of the packages on the search list does not matter
(B) R has separate namespaces for functions and non-functions
(C) Users can configure which packages get loaded on startup so if you are writing a function
(D) The search list can be found by using the search() function

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✅ Correct Answer: (A) The order of the packages on the search list does not matter

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

R Programming MCQs with answers Page - 42

Q. Which function in R language is used to find out whether the means of 2 groups are equal to each other or not?

Q. What will be the output of the following R code?
> f <- function() {
+ ## This is an empty function
+ }
> class(f)

Q. Point out the wrong statement?

Q. . . . . . . . . is used to skip an iteration of a loop.

Q. What will be the output of the following R code?
> f <- function() {
+ ## This is an empty function
+ }
> f()

Q. Which function basically finds the intersection between two different sets of data?

Q. . . . . . . . . can contain heterogeneous inputs.

Q. . . . . . . . . is one type of the simplest machine learning classification algorithms that is a subset of supervised learning based on lazy learning.

Q. hat will be the output of the following R code?
> centre <- function(x, type) {
+ switch(type,
+ mean = mean(x),
+ median = median(x),
+ trimmed = mean(x, trim = .1))
+ }
> x <- rcauchy(10)
> centre(x, "mean")

Q. Point out the wrong statement?

Programming Categories

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R Programming MCQs with answers Page - 42

Q. Which function in R language is used to find out whether the means of 2 groups are equal to each other or not?

Q. What will be the output of the following R code? > f <- function() { + ## This is an empty function + } > class(f)

Q. Point out the wrong statement?

Q. . . . . . . . . is used to skip an iteration of a loop.

Q. What will be the output of the following R code? > f <- function() { + ## This is an empty function + } > f()

Q. Which function basically finds the intersection between two different sets of data?

Q. . . . . . . . . can contain heterogeneous inputs.

Q. . . . . . . . . is one type of the simplest machine learning classification algorithms that is a subset of supervised learning based on lazy learning.

Q. hat will be the output of the following R code? > centre <- function(x, type) { + switch(type, + mean = mean(x), + median = median(x), + trimmed = mean(x, trim = .1)) + } > x <- rcauchy(10) > centre(x, "mean")

Q. Point out the wrong statement?

Programming Categories

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Q. What will be the output of the following R code?
> f <- function() {
+ ## This is an empty function
+ }
> class(f)

Q. What will be the output of the following R code?
> f <- function() {
+ ## This is an empty function
+ }
> f()

Q. hat will be the output of the following R code?
> centre <- function(x, type) {
+ switch(type,
+ mean = mean(x),
+ median = median(x),
+ trimmed = mean(x, trim = .1))
+ }
> x <- rcauchy(10)
> centre(x, "mean")