R Programming MCQ Questions with answers and solutions Page 122

Q. Point out the correct statement?

(A) POSIX represents a portable operating system interface, primarily for UNIX systems
(B) There are different levels of indication that can be used, ranging from mere notification to fatal error
(C) The default input format for POSIX dates consists of the month, followed by the year and day, separated by slashes or dashes
(D) R don't have any way to indicate to you that something's not right

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✅ Correct Answer: (A) POSIX represents a portable operating system interface, primarily for UNIX systems

Published by Sandhya Thakur ⭐ 4.08K Points at 12-Mar-2025 10:24 pm in R Programming

Q. . . . . . . . . function can be used to select the random sample of size 'n' from a huge dataset.

(A) Simple()
(B) Sample()
(C) While()
(D) Signal()

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✅ Correct Answer: (B) Sample()

Published by Sonali Mishra ⭐ 4.53K Points at 12-Mar-2025 10:24 pm in R Programming

Q. What will be the output of the following R code?
> g <- function(x) {
+ a <- 3
+ x+a+y
+ ## 'y' is a free variable
+ }
> y <- 3
> g(2)

(A) 9
(B) 42
(C) 8
(D) Error

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✅ Correct Answer: (C) 8

Published by Praveen Singh ⭐ 36.81K Points at 12-Mar-2025 10:24 pm in R Programming

Q. What will be the output of the following R code snippet?
> g <- function(x) {
+ a <- 3
+ x+a+y
+ ## 'y' is a free variable
+ }
> g(2)

(A) 9
(B) 42
(C) 8
(D) Error

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✅ Correct Answer: (D) Error

Published by Ravi Shankar ⭐ 4.19K Points at 12-Mar-2025 10:24 pm in R Programming

Q. What will be the output of the following R code?
> mean(x)
Error in mean(x) : object 'x' not found
> traceback()

(A) 1: mean(x)
(B) Null
(C) 0
(D) 2

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✅ Correct Answer: (A) 1: mean(x)

Published by Sandhya Thakur ⭐ 4.08K Points at 12-Mar-2025 10:24 pm in R Programming

Q. Point out the correct statement?

(A) The search list can be found by using the searchlist() function
(B) The search list can be found by using the search() function
(C) The global environment or the user's workspace is always the second element of the search list
(D) R has separate namespaces for functions and non-functions

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✅ Correct Answer: (B) The search list can be found by using the search() function

Published by Vikash Gupta ⭐ 33.56K Points at 12-Mar-2025 10:24 pm in R Programming

Q. Point out the wrong statement?

(A) Statements cannot be grouped together using braces '{' and '}'
(B) Computation in R consists of sequentially evaluating statements
(C) Single statements are evaluated when a new line is typed at the end of the syntactically complete statement
(D) next is used to skip an iteration of a loop

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✅ Correct Answer: (A) Statements cannot be grouped together using braces '{' and '}'

Published by Praveen Singh ⭐ 36.81K Points at 12-Mar-2025 10:24 pm 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 Ravi Shankar ⭐ 4.19K Points at 12-Mar-2025 10:24 pm 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 Rakesh Kumar ⭐ 28.44K Points at 12-Mar-2025 10:24 pm in R Programming

Q. Point out the wrong statement?

(A) A formal argument can be a symbol, a statement of the form 'symbol = expression', or the special formal argument
(B) The first component of the function declaration is the keyword function
(C) The value returned by the call to function is not a function
(D) Functions are also often written when code must be shared with others or the public

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✅ Correct Answer: (A) A formal argument can be a symbol, a statement of the form 'symbol = expression', or the special formal argument

Published by Vikash Gupta ⭐ 33.56K Points at 12-Mar-2025 10:24 pm in R Programming

R Programming MCQs with answers Page - 122

Q. Point out the correct statement?

Q. . . . . . . . . function can be used to select the random sample of size 'n' from a huge dataset.

Q. What will be the output of the following R code?
> g <- function(x) {
+ a <- 3
+ x+a+y
+ ## 'y' is a free variable
+ }
> y <- 3
> g(2)

Q. What will be the output of the following R code snippet?
> g <- function(x) {
+ a <- 3
+ x+a+y
+ ## 'y' is a free variable
+ }
> g(2)

Q. What will be the output of the following R code?
> mean(x)
Error in mean(x) : object 'x' not found
> traceback()

Q. Point out the correct statement?

Q. Point out the wrong statement?

Q. Point out the correct statement?

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])
+ }

Q. Point out the wrong statement?

Programming Categories

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R Programming MCQs with answers Page - 122

Q. Point out the correct statement?

Q. . . . . . . . . function can be used to select the random sample of size 'n' from a huge dataset.

Q. What will be the output of the following R code? > g <- function(x) { + a <- 3 + x+a+y + ## 'y' is a free variable + } > y <- 3 > g(2)

Q. What will be the output of the following R code snippet? > g <- function(x) { + a <- 3 + x+a+y + ## 'y' is a free variable + } > g(2)

Q. What will be the output of the following R code? > mean(x) Error in mean(x) : object 'x' not found > traceback()

Q. Point out the correct statement?

Q. Point out the wrong statement?

Q. Point out the correct statement?

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]) + }

Q. Point out the wrong statement?

Programming Categories

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Q. What will be the output of the following R code?
> g <- function(x) {
+ a <- 3
+ x+a+y
+ ## 'y' is a free variable
+ }
> y <- 3
> g(2)

Q. What will be the output of the following R code snippet?
> g <- function(x) {
+ a <- 3
+ x+a+y
+ ## 'y' is a free variable
+ }
> g(2)

Q. What will be the output of the following R code?
> mean(x)
Error in mean(x) : object 'x' not found
> traceback()

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])
+ }