R Programming MCQ Questions with answers and solutions Page 52

Q. Functions are defined using the . . . . . . . . directive and are stored as R objects.

(A) function()
(B) funct()
(C) functions()
(D) fun()

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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. MapReduce jobs submitted from either Oozie, Pig or Hive can be used to encode, improve and sample the data sets from . . . . . . . . into R.

(A) HDLS
(B) HDFS
(C) HDLSV
(D) HSSLV

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✅ Correct Answer: (B) HDFS

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?
> y <- "fruit"
> switch(y, fruit = "banana", vegetable = "broccoli", "Neither")

(A) "banana"
(B) "Neither"
(C) "broccoli"
(D) Error

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✅ Correct Answer: (A) "banana"

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

Q. Which of the following R code generate a sequence of integers from 1 to 10?

(A) > for(i in 1:9) { + print(i) + } [1]
(B) > for(i in 0:9) { + print(i) + } [1]
(C) > for(i in 1:10) { + print(i) + } [1]
(D) > for(i in 2:50) { + print("i") + } [1]

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✅ Correct Answer: (C) > for(i in 1:10) { + print(i) + } [1]

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

Q. . . . . . . . . function is usually used inside another function and throws a warning whenever a particular package is not found.

(A) Dplyr
(B) Require
(C) Coin
(D) Sample

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✅ Correct Answer: (B) Require

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 snippet?
> lm <- function(x) { x * x }
> lm

(A) function(x) { x * x }
(B) func(x) { x * x }
(C) function(x) { x / x }
(D) function { x $ x }

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✅ Correct Answer: (A) function(x) { x * x }

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

Q. Write the syntax to set the path of the current working directory in R environment?

(A) Setwd("dipath")
(B) Setwd(dir_path)
(C) Setwd("dir_path")
(D) Set("dir_path")

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✅ Correct Answer: (C) Setwd("dir_path")

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

Q. Which of the following language supports lexical scoping?

(A) Perl
(B) Python
(C) Common Lisp
(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. What will be the value of following R expression?

(A) Warning in log(c(-1, 2)): NaNs produced
(B) Error in log(c(-1, 2)): NaNs produced
(C) Message
(D) All of the mentioned

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✅ Correct Answer: (B) Error in log(c(-1, 2)): NaNs produced

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(6, 2+2, mean(1:10), rnorm(5))

(A) 10
(B) 1
(C) NULL
(D) 5

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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

R Programming MCQs with answers Page - 52

Q. Functions are defined using the . . . . . . . . directive and are stored as R objects.

Q. MapReduce jobs submitted from either Oozie, Pig or Hive can be used to encode, improve and sample the data sets from . . . . . . . . into R.

Q. What will be the output of the following R code?
> y <- "fruit"
> switch(y, fruit = "banana", vegetable = "broccoli", "Neither")

Q. Which of the following R code generate a sequence of integers from 1 to 10?

Q. . . . . . . . . function is usually used inside another function and throws a warning whenever a particular package is not found.

Q. What will be the output of the following R code snippet?
> lm <- function(x) { x * x }
> lm

Q. Write the syntax to set the path of the current working directory in R environment?

Q. Which of the following language supports lexical scoping?

Q. What will be the value of following R expression?

Q. What will be the output of the following R code?
> x <- 3
> switch(6, 2+2, mean(1:10), rnorm(5))

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R Programming MCQs with answers Page - 52

Q. Functions are defined using the . . . . . . . . directive and are stored as R objects.

Q. MapReduce jobs submitted from either Oozie, Pig or Hive can be used to encode, improve and sample the data sets from . . . . . . . . into R.

Q. What will be the output of the following R code? > y <- "fruit" > switch(y, fruit = "banana", vegetable = "broccoli", "Neither")

Q. Which of the following R code generate a sequence of integers from 1 to 10?

Q. . . . . . . . . function is usually used inside another function and throws a warning whenever a particular package is not found.

Q. What will be the output of the following R code snippet? > lm <- function(x) { x * x } > lm

Q. Write the syntax to set the path of the current working directory in R environment?

Q. Which of the following language supports lexical scoping?

Q. What will be the value of following R expression?

Q. What will be the output of the following R code? > x <- 3 > switch(6, 2+2, mean(1:10), rnorm(5))

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Q. What will be the output of the following R code?
> y <- "fruit"
> switch(y, fruit = "banana", vegetable = "broccoli", "Neither")

Q. What will be the output of the following R code snippet?
> lm <- function(x) { x * x }
> lm

Q. What will be the output of the following R code?
> x <- 3
> switch(6, 2+2, mean(1:10), rnorm(5))