R Programming MCQ Questions with answers and solutions Page 54

Q. Which function is used to select variables and observations from a given dataset?

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

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✅ Correct Answer: (A) Subset()

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am 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 Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:12 am 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 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?
> printmessage <- function(x) {
+ if(x > 0)
+ print("x is greater than zero")
+ else
+ print("x is less than or equal to zero")
+ invisible(x)
+ }
> printmessage(1)

(A) Error
(B) Warning
(C) Messages
(D) 0

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✅ Correct Answer: (A) Error

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

Q. . . . . . . . . is an indication that a fatal problem has occurred and execution of the function stops.

(A) message
(B) error
(C) warning
(D) message & warning

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✅ Correct Answer: (B) error

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

Q. How many types of data structures does R language have?

(A) 2
(B) 3
(C) 5
(D) 8

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✅ Correct Answer: (A) 2

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

Q. To get the current date, the . . . . . . . . function will return a Date object which can be converted to a different class if necessary.

(A) Sys.Time
(B) Sys.Date
(C) Sys.DateTime
(D) DateTime

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✅ Correct Answer: (B) Sys.Date

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

Q. A matrix of scatterplots can be produced using . . . . . . . . function.

(A) Pears
(B) Pairs
(C) Tears
(D) Cars

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✅ Correct Answer: (B) Pairs

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

Q. Point out the correct statement?

(A) In R, a function is an object which has the mode function
(B) R interpreter is able to pass control to the function, along with arguments that may be necessary for the function to accomplish the actions that are desired
(C) Functions are also often written when code must be shared with others or the public
(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. . . . . . . . . suspends the execution of a function wherever it is called and puts the function in debug mode.

(A) debug()
(B) trace()
(C) recover()
(D) browser()

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✅ Correct Answer: (D) browser()

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

R Programming MCQs with answers Page - 54

Q. Which function is used to select variables and observations from a given dataset?

Q. Point out the correct statement?

Q. Point out the wrong statement?

Q. What will be the output of the following R code?
> printmessage <- function(x) {
+ if(x > 0)
+ print("x is greater than zero")
+ else
+ print("x is less than or equal to zero")
+ invisible(x)
+ }
> printmessage(1)

Q. . . . . . . . . is an indication that a fatal problem has occurred and execution of the function stops.

Q. How many types of data structures does R language have?

Q. To get the current date, the . . . . . . . . function will return a Date object which can be converted to a different class if necessary.

Q. A matrix of scatterplots can be produced using . . . . . . . . function.

Q. Point out the correct statement?

Q. . . . . . . . . suspends the execution of a function wherever it is called and puts the function in debug mode.

Programming Categories

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R Programming MCQs with answers Page - 54

Q. Which function is used to select variables and observations from a given dataset?

Q. Point out the correct statement?

Q. Point out the wrong statement?

Q. What will be the output of the following R code? > printmessage <- function(x) { + if(x > 0) + print("x is greater than zero") + else + print("x is less than or equal to zero") + invisible(x) + } > printmessage(1)

Q. . . . . . . . . is an indication that a fatal problem has occurred and execution of the function stops.

Q. How many types of data structures does R language have?

Q. To get the current date, the . . . . . . . . function will return a Date object which can be converted to a different class if necessary.

Q. A matrix of scatterplots can be produced using . . . . . . . . function.

Q. Point out the correct statement?

Q. . . . . . . . . suspends the execution of a function wherever it is called and puts the function in debug mode.

Programming Categories

📱 Download Our App

Q. What will be the output of the following R code?
> printmessage <- function(x) {
+ if(x > 0)
+ print("x is greater than zero")
+ else
+ print("x is less than or equal to zero")
+ invisible(x)
+ }
> printmessage(1)