R Programming MCQ Questions with answers and solutions Page 51

Q. The recover() function will first print out the function call stack when an . . . . . . . . occurs.

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

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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. The cumulative frequency distribution of a categorical variable can be checked using the . . . . . . . . function in R language.

(A) Sum
(B) Cumsum
(C) Lumpsum
(D) Resum

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✅ Correct Answer: (B) Cumsum

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

Q. R uses . . . . . . . . scoping6 0 or static scoping.

(A) reflective
(B) transitive
(C) lexical
(D) closure

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✅ Correct Answer: (C) lexical

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

Q. R has . . . . . . . . statements that provide explicit looping.

(A) 2
(B) 3
(C) 4
(D) 5

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✅ Correct Answer: (B) 3

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 primary task of debugging any R code is correctly diagnosing what the problem is
(B) R provides only two tools to help you with debugging your code
(C) print statement can be used for debugging purpose
(D) The traceback() function must be called immediately after an error occurs

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✅ Correct Answer: (B) R provides only two tools to help you with debugging your code

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

Q. Which of the following should be preferred for evaluation from list of alternatives?

(A) subsett
(B) eval
(C) switch
(D) set

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✅ Correct Answer: (B) eval

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

Q. What will be the class of the vector if you concatenate a number and a character?

(A) Number
(B) Character
(C) Integer
(D) No class

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✅ Correct Answer: (B) Character

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

Q. Which of the following R code snippet stops loop after 20 iterations?

(A) for(i in 1:100) { print(i) if(i > 20) { break } }
(B) for(i in 1:100) { print(i) if(i > 19) { break } }
(C) for(i in 1:100) { print(i) if(i < 20) { break } }
(D) for(i in 2:100) { print("i") if(i > 150) { break } }

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✅ Correct Answer: (A) for(i in 1:100) { print(i) if(i > 20) { break } }

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

Q. . . . . . . . . package is used to speed up data frame management code.

(A) Data.table
(B) Dplyr
(C) Table
(D) Data.dplyr

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✅ Correct Answer: (B) Dplyr

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

Q. Which of the following is multivariate version of lapply?

(A) apply()
(B) lapply()
(C) sapply()
(D) mapply()

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✅ Correct Answer: (D) mapply()

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

R Programming MCQs with answers Page - 51

Q. The recover() function will first print out the function call stack when an . . . . . . . . occurs.

Q. The cumulative frequency distribution of a categorical variable can be checked using the . . . . . . . . function in R language.

Q. R uses . . . . . . . . scoping6 0 or static scoping.

Q. R has . . . . . . . . statements that provide explicit looping.

Q. Point out the wrong statement?

Q. Which of the following should be preferred for evaluation from list of alternatives?

Q. What will be the class of the vector if you concatenate a number and a character?

Q. Which of the following R code snippet stops loop after 20 iterations?

Q. . . . . . . . . package is used to speed up data frame management code.

Q. Which of the following is multivariate version of lapply?

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