R Programming MCQ Questions with answers and solutions Page 27

Q. In R, how is the minimum value of a numeric vector calculated using the min() function?

(A) min(vector)
(B) minimum(vector)
(C) vectorMin(vector)
(D) min_value(vector)

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✅ Correct Answer: (A) min(vector)

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

Q. What does the rev() function do in R?

(A) Reverse the order of elements
(B) Remove duplicate elements
(C) Rotate elements to the right
(D) Sort elements in descending order

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✅ Correct Answer: (A) Reverse the order of elements

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

Q. How do you create a vector of logical values in R?

(A) c(TRUE, FALSE, TRUE)
(B) vector(TRUE, FALSE, TRUE)
(C) logical_vector(TRUE, FALSE, TRUE)
(D) create_logical_vector(TRUE, FALSE)

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✅ Correct Answer: (A) c(TRUE, FALSE, TRUE)

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

Q. In R, what does the abs() function do?

(A) Return the absolute values of elements
(B) Compute the average of elements
(C) Calculate the square root
(D) Find the maximum value

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✅ Correct Answer: (A) Return the absolute values of elements

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

Q. What is the purpose of the unique() function in R?

(A) Remove duplicate elements from a vector
(B) Identify unique elements in a vector
(C) Create a vector of unique values
(D) Find the maximum unique value

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✅ Correct Answer: (A) Remove duplicate elements from a vector

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

Q. How do you create a vector of characters in R?

(A) c("apple", "banana", "cherry")
(B) char_vector("apple", "banana", "cherry")
(C) vector("apple", "banana", "cherry")
(D) create_char_vector("apple", "banana")

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✅ Correct Answer: (A) c("apple", "banana", "cherry")

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

Q. What is the role of the rep() function in R?

(A) Repeat elements of a vector
(B) Replace missing values
(C) Remove duplicate elements
(D) Reverse the order of elements

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✅ Correct Answer: (A) Repeat elements of a vector

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

Q. How do you check the data type of a variable in R?

(A) typeof(var)
(B) class(var)
(C) type(var)
(D) checkType(var)

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✅ Correct Answer: (B) class(var)

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

Q. What is the output of 5 %% 2 in R?

(A) 1
(B) 2
(C) 2.5
(D) 0.5

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✅ Correct Answer: (A) 1

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

Q. In R, how do you round a numeric value to the nearest integer using the round() function?

(A) round(5.78)
(B) round_to_int(5.78)
(C) round_up(5.78)
(D) round_down(5.78)

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✅ Correct Answer: (A) round(5.78)

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

R Programming MCQs with answers Page - 27

Q. In R, how is the minimum value of a numeric vector calculated using the min() function?

Q. What does the rev() function do in R?

Q. How do you create a vector of logical values in R?

Q. In R, what does the abs() function do?

Q. What is the purpose of the unique() function in R?

Q. How do you create a vector of characters in R?

Q. What is the role of the rep() function in R?

Q. How do you check the data type of a variable in R?

Q. What is the output of 5 %% 2 in R?

Q. In R, how do you round a numeric value to the nearest integer using the round() function?

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