R Programming MCQ Questions with answers and solutions Page 15

Q. What does the R function seq(1, 10, by = 2) produce?

(A) 1, 3, 5, 7, 9
(B) 1, 2, 3, 4, 5
(C) 1, 4, 7, 10
(D) 2, 4, 6, 8, 10

💬 Discuss

✅ Correct Answer: (A) 1, 3, 5, 7, 9

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. How do you check the class of an object in R?

(A) class(object)
(B) type(object)
(C) typeof(object)
(D) obj_class(object)

💬 Discuss

✅ Correct Answer: (A) class(object)

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. What is the purpose of the R function rnorm(100, mean = 0, sd = 1)?

(A) Generate 100 random numbers from a normal distribution with mean 0 and SD 1
(B) Generate a sequence from 1 to 100 with mean 0 and SD 1
(C) Create a normal distribution plot
(D) Compute the cumulative distribution function

💬 Discuss

✅ Correct Answer: (A) Generate 100 random numbers from a normal distribution with mean 0 and SD 1

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. Which operator is used for element-wise multiplication in R?

(A) *
(B) %*%
(C) %%%
(D) %^%

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✅ Correct Answer: (A) *

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. In R, what is the purpose of the rep() function?

(A) Repeat elements of a vector or a sequence
(B) Replace elements in a vector
(C) Resize a data frame
(D) Represent a sequence

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

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. What is the primary purpose of R programming language?

(A) Web Development
(B) Data Analysis
(C) Game Development
(D) Mobile App Development

💬 Discuss

✅ Correct Answer: (B) Data Analysis

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

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

(A) Returns the sum of elements
(B) Returns the number of elements
(C) Sorts the elements
(D) Computes the mean

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✅ Correct Answer: (B) Returns the number of elements

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. How is a comment denoted in R?

(A) // Comment
(B) /* Comment */
(C) # Comment
(D) -- Comment

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✅ Correct Answer: (C) # Comment

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

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

(A) Load a package
(B) Uninstall a package
(C) Install a new package
(D) Update all packages

💬 Discuss

✅ Correct Answer: (C) Install a new package

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

Q. Which of the following is a correct variable name in R?

(A) 123_variable
(B) variable_name_123
(C) my-variable
(D) 1st_variable

💬 Discuss

✅ Correct Answer: (B) variable_name_123

Published by Mr. Dubey ⭐ 111.42K Points at 21-Apr-2024 10:04 am in R Programming

R Programming MCQs with answers Page - 15

Q. What does the R function seq(1, 10, by = 2) produce?

Q. How do you check the class of an object in R?

Q. What is the purpose of the R function rnorm(100, mean = 0, sd = 1)?

Q. Which operator is used for element-wise multiplication in R?

Q. In R, what is the purpose of the rep() function?

Q. What is the primary purpose of R programming language?

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

Q. How is a comment denoted in R?

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

Q. Which of the following is a correct variable name in R?

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