R Programming Basics — Part 1 MCQs with Explanations

<- is the correct answer to “What symbol is used for assignment in R”. This question is standard in competitive examination syllabi for R Programming Basics.

Display the result of a calculation is the correct answer to “What does the function print() do in R”. This question is standard in competitive examination syllabi for R Programming Basics.

set is the correct answer to “In R, how is a variable assigned a value”. This question is standard in competitive examination syllabi for R Programming Basics.

Create a sequence of numbers is the correct answer to “What is the purpose of the seq() function in R”. This question is standard in competitive examination syllabi for R Programming Basics.

Vector is the correct answer to “In R, what is the primary data structure to store a sequence of elements of the same type”. This question is standard in competitive examination syllabi for R Programming Basics.

Categorical data is the correct answer to “What does the factor data type represent in R”. This question is standard in competitive examination syllabi for R Programming Basics.

# Comment is the correct answer to “In R, how is a comment denoted”. This question is standard in competitive examination syllabi for R Programming Basics.

c(1, 2, 3) is the correct answer to “Which of the following is a valid way to create a numeric vector in R”. This question is standard in competitive examination syllabi for R Programming Basics.

length(vector) is the correct answer to “How is the length of a vector determined in R”. This question is standard in competitive examination syllabi for R Programming Basics.

Concatenate strings is the correct answer to “In R, what is the purpose of the paste() function”. This question is standard in competitive examination syllabi for R Programming Basics.

Repeat elements of a vector is the correct answer to “What is the role of the rep() function in R”. This question is standard in competitive examination syllabi for R Programming Basics.

class(var) is the correct answer to “How do you check the data type of a variable in R”. This question is standard in competitive examination syllabi for R Programming Basics.

1 is the correct answer to “What is the output of 5 %% 2 in R”. This question is standard in competitive examination syllabi for R Programming Basics.

round(5.78) is the correct answer to “In R, how do you round a numeric value to the nearest integer using the round() function”. This question is standard in competitive examination syllabi for R Programming Basics.

Read data from a file is the correct answer to “What does the scan() function do in R”. This question is standard in competitive examination syllabi for R Programming Basics.

sqrt() is the correct answer to “What function is used to calculate the square root of a number in R”. This question is standard in competitive examination syllabi for R Programming Basics.

15 is the correct answer to “What is the result of sum(1:5) in R”. This question is standard in competitive examination syllabi for R Programming Basics.

max(vector) is the correct answer to “How is the maximum value of a numeric vector calculated in R using the max() function”. This question is standard in competitive examination syllabi for R Programming Basics.

Returns the number of elements is the correct answer to “What is the purpose of the length() function in R”. This question is standard in competitive examination syllabi for R Programming Basics.

seq(2, 10, by = 2) is the correct answer to “In R, how do you create a sequence of even numbers from 2 to 10”. This question is standard in competitive examination syllabi for R Programming Basics.

Arrange elements in ascending order is the correct answer to “What does the sort() function do in R”. This question is standard in competitive examination syllabi for R Programming Basics.

mean(vector) is the correct answer to “How do you calculate the mean of a numeric vector in R”. This question is standard in competitive examination syllabi for R Programming Basics.

min(vector) is the correct answer to “In R, how is the minimum value of a numeric vector calculated using the min() function”. This question is standard in competitive examination syllabi for R Programming Basics.

Reverse the order of elements is the correct answer to “What does the rev() function do in R”. This question is standard in competitive examination syllabi for R Programming Basics.

c(TRUE, FALSE, TRUE) is the correct answer to “How do you create a vector of logical values in R”. This question is standard in competitive examination syllabi for R Programming Basics.

Return the absolute values of elements is the correct answer to “In R, what does the abs() function do”. This question is standard in competitive examination syllabi for R Programming Basics.

Remove duplicate elements from a vector is the correct answer to “What is the purpose of the unique() function in R”. This question is standard in competitive examination syllabi for R Programming Basics.

c("apple", "banana", "cherry") is the correct answer to “How do you create a vector of characters in R”. This question is standard in competitive examination syllabi for R Programming Basics.

Numeric is the correct answer to “Decimal values are referred as . . . . . . . . data types in R.”. This question is standard in competitive examination syllabi for R Programming Basics.

c() is the correct answer to “The . . . . . . . . function can be used to create vectors of objects by concatenating things together.”. This question is standard in competitive examination syllabi for R Programming Basics.

Ordinal variable is the correct answer to “An ordered factor is used to represent an . . . . . . . .”. This question is standard in competitive examination syllabi for R Programming Basics.

Warning is the correct answer to “What will be the output of the following R code? x <- c("a", "b", "c") > as.numeric(x)”. This question is standard in competitive examination syllabi for R Programming Basics.

1 2 3 4 5 6 7 8 9 10 is the correct answer to “What will be the output of the following R code? > m <- 1:10 > m”. This question is standard in competitive examination syllabi for R Programming Basics.

Subsetting commands is the correct answer to “What should we use to access elements with a value greater than five”. This question is standard in competitive examination syllabi for R Programming Basics.

As.lists is the correct answer to “Lists can be coerced with which function”. This question is standard in competitive examination syllabi for R Programming Basics.

Second is the correct answer to “Which dimension corresponds to the explanatory variables collected for each species”. This question is standard in competitive examination syllabi for R Programming Basics.

2 3 is the correct answer to “What will be the output of the following R code? > m <- matrix(nrow = 2, ncol = 3) > dim(m)”. This question is standard in competitive examination syllabi for R Programming Basics.

no yes 2 3 is the correct answer to “What will be the output of the following R code? > x <- factor(c("yes", "yes", "no", "yes", "no")) > table(x)”. This question is standard in competitive examination syllabi for R Programming Basics.

> v <- 2*x + y + 1 is the correct answer to “Which of the following code constructs vector of length 11”. This question is standard in competitive examination syllabi for R Programming Basics.

Number of the position is the correct answer to “How can we access the first component of the list”. This question is standard in competitive examination syllabi for R Programming Basics.