Important R Programming Quiz 19 - R Language and Statistics

The Quiz is about R Programming Quiz with Answers. There are 20 multiple-choice questions covering different topics related to R Language Programming. Let us start with the R Programming Quiz now.

Online R Programming Quiz with Answers

What is the main reason for using the R language?
In R, what is the result of the function as.numeric(TRUE)?
In R, variables are typically assigned using <-, but they can also be assigned using which of the following symbols?
Which command in R would return the following character vector? “Imdad” “Usman” “Ali” “Amir”
In R, assume you have a vector named “age,” and each element in the vector is the age of one person in a group. The vector has the following content: 24 32 46 19. What will be the result if you issue the age[-2] command?
Assume the array books_array contains 6 elements. The array has three rows and two columns and appears as follows:

    [,1]         [,2]
[1,] “It”              “Dr. Sleep”
[2,] “Misery”          “Carrie”
[3,] “The Shining”   “The Mist”

Which of the following commands will return “The Shining”?

In R language, which command returns the last six elements of a data object such as a data frame?
Assume that the function add is defined as follows:
add <- function(x,y) {
(x + y)
return (x – y)
temp <<- (x * y)
return (x / y)
}
What will be the output if you issue the command add(10,5)?
What is the first step you must take before you can read an Excel spreadsheet in R?
After installing and calling the httr library in R, which method should you use to update a resource?
In R, what is the result of the function as.integer(3.3)?
In R, which command removes a variable from memory?
In R, assume a character vector called “names” has the following contents: “Harry” “Jimmy” “Tammy” Which command would return the following logical vector? FALSE TRUE FALSE
In R, assume you have a vector named “age,” and each element in the vector is the age of one person in a group. Which command must you use to reorder the ages from youngest to oldest?
In R, which command will output the data from the Nile built-in data set?
In R, which command should you use to insert a new row into a data frame?
To perform a one-way Analysis of variance, one can use a function
How many elements will be in vector $b$, if b <- 10:15
All columns in a matrix must have the
For a matrix $X$ of order $n\times p$ and a vector $Y$ of order $n\times 1$, one can find regression coefficients using