R variable Data Type and Flow Control Quiz

What is the correct way to assign a value to a variable in R?

• x <- 5

• x = 5

• 5 -> x

• All of the above

Which function is used to check the type of a variable in R?

• typeof()

• type()

• variable_type()

• None of the above

Which of the following is true about variables in R?

• Variables cannot store multiple data types.

• Variables are case-sensitive.

• Variable names can start with a number.

• Variables name can have _

What is the correct way to create a numeric vector in R?

• vector(1, 2, 3)

• [1, 2, 3]

• num(1, 2, 3)

• c(1, 2, 3)

What will be the output of the following code?

• Error

• 1, 2, 3

• 2, 4, 6

• 3, 4, 5

Which of the following correctly creates a list in R?

• list("a", 1, TRUE)

• c("a", 1, TRUE)

• ("a", 1, TRUE)

• None

How do you access the third element of my_list as a List in R?

• my_list[3]

• my_list[[3]]

• my_list$3

• my_list(3)

What function is used to create a matrix in R?

• create_matrix()

• array()

• mat()

• matrix()

How do you access the element in the second row and third column of a matrix mat?

• mat[2, 2]

• mat[[2, 3]]

• mat[2][3]

• mat[2, 3]

What will be the output of the following code?

• [1] 1 2 3

• [1] 7 8 9

• [1] 4 5 6

• None of the above