What will be the output of the following R code?

> x <- as.Date("2012-01-01")
> y <- strptime("9 Jan 2011 11:34:21", "%d %b %Y %H:%M:%S")
> x-y

Which data structure in R is used to store an ordered collection of elements?

A. List

B. Matrix

C. Data Frame

D. Vector

What does the matrix() function create in R?

A. A list of elements

B. A one-dimensional array

C. A two-dimensional array

D. A data frame

In R, how do you create a list named my_list with three elements: 1, "hello", and TRUE?

A. my_list <- c(1, "hello", TRUE)

B. my_list = list(1, "hello", TRUE)

C. my_list(1, "hello", TRUE)

D. list(my_list = c(1, "hello", TRUE))

What is the primary data structure used for storing tabular data in R?

A. List

B. Matrix

C. Data Frame

D. Array