R Language Quiz

In what year was Version 4 of the S language released, which is the version used today?

• 1988

• 1993

• 1998

• 2004

Which company serves as the current owner and exclusive developer of the S language?

• Bell Labs

• StatSci

• Insightful Corp.

• TIBCO

Among the following, identify an object class that is not considered one of the five basic or "atomic" classes in R.

• numeric

• string

• integer

• logical

Which symbol functions as the assignment operator in R?

• =

• <-

• ->

• +

What is the sole character used to denote a comment in R?

• //

• /* */

• #

• --

What fundamental rule governs the composition of vectors in R?

• A vector can contain objects of different classes.

• A vector can only contain objects of the same class.

• Vectors must always be explicitly initialized with vector().

• Vectors can only store numeric data.

How does one explicitly designate an integer object in R (e.g., the number 1)?

• as.integer(1)

• integer(1)

• 1L

• int(1)

What does the value NaN signify in R?

• Negative infinity

• Not a number

• A null value

• A zero value

Which R object type is described as a "special type of vector that can contain elements of different classes"?

• Matrix

• Data Frame

• Factor

• List

When importing larger datasets using read.table(), what benefit arises from employing the colClasses argument?

• It ensures R reads the entire file by default.

• It prevents R from incorrectly guessing column types.

• It automatically sets the comment character.

• It speeds up the data writing process.