Question

Data frames can have additional attributes such as __________

(a) Rowname()

(b) Rownames()

(c) R.names()

(d) D.names()

This question was addressed to me at a job interview.

I want to ask this question from Data Types topic in division Nuts and Bolts and Getting Data In and Out of R Programming

Answer 1

Right option is (b) Rownames()

To explain I would say: Data frames can have additional attributes such as rownames(), which can be useful for annotating data, like subject_id or sample_id. But most of the time they are not used. A data frame is an important data type in R.