Question

The dimension attribute is itself an integer vector of length _______

(a) 1

(b) 2

(c) 3

(d) 4

I had been asked this question during an interview for a job.

Question is taken from Overview of R in division History, Overview and Getting Started of R Programming

Answer 1

The correct option is (b) 2

To explain I would say: It is itself an integer vector of length 2. The dimension attribute in R is an integer vector. Real values larger in modulus than the largest integer are coerced to NA. Matrices are vectors with a dimension attribute. The dimension attribute is itself an integer vector of length 2 (number of rows, number of columns).