Question

The ________ for R are the main feature that make it different from the original S language.

(a) scoping rules

(b) closure rules

(c) environment rules

(d) closure & environment rules

I got this question by my college director while I was bunking the class.

Query is from Scoping Rules topic in section Control Structures, Functions, Scoping Rules, Loop Functions and Debugging of R Programming

Answer 1

The correct answer is (a) scoping rules

For explanation I would say: This function never actually uses the argument b, so calling f(2) will not produce an error because the 2 gets positionally matched to a.