Question

Point out the correct statement?

(a) gather() makes “long” data wider

(b) tidyr is a reframing of reshape designed to accompany the tidy data framework

(c) there are two fundamental verbs of data tidying

(d) tidyr and dplyr packages do not make use of the pipe operator

I got this question by my school principal while I was bunking the class.

Question is taken from Data Wrangling topic in section Profiling, Simulation and Data Analysis of R Programming

Answer 1

Correct answer is (c) there are two fundamental verbs of data tidying

To elaborate: In particular, built-in methods only work for data frames, and tidyr provides no margins or aggregation.