Web Science/Part2: Emerging Web Properties/Simple statistical descriptive Models for the Web/Counting Words And Documents/quiz

1 How many words are in the following sentence? It is really really difficult to count words.

	6
	7
	8
	9

2 How many unique word tokens are in the following sentence? It is really really difficult to count words.

	6
	7
	8
	9

3 which of the following command line tools can be used to count words?

	cat
	ls
	wc
	tr