CSC 209: midterm solutions, March 2011

2. What is the output on stdout from typing the following commands to sh?

	a=3
	b=4
	c=5
	expr $a + $b$c

	echo hello | wc -c
	(echo hello; echo goodbye) | wc -l
	(echo hello; echo goodbye) | sort

(recall that "wc -c" counts characters (bytes) and "wc -l" counts lines)

Note: If you don't understand the supplied answer, please actually try the commands, and experiment from there.

       6
       2
goodbye
hello

(the indentation of the 6 and 2 was ignored in grading, of course)