Linux OS Shell Question:

The expression expr -9 % 2 evaluates to:
a) 0
b) 1
c) -1
d) 2

c) -1

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What is the output of the following program? x = 3; y = 5; z = 10; if [( $x -eq 3 ) -a ( $y -eq 5 -o $z -eq 10 )] then echo $x else echo $y fi a) 1 b) 3 c) 5 d) Error	What is the output of the following program? b = [ -n $b ] echo $? [ -z $b ] echo $? a) 1 1 b) 2 2 c) 0 0 d) 0 1