1D0-437 Exam Dumps : CIW PERL FUNDAMENTALS

Which one of the following choices is a unary operator that can apply to only a single variable?

Consider the following program code:

%color = (sun => yellow, apple => red);

reverse(%color);

@colorKeys = sort(keys(%color));

foreach(@colorKeys)

{

print($color{$_} . );

}

What is the result of executing this program code?

Consider the following program code:

1.$x = 100;

2.$y = "-25";

3.$sum = $x + $y;

4.

5.print $sum;

What is the result of executing this program code?