Which of the following tasks is the least effective in reducing errors in Perl scripts?

Which one of the following while statements uses correct syntax and expressions?

Consider the following program code:
$x = 5;
$y = 10;
while(++$x < 10 && ++$y < 15)
{
print ($x $y );
}
print ($x $y );
What is the result of executing this program code?

Which of the following methods of calling a subroutine is not valid?

Consider the program code in the attached exhibit.

What is the result of executing this program code?

Consider the following program code:
if (“Apple” gt “Pear”)
{
print(“True “);
}
else
{
print(“False “);
}

if (“Banana” le “Banana”)
{
print(“True “);
}
else
{
print(“False “);
}
What is the result of executing this program code?

In Perl, packages are used for which task?

Consider the following program code:
if (“cool” =~ m/[cool]{4}/)
{
print(“True “);
}
else
{
print(“False “);
}

if (“cool” =~ m/[col]{4}/)
{
print(“True “);
}
else
{
print(“False “);
}
What is the output of this code?