Answer Posted / savitha sridhar

-w to enable warnings mode
-T to enable Taint mode (TAINT mode puts a Perl script
into "PARANOID" mode and treats ALL user supplied input as
tainted and bad unless the programmer explicitly "OKs" the
data). Usually used when you are using a perl script that
you have downloaded and running but do not want any
security problems.

strict is a pragma in perl used to incorporate strict
programming practices.
Eg:

you could have written a small prog like this:

$x=100;
print $x;

with strict pragma "ON" you will be explicitly required to
specify the scope like,

use strict;
my $x=100; ##use of my to specify scope
print $x;

You can also switch off a pragma by using "no" like below
to switch off the pragma effect:

use strict;
my $x=100; ##use of my to specify scope
print $x;
no strict;
$y=200; ##no need to be specific
print $y;

Explain about the applications of perl?

910

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Write a script to reverse a string without using perl's built in functions?

924

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What is perl programming?

955

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How to close a directory in perl?

869

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How will you get the count of parameters passed to a perl subroutine?

881

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Explain the internal working of cgi

883

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How do I read command-line arguments with Perl?

962

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What is confess function in perl?

891

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Explain the execution of a program in perl.

920

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what is the function of Return Value?

995

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Explain what is the scalar data and scalar variables in Perl?

895

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What value is returned by a lone `return;’ statement?

1003

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How to create a directory in perl?

990

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You want to concatenate strings with perl. How would you do that?

818

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Define operators used in perl?

880

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