Explain Perl and Mod Perl?

Perl:

CGI scripts can be developed  in  most  programming languages,  the only  restriction  is the web server  must  be  able to  execute  the  script.

 The  most  popular  languages  for CGI   development  are perl, V,B,C  is  java.

1)    CGI  scripts  tend  to be  simple.

2)    CGI  involves  the  manipulation   of  text  strings  perl  was  specifically developed  to  handle text.

3)    Perl  is freely and  widely available.

4)    There  is a mass  of  helpful  information  available  from world  wide  web sites.

The  current version of perl 5  which  was a  major  rewrite  from  version  4.

Using  perl  writing, debugging  and  testing CGI scripts  on  remote  server.

Before  trying   to  install your  own copy of  peral check  that  you haven’t already  got  One  available.

If  you use  the  unix o/s  on an   institutional  machine  or  pc running  Linix  then  the chances  are  that  you  already  have  perl.

To check simply  open terminal  (command  prompt)  and  type

Perl  -V

If you have  perl, then  a few  lines  of  version  Information will  be  displayed.
  

MOD – PERL:

The  most   important  words   in web  development  must  be  security  and  performance.

When you  write  a  perl script  for  a  CGI  server, you  don’t    have  to  compile  it.

When  a  user  requests   your script  the web  server  starts the  perl interpreter  which  loads Your script  is  internally  compiles  it  to byte code.

The  developers  is users  of the  Apache  web server  have  provide  a number  of  optional  modules  which  can  be  used  to  extend  and  improve  the  capabilities    of that server.

The mod- perl module works  by  loading the perl  interpreter  in  to  memory   just  once And then keeping  it  there.

As each  script  is  required  it  is  compiled  and also loaded  in to memory.

Perl  is  a  truly platform- independent  language.

Asp  technology  runs only  on   IIS   is  that requires  windows.

If  you  want  speed, scalability  and  platform  independence  then  Apache, mod-perl    and Perl  is the  best  way  to  develop   server-side  web   applications.

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