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What are the characteristics of project that is well suited to PERL
ashwini chavan
- Jul 22nd, 2008
When to use Perl1. For large text processing2. When application does lot of data manipulation3. When you need fast development4. For database loading operations5. When shell scrits grow to become libraries
bibhu prasanna behera
- Jun 25th, 2007
Actually it is used in automation testing....as a tester i am using per script for automation testing like running the tools etc.
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What is eval in perl?
sapam
- Apr 1st, 2008
The eval function provides a very simple way of checking certain events without affecting the overall execution of your script. In essence, the eval function just initiates a new instance of the Perl ...
acraul7
- Mar 5th, 2008
Eval is also used for evaluating expressions.For eg:$a = 1;$b = 3;$c = '$a*$b';print(eval "$c"); // This prints 3
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How to substitute a particular string in a file containing millions of records?
ratul2783
- May 3rd, 2010
perl -p -i -e "s/search_string/replace_string/g" SourceFileThe -p option ensures that $_ is assigned each line of each input file in turn and that the program is executed once for each input line.The ...
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How to find type of variable?
How to find out whether reference is pointing to a scalar, array or hash?
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What is difference between "Use" and "require". In which case should "Use" be used and not "Require"?
gireeshkumar.kg
- Jun 29th, 2009
1)Usei) use for loading the modules( Should not give the .pm extension)ii) The loaded module is verified at the compile time.2) Requirei) Use for loading the modules and perl programs( .pm extension i...
prabhasgupte
- Feb 12th, 2008
There is one more basic difference between 'use' and 'require'.When you 'use' the control is passed to that file at runtime.Whereas, when you 'require' the code from th...
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What does this mean : '$_' ?
ashwini chavan
- Jul 22nd, 2008
The most commonly used global scalar variable is the $_ variable. Many Perl functionsand operators modify the contents of $_ if you do not explicitly specify the scalarvariable on which they are to op...
prabhath_01
- May 31st, 2008
It is called as default variable in Perl.It hold the current value in any block ie., 'for' or 'while'. Eg.,******************************************print "n", $_ for (1..10)...
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What does this symbol mean '->'
prabhath_01
- May 31st, 2008
Uses of "->" Operator:###################1) Reference the method of a module.use CGI;my $cgi = new CGI ();$cgi->header();2) In Perl it is an infix dereference operator. $arr = [ ...
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What is the difference between a perl program and a shell script? Which out of these is easier to understand and execute? And How?
sandeep
- Oct 23rd, 2015
Are you sure that its necessary to provide semicolon.
Because I have tried it and it works without them also.rahulashu
- Jun 10th, 2008
if the number of functionality is no more then we can go for the unix but if u are working for database connectivity...
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What's is the use of 'require' and what does this mean?
nitashaa
- Jul 15th, 2008
require function is used to load a seperate perl script or module in run time.If the file to be loaded is not in the directories listed in @INC array then full path of the perl file is to be passed in...
Swanand
- Mar 27th, 2007
'require' is like a preprocessor directive in C/C++ which imports the external file .You can use the subroutines inside the current source code which are defined in the external file.require 'coreDBlib.pl'?=>> #include
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What is hash in perl?
ashwini chavan
- Jul 22nd, 2008
Hash is an associative array where data is stored in "key"->"value" pairs.Eg : fruits is a hash having their names and price%fruits = ("Apple", "60", "Banana", "20", "Peers", "40");
wow_suraj
- May 2nd, 2008
Hash is also known as 'Associative array' sometimes. It basicaly contains of two parts first is key and value. It is very much like a name given for a value.Ex. A student with his/her roll number can ...
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What is Grep used for in Perl?
vasu
- Dec 19th, 2011
Code- #!/usr/bin/perl
- /^m(.*)$/i"the value is :""
- ";
- }
contactparagm
- Dec 3rd, 2010
"grep" is a built function which extract all elements in ARRAY, matched by regex/pattern given as argument for grep and return the resultant elements in an array.perl syntax: &nbs...
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How do you you check the return code of a command in Perl
Suppose you run a program/script in Perl:system("./server ....");How will you check the return code?
contactparagm
- Dec 3rd, 2010
Perl defines predefined variable $? which gives the return code of last command executed.
amitkshirsagar
- Jun 22nd, 2009
$r = system("command .. e.g. search");print"r is $rn";Here, if $r is 0, that means command has executed successfully.Any other value means command has failed.
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Why do you program in PERL
gireeshkumar.kg
- Jun 29th, 2009
* PERL is programmer friendly. It is easy to code and can do it in less number of lines. It does all the nice things with minimum fuzz.* Text manipulation is unmatched. * It has built-in regex.* Has the support of world's largest archive of modules(CPAN)
ashwini chavan
- Jul 22nd, 2008
It is having the features of scripting (Shell) as well as programming (like C). Using PERL you can easily do the system administration works where comparitively difficult with Shell script.
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How to implement stack in Perl?
shah
- May 16th, 2018
Its wrong sangeeta. To implement a stack in perl, we have to use push and pop function, push will add an element at the end of array and pop will remove the element from the end of array
singh_Pushpendra
- Aug 13th, 2010
#! /usr/bin/perl -w$str1="Pushpendra Singh";@str=split("", $str1);@stack_array=();foreach $i (@str){ print "nt Item being pushed is : $i"; push(@stack_a...
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What is -> Symbol in perl
soumdgr8
- Aug 1st, 2015
Is used for chaining elements of a reference type. The element can be another reference, scalar, array, function, object
shalusanju
- Aug 13th, 2010
In object oriented PERL, the arrow -> symbol is used for creating or accessing a particular object of a class. For eg. in Perl/Tk 1. use Tk; my $main_win = MainWindow->new(); Here we u...
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Install Perl module using CPAN
How to install Perl module using CPAN. How to include the module in a program?
ankitloud
- Nov 20th, 2011
I think the best option will be : type following command on command prompt
cpan App::cpanminus then you can install any module using its name using following command
cpan Module::Apache
let me know if it doesn't workNavshere
- Aug 19th, 2011
Perl Makefile.PL
nmake
nmake test
nmake install
# To check successive installation
perl -e "use Twig" -
Perl Code
1) Input ip address. Check if it is in the range 172.125.1.0 and 172.125.25.0 using only regular expressions in Perl. Do not use parse functions.
2) Input a name. Check if it is valid (has at-least 3 letters and one vowel) using only return functions and regular expressions in Perl. Do not use parse functions.
3) Input email address. Check if it is valid using return function...josepla
- Jan 11th, 2017
using regex for all 3 questions IP, Name and Email"perl use v5.24; use utf8; use open :std, :encoding(cp437); # Encoding used by console, to check console type in Windows cmd us...
praveen
- Nov 29th, 2016
$ip=;
chomp($ip);
if ($ip =~ /^172.125.([1-9]|1[1-9]|2[1-5]).0/){print "$ip in range
" ;}
else{print "$ip not in range
"};
Perl Interview Questions
Ans