Top 500 unique perl programming interview questions and answers to master in perl regular expression programs - part1

 

1. How can I remove leading and trailing white spaces from a string in Perl?

perl
1$str = " Hello World! ";
2$str =~ s/^\s+|\s+$//g;
3print $str; # Output: "Hello World!"

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write 1000 uniq perl interview questions and answers to master in perl part 2

 251. Q: In Perl, how can you find the position of a substring within a string?

1A: In Perl, you can find the position of a substring within a string by using the `index` function. Here is an example:
2
3```perl
4use strict;
5use warnings;
6
7my $string = 'Hello, World! World is beautiful.';
8my $substring = 'World';
9
10my $position = index $string, $substring;
11
12if ($position == -1) {
13    print "The substring was not found in the string.\n";
14} else {
15    print "The substring was found at position: $position\n";
16}
17```
18
19In this example, the script finds the position of the substring `'World'` within the string `'Hello, World! World is beautiful.'` and prints the resulting position.

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Perl - secure web services using Role-based access control

To secure Perl web services using Role-based access control (RBAC), you can define roles and permissions for different types of users, and restrict access to web service resources based on those roles and permissions. RBAC allows you to manage access to web services in a more granular way and provide a more fine-tuned security mechanism.

Here's an example of how you can implement RBAC for a Perl web service:

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