I have one question regarding to eval function. I know eval function is use for error checking but I am not able to understand below line. eval \'exec perl -S $0 ${1+\"$@\"}\' if 0; $0 for script name $@ set if error occur

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What are hashes?

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Explain what is STDIN, STDOUT and STDERR?

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What is stdin in perl?

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How would you replace a char in string and how do you store the number of replacements?

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What is perl scripting?

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Explain the difference between my and local?

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What is the difference between single (') and double (") quote in a string in perl?

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Consider the following example #! /bin/perl use strict; sub sample { my @arr=(1,2,3,4); return @arr; } my ($a,$b,$c,$d) = &sample; print "$a\n$b\n$c\n$d\n"; In the above code, How can I get the $c without using the arguments such as $a,$b. I don't want to use any array to get the return values.

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You want to open and read data files with perl. How would you do that?

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Why does Perl not have overloaded functions?

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What are the reasons that cookie server can’t handle multiple connections?

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