How to know whether a key exists or not in perl?


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More CGI Perl Interview Questions

Explain arrays in perl.

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What elements of the Perl language could you use to structure your code to allow for maximum re-use and maximum readability?

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What is boolean context?

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How do I replace every character in a file with a comma?

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If EXPR is an arbitrary expression, what is the difference between $Foo::{EXPR} and *{"Foo::".EXPR}?

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Explain perl. What are the advantages of programming in perl?

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What is the use of –w?

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Explain substr function in perl?

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Explain returning values from subroutines?

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Define perl scripting?

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Where the command line arguments are stored and if you want to read command-line arguments with Perl, how would you do that?

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What is -> symbol in perl?

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