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Perl Interview Questions

  • What arguments do you frequently use for the Perl interpreter and what do they mean?
  • What does the command ‘use strict’ do and why should you use it?
  • What do the symbols $ @ and % mean when prefixing a variable?
  • What elements of the Perl language could you use to structure your code to allow for maximum re-use and maximum readability?
  • What are the characteristics of a project that is well suited to Perl?
  • Why do you program in Perl?
  • Explain the difference between my and local.
  • Explain the difference between use and require.
  • What’s your favorite module and why?
  • What is a hash?
  • Write a simple (common) regular expression to match an IP address, e-mail address, city-state-zipcode combination.
  • What purpose does each of the following serve: -w, strict, -T ?
  • What is the difference between for & foreach, exec & system?
  • Where do you go for Perl help?
  • Name an instance where you used a CPAN module.
  • How do you open a file for writing?
  • How would you replace a char in string and how do you store the number of replacements?
  • When would you not use Perl for a project?

Check out Perl Monks for discussion of the questions and related Perl interview issues. Check RegExpLib for regular expression samples.

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