What are stdin, stdout and stderr?
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how to find a substring in a string without using substr built in functions, and print the substring found
Differences between die and exit.
How can you call a subroutine and identify a subroutine?
How to read a directory in perl?
How to read from a pipeline with Perl
What's the difference between /^Foo/s and /^Foo/?
What are the features of perl language?
What is the difference between for & foreach, exec & system?
Explain different types of perl operators.
What is perl unshift array function?
What is the closure in PERL?
What is the purpose of “_file_ literal” and “_line_ literal” in perl?