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Perl Programming Interview Questions Answers

    Perl Programming Interview Questions Answers

    1. Does Perl have reference type?
    2. How do I do < fill-in-the-blank > for each element in a hash?
    3. How do I do < fill-in-the-blank > for each element in an array?
    4. How do I do fill_in_the_blank for each file in a directory?
    5. How do I generate a list of all .html files in a directory?
    6. How do I print the entire contents of an array with Perl?


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    8. How do I read command-line arguments with Perl?
    9. How do I replace every character in a file with a comma?
    10. How do I send e-mail from a Perl/CGI program on a Unix system?
    11. How do I set environment variables in Perl programs?
    12. How do I sort a hash by the hash key?
    13. How do I sort a hash by the hash value?
    14. How do you find the length of an array?
    15. How do you give functions private variables that retain their values between calls?
    16. How do you match one letter in the current locale?


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    18. How do you print out the next line from a filehandle with all its bytes reversed?
    19. How many ways can we express string in Perl?
    20. How to concatenate strings with Perl?
    21. How to dereference a reference?
    22. How to open and read data files with Perl
    23. How to read file into hash array ?
    24. How to read from a pipeline with Perl
    25. How to turn on Perl warnings? Why is that important?
    26. If EXPR is an arbitrary expression, what is the difference between $Foo::{EXPR} and *{"Foo::".EXPR}?
    27. Perl uses single or double quotes to surround a zero or more characters. Are the single(' ') or double quotes (" ") identical?
    28. What are scalar data and scalar variables?
    29. What does Perl do if you try to exploit the execve(2) race involving setuid scripts?
    30. What does `$result = f() .. g()' really return?
    31. What does `new $cur->{LINK}' do? (Assume the current package has no new() function of its own.)
    32. What does length(%HASH) produce if you have thirty-seven random keys in a newly created hash?
    33. What does read() return at end of file?
    34. What happens to objects lost in "unreachable" memory..... ?
    35. What happens when you return a reference to a private variable?
    36. What is the easiest way to download the contents of a URL with Perl?
    37. What value is returned by a lone `return;' statement?
    38. What's the difference between /^Foo/s and /^Foo/?
    39. When would `local $_' in a function ruin your day?
    40. Which of these is a difference between C++ and Perl?
    41. Why aren't Perl's patterns regular expressions?
    42. Why do you use Perl?
    43. Why does Perl not have overloaded functions?
    44. Why is it hard to call this function: sub y { "because" }
    45. Why should I use the -w argument with my Perl programs?

    Perl Programming Interview Questions Answers

    Object Oriented Perl, Perl Script, Perl Wild Card, Perl Asp Net, Perl Command Line


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