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Perl Programming

Subject : it-skills
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. To include modules in perl






2. _________ in perl - An associative array






3. The open() statement in perl: open(________, file_mode, "filename.txt")






4. Modules in perl - Synonymous with header files in C - Collection of ______ and variables that may be used in your program






5. Returns a copy of the string with the first letter lower case






6. Sort and array alphabetically






7. The variable that provides the last index of an array






8. Returns a copy of the string with the first letter upper case






9. _________ of scalar variables in perl - using "=" - Ex: $myVariable = 5;






10. _________ @arrayName) returns the size of the array






11. Returns a copy of the string as all lower case






12. Stores information about the current users environment. You can print this from the command line using printenv






13. scalar(@arrayName) returns the ______ of the array names






14. Returns a copy of the string as all upper case






15. Does the hash key with "keyName" exists






16. Swap keys for values and values for keys. Will cause issues if there are multiple hash entries with the same value






17. Returns all of the values of the hash as an array






18. Delete the hash entry with the key given






19. Returns the length of the string including escape sequences






20. Regular __________: * - 0 or more characters - + - 1 or more characters - ? - 0 or 1 characters






21. A special system variable used to pass arguments to script






22. Returns a two element ray of the next key value pair; resultArray[0] is the key resultArray[1] is the value






23. < - > - == - <= - >= - !=






24. Remove trailing newline from each element in the array






25. Common ________: keys(%hash) - values(%hash) - each(%hash) - delete($hash{keyName}) - exists($hash{keyName}) - reverse(%hash)






26. Removes the last element from the array pop






27. Assignment of a hash variable for a single hash element






28. The three basic ________ of the open() function: > write - >> append - < read file






29. $#arrayName returns the value of the ______ of the array (NOT the data stored in that array element)






30. Common ________: pop(@array) - push(@array, $new Value) - shift(@array) - unshift(@array, $newValue) - sort(@array) - reverse(@array)






31. To get rid of the ________ in $line you could now chomp() (Ex: chomp($line);)






32. Common ___________: substr($string, $start, $numchars); - length($string) - lc($string) - uc($string) - chomp($string) - chomp(@string) - join(':", @string) - split(/\s/, $string) - lcfirst($string) - ucfirst($string)






33. Explain how to read a line from a file handle






34. Reverses the elements of the array






35. The purpose of {} in an "if" statement: To Define the __________ of the if statement. Unlike C the {} braces ARE REQUIRED






36. _________ in perl - Singular variable - starts with "$" - Number or characer or string- Perl does automatic type conversion of these






37. The two phases of creating a PERL program _______ - Execution






38. The use of ______ in perl - Documenting code - Created by placing a "#" on a line. - are not multi-line






39. Returns all of the keys of the hash as an array






40. _________ $#arrayName give value of last index available in the array. Ex an array of size 5 will have its $#arrayName = 4






41. Add a new element to the from of the array with the value $newwValue






42. Join the elements of the array seperating the elements with the ':' character

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


43. The two primary methods of executing _______ in perl: - system("command args") - - `command args`






44. The four types of loops in perl: while - until - for - ________






45. ________ in perl - can be scalar array or hash context - tells the interpreter what you are looking for (Ex: "$arrayname[$index_number]")






46. The __________ in perl: - uses grave marks `command args`- returns the output of the command to the variable you specify - if $output = `command arg` the output is stored all in one variable (all lines seperated by n) - if @output = `command arg` the






47. Adds a new element to end of the array with value $newValue






48. In arrays elements need not be __________






49. eq - ne - lt - le - gt - ge






50. The use of "if" "if-else" and "if-elsif-else"







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