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






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






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






4. < - > - == - <= - >= - !=






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






6. Two ____________ in regular expressions: =~ Contains - !~ Does not contain






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






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






9. Removes the first element of the array shift






10. To read an entire file into an array (one line per element)






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






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






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






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






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






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






17. Split string into an array using spaces as delimeter






18. Removes the last element from the array pop






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






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






21. 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


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






23. Remove trailing newline from each element in the array






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






25. Does the hash key with "keyName" exists






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






27. 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






28. _________ in perl - An associative array






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






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






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






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






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






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






35. In perl the _______ will recognize syntax errors and halt execution BEFORE it begins - and will output statements; it does not understand and the line which it encountered the error on






36. Reverses the elements of the array






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






38. Delete the hash entry with the key given






39. ________ in perl - A collection of data (static data or scalar variables or arrays or hashes can all be stored in an array element)






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






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






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






43. Removes trailing newline






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






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






46. Assignment of hash variables in perl (when oringally defining the hash)






47. To include modules in perl






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






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






50. Returns the length of the string including escape sequences







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Can you answer 50 questions in 15 minutes?


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