Test your basic knowledge |

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. Delete the hash entry with the key given






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






3. Removes trailing newline






4. Removes the last element from the array pop






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






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






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






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






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






10. In arrays elements need not be __________






11. 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






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






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






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






15. < - > - == - <= - >= - !=






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






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






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






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






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






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






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






23. _________ in perl - An associative array






24. Sort and array alphabetically






25. Returns the length of the string including escape sequences






26. Does the hash key with "keyName" exists






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






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






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






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






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






32. Removes the first element of the array shift






33. Split string into an array using spaces as delimeter






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






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






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






37. Arrays can be assigned or read in _________






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






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






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






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






42. Remove trailing newline from each element in the array






43. 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






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






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






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






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






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






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






50. To include modules in perl