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. Returns the length of the string including escape sequences






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






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






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






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






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






7. Does the hash key with "keyName" exists






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






9. Reverses the elements of the array






10. In arrays elements need not be __________






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






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






13. Returns the sub string starting at index $startindex and ending after $numchars chars in the string $string






14. Sort and array alphabetically






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






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






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






18. To write to a filehandle






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






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






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






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






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






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






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






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






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






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






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






30. 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






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






32. _________ in perl - An associative array






33. 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


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






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






36. The _______ in perl: - used to execute an external command - will output results of command to terminal - returns the exit status of the program that ran - use this for commands that you dont care about SAVING the output to a variable






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






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






39. Arrays can be assigned or read in _________






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






41. 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






42. Remove trailing newline from each element in the array






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






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






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






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






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






48. Removes the last element from the array pop






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






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