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






2. To write to a filehandle






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






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






5. Split string into an array using spaces as delimeter






6. 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






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






8. _________ in perl - An associative array






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






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






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






12. Sort and array alphabetically






13. Removes the first element of the array shift






14. Arrays can be assigned or read in _________






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






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






17. 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


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






19. In arrays elements need not be __________






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






21. Remove trailing newline from each element in the array






22. To include modules in perl






23. Returns the length of the string including escape sequences






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






25. Removes trailing newline






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






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






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






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






30. Removes the last element from the array pop






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






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






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






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






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






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






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






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






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






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






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






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






43. Delete the hash entry with the key given






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






45. 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






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






47. Reverses the elements of the array






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






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






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