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






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






3. Removes the first element of the array shift






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






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






6. Split string into an array using spaces as delimeter






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






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






9. Remove trailing newline from each element in the array






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






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






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






13. To write to a filehandle






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






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






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






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






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






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






20. Delete the hash entry with the key given






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






22. Reverses the elements of the array






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






24. _________ in perl - An associative array






25. Removes the last element from the array pop






26. < - > - == - <= - >= - !=






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






28. Returns the length of the string including escape sequences






29. 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






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






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






32. Sort and array alphabetically






33. 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






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






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






36. To include modules in perl






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






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






39. 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


40. Regular ____________: w - alphanumeric word including underscor - d - digits 0-9 - s any whitespace - . - any character






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






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






43. 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






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






45. Removes trailing newline






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






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






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






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






50. Arrays can be assigned or read in _________