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 a copy of the string as all upper case






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






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






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






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






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






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






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






9. Arrays can be assigned or read in _________






10. 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






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






12. Removes the last element from the array pop






13. Split string into an array using spaces as delimeter






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






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






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






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






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






19. Delete the hash entry with the key given






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






21. _________ in perl - An associative array






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






23. Does the hash key with "keyName" exists






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






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






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






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






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






29. 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


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






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






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






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






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






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






37. 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






38. Removes the first element of the array shift






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






40. In arrays elements need not be __________






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






42. Returns the length of the string including escape sequences






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






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






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






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






47. Reverses the elements of the array






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






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






50. To write to a filehandle