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






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






3. Sort and array alphabetically






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






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






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






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






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






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






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






11. To write to a filehandle






12. Removes the first element of the array shift






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






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






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






16. Delete the hash entry with the key given






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






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






19. 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






20. To include modules in perl






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






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






23. Removes the last element from the array pop






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






25. _________ in perl - An associative array






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






27. Remove trailing newline from each element in the array






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






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






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






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






32. Split string into an array using spaces as delimeter






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






34. 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






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. The variable that provides the last index of an array






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






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






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






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






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






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






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






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






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






46. Returns the length of the string including escape sequences






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






48. 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


49. In arrays elements need not be __________






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