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. Reverses the elements of the array






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






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






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






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






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






7. To write to a filehandle






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






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






10. To include modules in perl






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






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






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






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






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






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






17. Split string into an array using spaces as delimeter






18. 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


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






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






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






22. Returns the length of the string including escape sequences






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






24. Delete the hash entry with the key given






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






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






27. 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






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






29. Removes the first element of the array shift






30. In arrays elements need not be __________






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






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






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






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






35. _________ in perl - An associative array






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






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






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






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






40. < - > - == - <= - >= - !=






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






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






43. 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






44. Removes the last element from the array pop






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






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






47. Removes trailing newline






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






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






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