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






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






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






4. Reverses the elements of the array






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






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






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






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






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






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






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






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






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






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






15. 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






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






17. Split string into an array using spaces as delimeter






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






19. Sort and array alphabetically






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






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






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






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






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






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






26. Removes the last element from the array pop






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






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






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






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






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






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






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






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






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






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






37. 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






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






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






40. Returns the length of the string including escape sequences






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






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






43. 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


44. Removes the first element of the array shift






45. _________ in perl - An associative array






46. To write to a filehandle






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






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






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






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