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. Assignment of a hash variable for a single hash element






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






3. _________ in perl - An associative array






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






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






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






7. To include modules in perl






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






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






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






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






12. 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






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






14. Removes trailing newline






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






16. Reverses the elements of the array






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






18. Arrays can be assigned or read in _________






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






20. Remove trailing newline from each element in the array






21. 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






22. Split string into an array using spaces as delimeter






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






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






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






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






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






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






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






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






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






32. Removes the last element from the array pop






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






34. Removes the first element of the array shift






35. Sort and array alphabetically






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






37. To write to a filehandle






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






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. 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


41. Returns the length of the string including escape sequences






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






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






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






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






47. In arrays elements need not be __________






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






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






50. Does the hash key with "keyName" exists