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 use of "if" "if-else" and "if-elsif-else"






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






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






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






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






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






7. Removes trailing newline






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






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






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






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






12. _________ in perl - An associative array






13. Sort and array alphabetically






14. Does the hash key with "keyName" exists






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






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






17. Reverses the elements of the array






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






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






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






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






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






23. Arrays can be assigned or read in _________






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






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






26. 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






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






28. 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






29. < - > - == - <= - >= - !=






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






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






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






33. To write to a filehandle






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






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






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






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






38. Delete the hash entry with the key given






39. Split string into an array using spaces as delimeter






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






41. Returns the length of the string including escape sequences






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






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






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






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






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






47. 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


48. Removes the first element of the array shift






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






50. Remove trailing newline from each element in the array







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