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






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






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






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






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






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






7. Remove trailing newline from each element in the array






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






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






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






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






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






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 phases of creating a PERL program _______ - Execution






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






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






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






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






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






20. To write to a filehandle






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






22. _________ in perl - An associative array






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






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






25. Arrays can be assigned or read in _________






26. 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






27. 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






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






29. To include modules in perl






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






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






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






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






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






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






36. Reverses the elements of the array






37. 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


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






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






40. Delete the hash entry with the key given






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






42. In arrays elements need not be __________






43. 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






44. Sort and array alphabetically






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






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






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






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






49. Split string into an array using spaces as delimeter






50. Removes the last element from the array pop