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






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






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






4. Does the hash key with "keyName" exists






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






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






7. < - > - == - <= - >= - !=






8. 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


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






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






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






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






13. Removes trailing newline






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






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






16. Remove trailing newline from each element in the array






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






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






19. Reverses the elements of the array






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






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






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






23. Delete the hash entry with the key given






24. _________ in perl - An associative array






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






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






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






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






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






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






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






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






33. Removes the first element of the array shift






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






35. Arrays can be assigned or read in _________






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






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






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






39. In arrays elements need not be __________






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






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






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






43. Split string into an array using spaces as delimeter






44. To write to a filehandle






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






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






47. 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






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






49. 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






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