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. Removes the first element of the array shift






2. Removes the last element from the array pop






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






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






5. 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






6. Delete the hash entry with the key given






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






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






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






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






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






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






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






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






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






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






17. 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






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






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






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






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






22. Remove trailing newline from each element in the array






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






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






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






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






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






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






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






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






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






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






33. Returns the length of the string including escape sequences






34. To include modules in perl






35. 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






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






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






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






39. Does the hash key with "keyName" exists






40. In arrays elements need not be __________






41. _________ in perl - An associative array






42. Arrays can be assigned or read in _________






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






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






45. 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


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






47. < - > - == - <= - >= - !=






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






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






50. To write to a filehandle