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






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






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






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






5. 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






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






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






8. 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






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






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






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






12. Sort and array alphabetically






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






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






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






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






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






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






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






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






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






22. Split string into an array using spaces as delimeter






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






24. _________ in perl - An associative array






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






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






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






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






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






30. 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


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






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






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






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






35. Arrays can be assigned or read in _________






36. Removes the first element of the array shift






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






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






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






40. To write to a filehandle






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






42. Removes the last element from the array pop






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






44. 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






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






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






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






48. Delete the hash entry with the key given






49. Reverses the elements of the array






50. Removes trailing newline