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. To include modules in perl






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






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






4. < - > - == - <= - >= - !=






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






6. Returns the length of the string including escape sequences






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






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






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






10. Remove trailing newline from each element in the array






11. To write to a filehandle






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






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






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






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






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






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






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






19. Arrays can be assigned or read in _________






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






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






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






23. _________ in perl - An associative array






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






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






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






27. 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


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






29. Does the hash key with "keyName" exists






30. Removes the last element from the array pop






31. Sort and array alphabetically






32. 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






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






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






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






36. Split string into an array using spaces as delimeter






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






38. Removes trailing newline






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






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






41. 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






42. Removes the first element of the array shift






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






44. Reverses the elements of the array






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






46. Delete the hash entry with the key given






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






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






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






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