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






2. Does the hash key with "keyName" exists






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






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






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






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






7. Split string into an array using spaces as delimeter






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. Removes trailing newline






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






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






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






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






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






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






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






17. Reverses the elements of the array






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






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






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






21. Removes the first element of the array shift






22. Returns the length of the string including escape sequences






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






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






25. Sort and array alphabetically






26. Delete the hash entry with the key given






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






28. _________ in perl - An associative array






29. Remove trailing newline from each element in the array






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






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






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






33. Removes the last element from the array pop






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






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






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






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






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






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






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






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






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






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






44. 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






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






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






47. To include modules in perl






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






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






50. Arrays can be assigned or read in _________