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






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






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






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






5. Arrays can be assigned or read in _________






6. Returns the length of the string including escape sequences






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






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






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






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






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






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






13. Removes trailing newline






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






15. 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






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






17. Reverses the elements of the array






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






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






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






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






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






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






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






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






26. Does the hash key with "keyName" exists






27. Removes the last element from the array pop






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






29. To write to a filehandle






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






31. 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






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






33. _________ in perl - An associative array






34. Removes the first element of the array shift






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






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






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






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






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






40. Split string into an array using spaces as delimeter






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






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






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






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






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






47. To include modules in perl






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






49. Remove trailing newline from each element in the array






50. 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