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. Returns a copy of the string as all upper case






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






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






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






6. To include modules in perl






7. In arrays elements need not be __________






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






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






10. Remove trailing newline from each element in the array






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






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






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






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






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






17. 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


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






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






20. To write to a filehandle






21. Split string into an array using spaces as delimeter






22. Does the hash key with "keyName" exists






23. Sort and array alphabetically






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






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






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






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






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






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






30. 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






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






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






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






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






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






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






37. Removes the last element from the array pop






38. _________ in perl - An associative array






39. Reverses the elements of the array






40. Removes the first element of the array shift






41. Returns the length of the string including escape sequences






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






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






44. Removes trailing newline






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






46. < - > - == - <= - >= - !=






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






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






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






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







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Can you answer 50 questions in 15 minutes?


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