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 lower case






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






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






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






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






6. In arrays elements need not be __________






7. Returns the length of the string including escape sequences






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






9. 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






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






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






12. 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






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






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






15. Removes trailing newline






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






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






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






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






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






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






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






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






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






26. Removes the last element from the array pop






27. Does the hash key with "keyName" exists






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






29. < - > - == - <= - >= - !=






30. Reverses the elements of the array






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






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






33. Arrays can be assigned or read in _________






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






35. 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






36. Removes the first element of the array shift






37. Sort and array alphabetically






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






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






40. Split string into an array using spaces as delimeter






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






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






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






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






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






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






47. To include modules in perl






48. To write to a filehandle






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






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






Can you answer 50 questions in 15 minutes?



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