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 two phases of creating a PERL program _______ - Execution






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






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






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






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






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






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






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






9. In arrays elements need not be __________






10. To write to a filehandle






11. Sort and array alphabetically






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






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






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






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






16. Delete the hash entry with the key given






17. Arrays can be assigned or read in _________






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






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






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






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






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






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






24. 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


25. _________ in perl - An associative array






26. 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






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






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






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






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






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






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






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






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






35. Removes the last element from the array pop






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






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






38. Removes trailing newline






39. To include modules in perl






40. Split string into an array using spaces as delimeter






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






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






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






44. Returns the length of the string including escape sequences






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






46. Removes the first element of the array shift






47. Remove trailing newline from each element in the array






48. Does the hash key with "keyName" exists






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






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






Can you answer 50 questions in 15 minutes?



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