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 all of the values of the hash as an array






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






3. Arrays can be assigned or read in _________






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






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






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






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






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






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






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






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






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






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






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






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






16. Removes the first element of the array shift






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






18. 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






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






20. In arrays elements need not be __________






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






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






23. < - > - == - <= - >= - !=






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






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






26. Remove trailing newline from each element in the array






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






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






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






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






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






32. Delete the hash entry with the key given






33. 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






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






35. Returns the length of the string including escape sequences






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






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






38. _________ in perl - An associative array






39. 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


40. To write to a filehandle






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






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






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






44. Does the hash key with "keyName" exists






45. Split string into an array using spaces as delimeter






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






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






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






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






50. Removes trailing newline







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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