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






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






3. Reverses the elements of the array






4. Returns the length of the string including escape sequences






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






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






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






8. To write to a filehandle






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






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






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






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






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






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






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






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






17. Sort and array alphabetically






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






19. 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






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






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






22. 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






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






24. 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






25. Removes the first element of the array shift






26. Arrays can be assigned or read in _________






27. In arrays elements need not be __________






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






29. Does the hash key with "keyName" exists






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






31. Remove trailing newline from each element in the array






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






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






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






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






36. 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


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






38. Delete the hash entry with the key given






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






40. _________ in perl - An associative array






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






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






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






44. Removes the last element from the array pop






45. Removes trailing newline






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






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






48. To include modules in perl






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






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