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






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






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






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






5. Removes the last element from the array pop






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






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






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






9. < - > - == - <= - >= - !=






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






11. 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


12. Removes the first element of the array shift






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






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






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






16. Delete the hash entry with the key given






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






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






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






20. 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






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






22. Sort and array alphabetically






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






24. _________ in perl - An associative array






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






26. Does the hash key with "keyName" exists






27. Removes trailing newline






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






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






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






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






32. 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






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






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






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






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






37. Split string into an array using spaces as delimeter






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






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






40. 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






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






42. Arrays can be assigned or read in _________






43. To include modules in perl






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






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






46. To write to a filehandle






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






48. Reverses the elements of the array






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






50. Remove trailing newline from each element in the array






Can you answer 50 questions in 15 minutes?



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