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 as all lower case






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






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






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






5. Returns the length of the string including escape sequences






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






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






8. Sort and array alphabetically






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






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






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






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






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






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






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






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






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






18. Reverses the elements of the array






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






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






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






22. _________ in perl - An associative array






23. 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


24. 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






25. Split string into an array using spaces as delimeter






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






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






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






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






30. Arrays can be assigned or read in _________






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






32. 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






33. To write to a filehandle






34. < - > - == - <= - >= - !=






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






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






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






38. Does the hash key with "keyName" exists






39. Remove trailing newline from each element in the array






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






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






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






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






44. 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






45. Removes trailing newline






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






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






48. Removes the first element of the array shift






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






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