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






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






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






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






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






6. Remove trailing newline from each element in the array






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






8. To include modules in perl






9. 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


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






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






12. Removes trailing newline






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






14. Arrays can be assigned or read in _________






15. Split string into an array using spaces as delimeter






16. Reverses the elements of the array






17. Removes the first element of the array shift






18. 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






19. Delete the hash entry with the key given






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






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






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






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






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






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






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






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






28. In arrays elements need not be __________






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






30. Sort and array alphabetically






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






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






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






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






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






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






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






38. 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






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






40. Removes the last element from the array pop






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






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






43. 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






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






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






46. Does the hash key with "keyName" exists






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






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






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






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