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 with the first letter upper case






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






3. Reverses the elements of the array






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






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






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






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






8. To write to a filehandle






9. Does the hash key with "keyName" exists






10. Split string into an array using spaces as delimeter






11. Removes trailing newline






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






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






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






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






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






17. Remove trailing newline from each element in the array






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






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






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






21. Sort and array alphabetically






22. Delete the hash entry with the key given






23. 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






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






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






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






27. _________ in perl - An associative array






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






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






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






31. Arrays can be assigned or read in _________






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






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






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






35. To include modules in perl






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






37. Join the elements of the array seperating the elements with the ':' character


38. Removes the first element of the array shift






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






40. Returns the length of the string including escape sequences






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






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






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






44. Removes the last element from the array pop






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






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






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






48. 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






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






50. < - > - == - <= - >= - !=