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






2. Split string into an array using spaces as delimeter






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






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






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






6. Remove trailing newline from each element in the array






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






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






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






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






11. Reverses the elements of the array






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






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






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






15. Removes trailing newline






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






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






18. Removes the last element from the array pop






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






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






21. Does the hash key with "keyName" exists






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






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






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






25. Delete the hash entry with the key given






26. Removes the first element of the array shift






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






28. To include modules in perl






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






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


31. Returns the length of the string including escape sequences






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






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






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






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






37. Sort and array alphabetically






38. In arrays elements need not be __________






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






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






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






42. To write to a filehandle






43. 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






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






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






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






47. < - > - == - <= - >= - !=






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






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






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






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