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






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






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






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






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






6. 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


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






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






9. Split string into an array using spaces as delimeter






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






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






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






14. Sort and array alphabetically






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






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






17. _________ in perl - An associative array






18. Removes the last element from the array pop






19. In arrays elements need not be __________






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






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






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






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






24. Removes the first element of the array shift






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






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






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






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






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






30. Arrays can be assigned or read in _________






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






32. 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






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






34. Returns the length of the string including escape sequences






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






36. Removes trailing newline






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






38. To include modules in perl






39. Delete the hash entry with the key given






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






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






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






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






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






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






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






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






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






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






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






Can you answer 50 questions in 15 minutes?



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