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. 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






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






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






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






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






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






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






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






9. Does the hash key with "keyName" exists






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






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






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






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






14. 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






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






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






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






18. To include modules in perl






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






20. Arrays can be assigned or read in _________






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






22. Removes trailing newline






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






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






25. _________ in perl - An associative array






26. 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


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






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






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






30. < - > - == - <= - >= - !=






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






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






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






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






35. Removes the first element of the array shift






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






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






38. Split string into an array using spaces as delimeter






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






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






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






42. Sort and array alphabetically






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






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






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






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






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






48. To write to a filehandle






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






50. Returns the length of the string including escape sequences







Sorry!:) No result found.

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