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 - An associative array






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






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






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






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






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






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






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






9. Removes the last element from the array pop






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






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






12. 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






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






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






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






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






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






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






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






20. To write to a filehandle






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






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






23. Removes the first element of the array shift






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






25. Reverses the elements of the array






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






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






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






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






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






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






32. Delete the hash entry with the key given






33. 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






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






35. Does the hash key with "keyName" exists






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






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






38. Returns the length of the string including escape sequences






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






40. To include modules in perl






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






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






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






44. 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


45. Arrays can be assigned or read in _________






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






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






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






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






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