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. The variable that provides the last index of an array






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






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






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






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






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






7. Returns the length of the string including escape sequences






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






9. The two primary methods of executing _______ in perl: - system("command args") - - `command args`






10. Removes trailing newline






11. To include modules in perl






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






13. Split string into an array using spaces as delimeter






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






15. Sort and array alphabetically






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






17. Delete the hash entry with the key given






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






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






20. Removes the last element from the array pop






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






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






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






24. Does the hash key with "keyName" exists






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






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






27. _________ in perl - An associative array






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






29. Reverses the elements of the array






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






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






32. 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






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






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






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






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






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






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






39. Removes the first element of the array shift






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






41. Arrays can be assigned or read in _________






42. < - > - == - <= - >= - !=






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






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






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






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


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






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






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






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