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






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






3. 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






4. Removes the first element of the array shift






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






6. In arrays elements need not be __________






7. _________ in perl - An associative array






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






9. Reverses the elements of the array






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






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






12. < - > - == - <= - >= - !=






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






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






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






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






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






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






19. Does the hash key with "keyName" exists






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






21. Removes trailing newline






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






23. To include modules in perl






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






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






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






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






28. Sort and array alphabetically






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






30. 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






31. Remove trailing newline from each element in the array






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






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






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






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






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






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






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






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






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






41. Split string into an array using spaces as delimeter






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






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






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






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






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






47. Removes the last element from the array pop






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






49. Arrays can be assigned or read in _________






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