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. Removes trailing newline






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






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






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






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






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






7. Returns the length of the string including escape sequences






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






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






10. Reverses the elements of the array






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






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. Remove trailing newline from each element in the array






14. Arrays can be assigned or read in _________






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






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

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






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






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






20. Sort and array alphabetically






21. < - > - == - <= - >= - !=






22. To include modules in perl






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






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






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






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






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






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






29. In arrays elements need not be __________






30. Removes the last element from the array pop






31. Split string into an array using spaces as delimeter






32. _________ in perl - An associative array






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






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






35. Removes the first element of the array shift






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






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






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






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






40. To write to a filehandle






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






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






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






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






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






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






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






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






49. Delete the hash entry with the key given






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