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 _______ 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






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






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






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






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






6. 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






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






8. Does the hash key with "keyName" exists






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






10. Delete the hash entry with the key given






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






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






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






14. Removes the last element from the array pop






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






16. To write to a filehandle






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






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






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






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






21. Arrays can be assigned or read in _________






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






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






24. Reverses the elements of the array






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






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






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






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






29. Removes trailing newline






30. Remove trailing newline from each element in the array






31. Removes the first element of the array shift






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






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






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






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






36. Sort and array alphabetically






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






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






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






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


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






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






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






44. Split string into an array using spaces as delimeter






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






46. To include modules in perl






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






48. In arrays elements need not be __________






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






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