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






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






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






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






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






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






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






8. To write to a filehandle






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






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






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






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






13. Removes the first element of the array shift






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






15. 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






16. Remove trailing newline from each element in the array






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






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






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






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






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






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






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






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






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






26. Arrays can be assigned or read in _________






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






28. 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






29. < - > - == - <= - >= - !=






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






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






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






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






34. Removes the last element from the array pop






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






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






37. Removes trailing newline






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






39. In arrays elements need not be __________






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






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






42. Does the hash key with "keyName" exists






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






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






45. Split string into an array using spaces as delimeter






46. Delete the hash entry with the key given






47. _________ in perl - An associative array






48. Reverses the elements of the array






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






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