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






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






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






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






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






6. Removes the last element from the array pop






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






8. To include modules in perl






9. Removes the first element of the array shift






10. In arrays elements need not be __________






11. Does the hash key with "keyName" exists






12. _________ in perl - An associative array






13. Delete the hash entry with the key given






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






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






16. The __________ in perl: - uses grave marks `command args`- returns the output of the command to the variable you specify - if $output = `command arg` the output is stored all in one variable (all lines seperated by n) - if @output = `command arg` the






17. 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






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






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






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






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






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






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






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






25. To write to a filehandle






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






27. Reverses the elements of the array






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. The variable that provides the last index of an array






30. Removes trailing newline






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






32. Remove trailing newline from each element in the array






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






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






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






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






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






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






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






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






41. Arrays can be assigned or read in _________






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






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






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






45. Sort and array alphabetically






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






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






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






49. < - > - == - <= - >= - !=






50. Split string into an array using spaces as delimeter