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






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






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






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






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






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






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






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






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






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






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






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






14. Does the hash key with "keyName" exists






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






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






17. Sort and array alphabetically






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






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 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






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






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






23. Returns the length of the string including escape sequences






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






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






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






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






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






29. Delete the hash entry with the key given






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






31. Arrays can be assigned or read in _________






32. Split string into an array using spaces as delimeter






33. In arrays elements need not be __________






34. Removes the first element of the array shift






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






36. Reverses the elements of the array






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






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






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






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






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






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






43. 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






44. Removes the last element from the array pop






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






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






47. To write to a filehandle






48. Remove trailing newline from each element in the array






49. 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






50. < - > - == - <= - >= - !=






Can you answer 50 questions in 15 minutes?



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