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 the last element from the array pop






2. < - > - == - <= - >= - !=






3. To include modules in perl






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






5. 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


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






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






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






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






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






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






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






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






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






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






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






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. Removes the first element of the array shift






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






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






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






22. To write to a filehandle






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






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






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






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






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






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






29. Remove trailing newline from each element in the array






30. Sort and array alphabetically






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






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






33. Removes trailing newline






34. 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






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






36. Arrays can be assigned or read in _________






37. Split string into an array using spaces as delimeter






38. Reverses the elements of the array






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






40. Does the hash key with "keyName" exists






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






42. In arrays elements need not be __________






43. Delete the hash entry with the key given






44. Returns the length of the string including escape sequences






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






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






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






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






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






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






Can you answer 50 questions in 15 minutes?



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