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






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






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






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






5. To include modules in perl






6. 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






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






8. Sort and array alphabetically






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






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






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






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






13. Removes the first element of the array shift






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






15. 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


16. Delete the hash entry with the key given






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






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






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






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






21. 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






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






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






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






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






26. < - > - == - <= - >= - !=






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






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






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






30. Removes the last element from the array pop






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






32. _________ in perl - An associative array






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






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






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






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






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






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






39. Arrays can be assigned or read in _________






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






41. Removes trailing newline






42. To write to a filehandle






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






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






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






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






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






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






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






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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