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. To include modules in perl






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






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






4. < - > - == - <= - >= - !=






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






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






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






8. _________ in perl - An associative array






9. Returns the length of the string including escape sequences






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






11. Reverses the elements of the array






12. The open() statement in perl: open(________, file_mode, "filename.txt")






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






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






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






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






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






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






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






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






21. Sort and array alphabetically






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






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






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






25. Arrays can be assigned or read in _________






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






27. 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






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






30. Removes the last element from the array pop






31. Remove trailing newline from each element in the array






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






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






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






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






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






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






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






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






40. Delete the hash entry with the key given






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






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






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






44. Does the hash key with "keyName" exists






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






46. 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


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






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






49. Removes trailing newline






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