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






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






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






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






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






6. Split string into an array using spaces as delimeter






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






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






9. Does the hash key with "keyName" exists






10. 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


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






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






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






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






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






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






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






18. 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






19. Sort and array alphabetically






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






21. Removes the last element from the array pop






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






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






24. Removes the first element of the array shift






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






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






27. _________ in perl - An associative array






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






29. Remove trailing newline from each element in the array






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






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






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






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






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






36. Removes trailing newline






37. To include modules in perl






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






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






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






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






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






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






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






45. Returns the length of the string including escape sequences






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






47. < - > - == - <= - >= - !=






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






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






50. In arrays elements need not be __________