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






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






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






4. Removes trailing newline






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






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






7. Removes the first element of the array shift






8. Reverses the elements of the array






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






10. Removes the last element from the array pop






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






12. Sort and array alphabetically






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






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






15. To write to a filehandle






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






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






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






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






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






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






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






23. 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






24. Split string into an array using spaces as delimeter






25. < - > - == - <= - >= - !=






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






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






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






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






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






31. _________ in perl - An associative array






32. Remove trailing newline from each element in the array






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






34. Returns the length of the string including escape sequences






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






36. In arrays elements need not be __________






37. Arrays can be assigned or read in _________






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






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






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






41. Delete the hash entry with the key given






42. To include modules in perl






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






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






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






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






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






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






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






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