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






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






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






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






5. To write to a filehandle






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






7. Removes the first element of the array shift






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






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






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






11. 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






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






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






14. Remove trailing newline from each element in the array






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






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






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






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






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






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






21. Sort and array alphabetically






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






23. Split string into an array using spaces as delimeter






24. _________ in perl - An associative array






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






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






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






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






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






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






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






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






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






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






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






36. To include modules in perl






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






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






39. Delete the hash entry with the key given






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






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






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






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






44. < - > - == - <= - >= - !=






45. Does the hash key with "keyName" exists






46. In arrays elements need not be __________






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






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






49. Removes trailing newline






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