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 a copy of the string as all upper case






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






3. Arrays can be assigned or read in _________






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






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






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






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






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






9. Removes the last element from the array pop






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






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






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






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






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






15. Does the hash key with "keyName" exists






16. In arrays elements need not be __________






17. 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






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






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






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






21. _________ in perl - An associative array






22. Delete the hash entry with the key given






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






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






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






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






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






28. Returns the length of the string including escape sequences






29. Removes trailing newline






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






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






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






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






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






35. Split string into an array using spaces as delimeter






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






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






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






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






40. Removes the first element of the array shift






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






42. 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






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






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






45. To include modules in perl






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






47. To write to a filehandle






48. Reverses the elements of the array






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






50. Remove trailing newline from each element in the array






Can you answer 50 questions in 15 minutes?



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