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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. Returns a copy of the string as all lower case






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






4. Arrays can be assigned or read in _________






5. To include modules in perl






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






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






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






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






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






11. Delete the hash entry with the key given






12. Sort and array alphabetically






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






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






15. Returns the length of the string including escape sequences






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






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






18. In arrays elements need not be __________






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






20. Split string into an array using spaces as delimeter






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






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






23. Removes the last element from the array pop






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






25. Reverses the elements of the array






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






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






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






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






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






31. Removes the first element of the array shift






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






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






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






35. The __________ in perl: - uses grave marks `command args`- returns the output of the command to the variable you specify - if $output = `command arg` the output is stored all in one variable (all lines seperated by n) - if @output = `command arg` the






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






37. < - > - == - <= - >= - !=






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






39. Does the hash key with "keyName" exists






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






41. _________ in perl - An associative array






42. Remove trailing newline from each element in the array






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






44. Removes trailing newline






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






46. 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






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






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






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






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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