Exam 9: File and Folder Administration

When executed on Microsoft Windows, Ruby program file and path data must be specified using the backslash character.

Ruby allows you to create new folders using the Dir class's creatdir method.

If you develop a script that will run on different operating systems, you will need a way to determine which type of operating system your script is currently executing on. One way to do this is by taking advantage of Ruby's RUBY_PLATFORM special variable.

Which of the following File class methods can be used to change a file's name?

Which of the mode options opens a file for both reading and writing, overwriting any existing text. If the specified file does not exist, it is created.

Using the File class's folder? method, you can determine if a resource is a folder or something else (socket, pipe, etc.).

The Dir class's entries method returns the contents of the folder as an array.

The Folder class gives you access to various folder administration methods.

Which of the following File class methods can be used to determine if a resource is a file or something else?

The File class gives you access to various file administration methods.

A reference can be set up for a file using which of the following File methods?

Which of the mode options opens a file in append mode, preserving any preexisting text while allowing new text to be added to the end of the file.

Which of the following Dir class methods can be used to return a list of the contents of a folder in the form of an array.

Ruby lists the contents of a folder using the Dir class's files method.

If an empty file were used as input to the operator, a ____ value is returned.

Which of the following methods can be used to open a file for reading?

Which of the mode options opens a file in append mode, allowing for both reading and writing while preserving any preexisting text.

Which of the mode options opens a file for reading only?

Given a script named DispMsg.rb, if an empty file were used as input to: ruby DispMsg.rb a value of nil would be assigned to the message variable in the statement: message = STDIN.gets

Ruby allows you to delete both files and folders using the File and Dir classes's delete methods.