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POInterview Q - Design File System - Review
 

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    <p>All,</p> <p>I was recently asked in one of the technical interviews to write a high level design for a File Sysem. My answer to the question was as follows. I would request everyone to please review and let me know if there are suggestions/improvement:</p> <pre><code> interface BaseFileSystem { /*Basic file/folder attributes are: 1. File/Folder Size 2. File/Folder Date created 3. File/Folder Date Modified 4. File/Folder permissions - Read, write and execute 5. File/Folder Owner - Owner of the file who defines permissions for other users 6. File/Folder Visibility - Hidden or Visible 7. File/Folder Name Hence each one of the above attributes would have public &lt;return type&gt; get() and public void set&lt;AttributeName&gt;(&lt;variable datatype&gt;) */ } public class File implements BaseFileSystem { /*The `File` class should implement all of the methods from interface `BaseFilesystem`. In addition, it must also implement following specific methods that can only be associated with physical files*/ public String getFileExtension(){….} public void setFileExtension(String value) {….} public String[] getAssociatedPrograms(){ …..} public void executable(){ …. }; } public class Folder implements BaseFileSystem { /*The `Folder` class should implement all of the methods from interface `BaseFileSystem`. In addition, it must also implement following specific methods that can only be associated with the physical 'folders'*/ public BaseFileSystem[] getSubFoldersAndFiles(){ …. } public void addSubFolderAndFiles(BaseFileSystem fileObj) { …. } public void executable(){throw new UnsupportedOperationException();} } </code></pre> <p>Additionally, any general pointers to such design questions would be greatly appreciated.</p>
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