Which of the following are valid metafiles used by the Windows NTFS file system?

The correct answer highlights three valid metafiles used by the Windows NTFS (New Technology File System) file system: the Master File Table (MFT), the Bad Cluster file ($BADCLUS), and the Bitmap file ($Bitmap).

The MFT is a crucial component of NTFS, as it acts as a repository that stores all information about the files and directories on the volume, including metadata such as the file name, size, and location on the disk. Without the MFT, the operating system would not be able to track files and their properties.

The Bad Cluster file, known as $BADCLUS, is used to record any clusters on the disk that are determined to be faulty. This helps in maintaining the integrity of the file system by preventing files from being stored in these unusable areas, thus safeguarding data from being written to locations that could lead to corruption or loss.

The Bitmap file is another important metafile in NTFS, used to track which clusters are allocated and which are free. It effectively helps the filesystem manage storage space and ensure efficient allocation of space to files.

These three metafiles represent key functionalities that support the overall operation and management of the NTFS file system, which is designed for increased reliability and performance on Windows-based