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File Control Blocks (FCBs) are not well-suited for DOS 2.0 and above primarily because they are limited in functionality and flexibility. DOS 2.0 introduced a more sophisticated file system that supports long file names, directories, and more advanced file management features, which FCBs do not accommodate. Additionally, FCBs require direct manipulation of file data structures, making them less efficient and harder to manage compared to the newer file handling methods introduced in DOS 2.0 and later versions. As a result, the use of FCBs is largely deprecated in favor of the more versatile file handling APIs.
What else can I help you with?
What type of blocks are files stored in on a new disk?
Files on a new disk are typically stored in blocks known as allocation units or clusters. These blocks are fixed-size segments of disk space, which the file system uses to manage data efficiently. The size of these blocks can vary depending on the file system and the disk's formatting, but common sizes range from 512 bytes to several kilobytes. When a file is saved, it occupies one or more of these blocks, depending on its size.
The data blocks of a very large file in the Unix file system are allocated using?
an extensioin of indexed allocation
Traditional file environment?
Traditional file environment is not well suited to save data in them. They make it difficult to read the data as they are more unstructed.
What holds information about the layout of blocks and sectors in the unix file system?
Superblocks.
How is the information associating disc blocks with inodes represented?
In a filesystem, the association between disk blocks and inodes is represented through a data structure called an inode table. Each inode contains metadata about a file, including pointers to the disk blocks where the file's data is stored. These pointers can be direct, indirect, or double indirect, allowing the inode to reference multiple blocks on disk efficiently. By using this structure, the filesystem can quickly locate the data associated with each file.
Distinguish between continuous file allocation and chained file allocation?
Continuous File Allocation - uses continuous range of blocks in logical block space Chained File Allocation - each block pointer to the next on disk
What type of utility are WinZip and PKZIP?
They are 'file compression' utilities. Basically, when windows saves a file, it's saved in fixed 'blocks' of data. ZIP programs 'strip out' the unused spaces in these blocks - reducing the amount of space the file occupies on the hard-drive. The files are 'unzipped' when they're in use, then compressed again back for storage.
MPEG file are sound video movie or all above files?
all above
What is a photographic file called?
A photographic file is commonly referred to as an image file or a photo file. These files can come in various formats, such as JPEG, PNG, TIFF, or RAW, each with specific characteristics suited for different uses. The file format typically affects the image quality, compression, and compatibility with software.
The advantages of the variant of linked allocation that uses a FAT to chain together the blocks of a file?
The advantage is that while accessing a block that is stored at the middle of a file, its location can be determined by chasing the pointers stored in the FAT as opposed to accessing all of the individual blocks of the file in a sequential manner to find the pointer to the target block. Typically, most of the FAT can be cached in memory and therefore the pointers can be determined with just memory accesses instead of having to access the disk blocks.
What is Access Control Lists?
A file, the contents of which defines who can perform actions on a file or folder
How does MS-DOS implement random access to file?
MS-DOS implements random access to files using a combination of file control blocks (FCBs) and the file system's structure. When a file is opened, the system retrieves its FCB, which contains information such as the file's size and current position. Random access is achieved by allowing the user to move the file pointer to any position within the file using commands like SEEK, enabling read and write operations from that specific location without needing to read through the entire file sequentially. This direct access is facilitated by the underlying disk structure and the way MS-DOS manages file I/O operations.
