Which term describes a device that reorganizes data to improve access times on disk?

Which term describes a device that reorganizes data to improve access times on disk?

• A. Defragmentation
• B. Compression
• C. Disk Cleanup
• D. File Management

Answer: (A)

When data on a disk becomes fragmented, a single file’s pieces end up scattered in noncontiguous blocks. That makes the disk head move around more to read the entire file, which slows access times. Defragmentation is the process that reorganizes those blocks so pieces of the same file sit next to each other and free space is consolidated, reducing the back-and-forth movement and speeding up reads and writes. Because this directly improves how quickly data can be accessed by rearranging its layout on the disk, it’s the best match among the options. The other terms describe different ideas: compression reduces file size, disk cleanup removes unnecessary files, and file management is a broader concept. (Note: on solid-state drives, fragmentation has less impact, so defragmentation is less commonly needed there.)

When data on a disk becomes fragmented, a single file’s pieces end up scattered in noncontiguous blocks. That makes the disk head move around more to read the entire file, which slows access times. Defragmentation is the process that reorganizes those blocks so pieces of the same file sit next to each other and free space is consolidated, reducing the back-and-forth movement and speeding up reads and writes. Because this directly improves how quickly data can be accessed by rearranging its layout on the disk, it’s the best match among the options. The other terms describe different ideas: compression reduces file size, disk cleanup removes unnecessary files, and file management is a broader concept. (Note: on solid-state drives, fragmentation has less impact, so defragmentation is less commonly needed there.)