Which of the following options correctly arranges the memory units in descending order of their storage capacities (largest to smallest)?

Correct option is D

The correct descending order of memory units from largest to smallest storage capacity is Terabyte (TB) > Gigabyte (GB) > Megabyte (MB) > Kilobyte (KB). Each unit represents a progressively smaller amount of data, following the standard hierarchy used in computer memory and storage measurement. Hence, option (d) correctly arranges the memory units.
Important Key Points:
1. Standard Memory Unit Hierarchy: KB < MB < GB < TB (ascending order), so descending order is the reverse.
2. Relative Sizes:
· 1 KB = 1,024 bytes
· 1 MB = 1,024 KB
· 1 GB = 1,024 MB
· 1 TB = 1,024 GB
3. Common Usage:
· KB → small text files
· MB → images, songs
· GB → applications, movies
· TB → large storage systems, servers
4. Why Order Matters? Understanding unit hierarchy is essential for storage planning and exam accuracy.
5. Remember the mnemonic: “K M G T” (ascending) or “T G M K” (descending).
6. Industry Standard: This hierarchy is universally used in computer science and IT.