Which storage device stores digitally encoded data on rapidly rotating magnetic disks and can be internal or portable?

Which storage device stores digitally encoded data on rapidly rotating magnetic disks and can be internal or portable?

• A. Hard Drive
• B. RAM
• C. Central Processing Unit
• D. Input Device

Answer: (A)

Storing digitally encoded data on rapidly rotating magnetic disks describes magnetic disk storage, which is the job of a hard drive. A hard drive uses one or more platters coated with magnetic material; as the platters spin, read/write heads magnetize tiny regions on the surfaces to store data. This arrangement is non-volatile, so the data stays even when power is off. Hard drives can be internal within a computer or in portable external enclosures, making them versatile for different setups. This differs from RAM, which is volatile memory used for quick, temporary data access while the computer runs. The CPU is the processor, not a storage device. An input device (like a keyboard or mouse) is used to enter data, not to store it. So the best fit for the description is the hard drive.

Storing digitally encoded data on rapidly rotating magnetic disks describes magnetic disk storage, which is the job of a hard drive. A hard drive uses one or more platters coated with magnetic material; as the platters spin, read/write heads magnetize tiny regions on the surfaces to store data. This arrangement is non-volatile, so the data stays even when power is off. Hard drives can be internal within a computer or in portable external enclosures, making them versatile for different setups.

This differs from RAM, which is volatile memory used for quick, temporary data access while the computer runs. The CPU is the processor, not a storage device. An input device (like a keyboard or mouse) is used to enter data, not to store it.

So the best fit for the description is the hard drive.