COMPUTER HARDWARE
STORAGE DEVICES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Use number of concentric tracks
|
|
|
Once data is been recorded and the process has been finalised then the disks become Read Only.
|
|
|
Storage size is smaller then CD-ROM
|
|
|
Allows simultaneous read /write and great longevity
|
Detailed explanation-1: -Primary memory usually refers to Random Access Memory (RAM), while secondary storage refers to devices such as hard disk drives, solid state drives, removable “USB” drives, CDs, and DVDs.
Detailed explanation-2: -Optical media offer the following advantages for storing data over conventional magnetic disks: Mass storage capacity (on the order of gigabytes) Mountable/unmountable storage units. Low cost per bit of storage.
Detailed explanation-3: -Option (D) Among the optical storage devices, the blu-ray disk has the highest memory capacity. As the one layered and one-sided blu-ray disc can possess the data up to 50 GB and the double-sided blu-ray hold just double data.
Detailed explanation-4: -An optical disk drive uses a laser beam to read the data from the disk as it is spinning. It distinguishes between the pits and lands based on how the light reflects off the recording material. The drive uses the differences in reflectivity to determine the 0 and 1 bits that represent the data.