Which of the following storage device uses SRAM or DRAM?
A.
USB flash drive
B.
Solid-state drive (SSD)
C.
Blu-ray Disc
D.
CD drive
Explanation:
A solid-state drive (SSD) is a data storage device that uses solid-state memory to store persistent
data. An SSD emulates a hard disk drive interface, thus easily replacing it in most applications. It is
also known as solid-state hard disk drive. SSDs have no moving parts; hence, they are less fragile and
silent than hard disks. As there are no mechanical delays, SSDs usually enjoy low access time and
latency. An SSD using SRAM or DRAM (instead of flash memory) is often called a RAM-drive, which
should not be confused with a RAM disk.
Answer option C is incorrect. Blu-ray Disc, also known as Blu-ray or BD, is an optical disc storage
medium. It is designed to supersede the standard DVD format for storing high-definition video,
PlayStation 3 games, and other data, with up to 25 GB per single layered, and 50 GB per dual layered
disc. Blu-ray Disc was developed by the Blu-ray Disc Association, a group representing makers of
consumer electronics, computer hardware, and motion pictures. The disc has the same physical
dimensions as standard DVDs and CDs. It is called Blu-ray Disc because of the blue-violet laser which
is used to read the disc. Blu-ray uses a shorter wavelength, a 405 nm blue-violet laser, and allows for
almost six times more data storage than on a DVD.
Answer option D is incorrect. CD drive is used for read/write operations on CDs. The CD drives that
are capable of performing write operations on CDs are also known as CD burners. However, most ofthe CD drives on computers have read only capability. CD drives with read-only capability are also
known as CD-ROM (Compact Disc Read-Only Memory) drives. A CD drive is installed inside the
computer case and can be connected to IDE, SCSI, SATA, or firewire interface.
Answer option A is incorrect. A USB flash drive consists of flash memory data storage device
integrated with a USB (Universal Serial Bus) 1.1 or
2.0 interface.
Reference. “http.//en.wikipedia.org/wiki/Solid-state_drive”