Which type of memory uses capacitors to store data and needs periodic refreshing?
A. DRAM
B. ROM
C. SRAM
D. Flash memory
Answer: Option A
Solution (By JKSSB Mock Tests)
DRAM (Dynamic RAM) uses capacitors to store bits; they leak charge and must be refreshed periodically. SRAM uses flip-flops and does not need refreshing.
Explanation:
CD-R (Recordable) can be written once and read many times. CD-RW is rewritable, and CD-ROM is read-only. DVD-RAM is a rewritable optical disc.
Explanation:
Modern computers may use flash ROM, EEPROM, or EPROM for BIOS; however, flash ROM is most common. But all are non-volatile and can be used.
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