NIELIT 2016 MAR Scientist B - Section C: 10

Question

Disadvantage of dynamic RAM over static RAM is

• A. higher power consumption.
• B. variable speed.
• C. need to refresh the capacitor charge every once in two milliseconds.
• D. higher bit density.

Answer 1

DRAM is slower than SRAM,

DRAM requires refreshing hence hower power ponsumtion is there.

Hence SRAM has higher speed.

Hence the option B is coorect.

Answer 2

DRAM has more idle power consumption which SRAM  which has more operational power consumption 
SRAMs are way faster than DRAMs due to which they are used for cache memory
DRAMs require periodic resfreshes 
DRAM has higher bit density than SRAM

So the correct answer will be B

Answer 3

Option C

Because DRAM consists of Capacitors. So, there is a need to refresh capacitor charge every once in two milliseconds.