Question

Which of the following has the refreshing circuitry?

• A. Static RAM
• B. Dynamic RAM
• C. PROM
• D. EPROM

Hint:

DRAM = Refresh needed. SRAM = No refresh, faster but costlier.

Answer 1

The Correct Option is B

In the realm of memory types used in electronics, there are different mechanisms by which data is stored and accessed. Understanding these mechanisms helps determine why certain types of memory require refreshing and others do not.

To determine which type of memory has refreshing circuitry, let's examine each given option:

1. Static RAM (SRAM): SRAM stores data using flip-flops made of transistors. It does not require refreshing because the data remains as long as power is supplied. Hence, SRAM lacks refreshing circuitry.
2. Dynamic RAM (DRAM): DRAM stores data using capacitors, which hold electrical charges. These capacitors gradually lose charge over time, so DRAM requires periodic refreshing to maintain data integrity. Thus, DRAM includes refreshing circuitry.
3. PROM (Programmable Read-Only Memory): Once programmed, PROM does not need to be refreshed. Data is permanently stored by fusing connections.
4. EPROM (Erasable Programmable Read-Only Memory): Similar to PROM, EPROM stores data permanently. Data can be erased using ultraviolet light, but it doesn't require refreshing.

Based on this analysis, Dynamic RAM has the refreshing circuitry, as it relies on regular refreshing to retain data.