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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
Dynamic RAM (DRAM) stores each bit of data in a separate capacitor. Due to
leakage, the stored charge tends to dissipate over time and needs to be refreshed
periodically. Consider the following statements:
P: DRAM requires refreshing because it uses capacitors to store bits.
P: DRAM requires refreshing because it uses capacitors to store bits.
Q: SRAM does not require refreshing because it uses flip-flops instead of
capacitors.
R: DRAM is faster than SRAM because it needs less frequent access.
S: DRAM is more suitable for main memory than SRAM due to its density.
R: DRAM is faster than SRAM because it needs less frequent access.
S: DRAM is more suitable for main memory than SRAM due to its density.
Solution
- P: ✔ True — DRAM cells use capacitors that leak charge and hence must be refreshed periodically.
- Q: ✔ True — SRAM uses flip-flops, so it retains data without refreshing.
- R: ✗ False — DRAM is actually slower than SRAM.
- S: ✔ True — DRAM is denser and cheaper, making it ideal for main memory.
✅ Correct statements: P, Q, and S
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