Explanation:
SRAM is fast and expensive compared to DRAM. It does not require refreshing and is used for cache memory. DRAM is used as main memory and is dense and cheaper.
Explanation:
As of 2026, USB pen drives commonly range from 16 GB to 256 GB or higher. While larger capacities exist, 16-256 GB is typical for mainstream use.
Explanation:
Optical discs are immune to magnetic fields and are relatively durable under normal handling, while magnetic disks can be damaged by strong magnetic fields. However, optical is slower and lower capacity.
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