Multiple choice

A main memory unit with a capacity of 4 megabytes is built using 1M × 1-bit DRAM chips. Each DRAM chip has 1K rows of cells with 1K cells in each row. The time taken for a single refresh operation is 100 nanoseconds. The time required to perform one refresh operation on all the cells in the memory unit is

  1. 100 nanoseconds

  2. 100*210 nanoseconds

  3. 100*220 nanoseconds

  4. 3200*220 nanoseconds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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