GATE 2018 Previous Year Paper Solution Question 23 :- Computer Science

In this video question which was asked in the exam of GATE 2018 is discussed.

Question :- A 32-bit wide main memory unit with a capacity of 1 GB is built using 256M X 4-bit DRAM chips. The number of rows of memory cells in the DRAM chip is 2^14. The time taken to perform one refresh operation is 50 nanoseconds. The refresh period is 2 milliseconds. The percentage (rounded to the closest integer) of the time available for performing the memory read/write operations in main memory unit is _________.

The solution is given in the video.