Memory Hierarchy Q.82

82Consider a main memory system that consists of 8 memory modules attached to the system bus, which is one word wide. When a write request is made, the bus is occupied for 100 nanoseconds (ns) by the data, address, and control signals, During the same 100 ns, and for 500 ns thereafter, the addressed memory module executes one cycle accepting and storing the data. The (internal) operation of different memory modules may overlap in time, but only one request can be on the bus at any time.
The maximum number of stores (of one word each) that can be initiated in 1 millisecond is ........... .

Option : A
Explanation : Each write request, the bus is occupied for 100 n.s
Storing of data requires 100 n.s.
In 100 n.s. – 1 store
100/10⁶ n.s. = 1 store
1 m.s. = 10⁶/100 stores =
10000 stores.

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