State Amdahls law. Assume that we need upgrade the system to get the over speedup of 1.5

S= 1.5) we plan to replace the I/O device. The average I/O utilization is 60%.

Find the speedup factor (k) for the I/O device

Explain with the help of diagram layers of virtual input/output (I/O) system.

Explain with the help of a diagram memory hierarchy. Explain how speed, cost and capacity vary as we move from the top to bottom of the pyramid.

what is cache memory? How it speeds up the system.