Ms dos provide no means of concurrent processing.three complication that concurrent processing adds to an operating system? ?

List at least three things that a running process might do that would cause the scheduler not to move it to the ready state when it stops running.

What is an advantage of a large scheduling quantum? What is a disadvantage?

Measurements of a certain system have shown that the average process runs for a time T before blocking on I/O. A process switch requires a time S, which is effectively wasted (overhead). The CPU’s efficiency is the fraction of its time its spends executing user programs, i.e., executing user processes. For round robin scheduling with quantum Q, give a formula for the CPU efficiency for each of the following: (a) Q = ∞ (b) Q > S + T (c) S Operating Systems General Concepts 3898