During online class we studied that, if the semaphore operations Wait and Signal are not executed atomically,then mutual exclusion may be violated. Assume that Wait and Signal are implemented as...

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Extracted text: During online class we studied that, if the semaphore operations Wait and Signal are not executed atomically,then mutual exclusion may be violated. Assume that Wait and Signal are implemented as below: void Wait (Semaphore s) { while (S.count <= 0)="" {}="" s.count="s.count" -="" 1;="" void="" signal="" (semaphore="" s)="" {="" s.count="S.count" +="" 1;="" code:="" (a)="" a)="" build="" a="" scenario="" of="" context="" switches="" that="" includes="" two="" threads="" and="" permit="" to="" enter="" a="" critical="" section="" secured="" by="" a="" single="" mutex="" semaphore="" as="" a="" result="" of="" a="" lack="" of="" atomicity.="" wait(s)="{while" s="">< 0;="" s--;="" }="" signal(s)="{S++;" }="" code:="" (b)="" b)="" assume="" ,s="1,P&Q" protects="" a="" critical="" region="" with="" thesemaphore="" s.="" show="" that="" if="" one="" of="" these="" operations="" is="" not="" executed="" atomically,="" we="" mayviolate="" mutual="">