Q4: Accurately, Answer all the below questions (10 Marks) 1- Why is the term firmware appropriate for describing microcode that is part of a hardware device? 2- In a block/wakeup mechanism, a process blocks itself to wait for an event to occur. Another process must detect that the event has occurred, and wake up the blocked process. 3 a- Can the operating system detect that a blocked process is waiting for an event that will never occur?

b- What reasonable safeguards might be built into an operating system to prevent processes from waiting indefinitely for an event? 3- Compare and contrast thread dispatching in kernel-level threads and in user-level threads. 4- Suppose the two threads in the following figure operate concurrently. What are the possible outcomes?

Thread T, Thread T2 1234567enterMutua1Exclusion(a);enterMutua1Exclusion(b);exitMutua1Exclusion(b);exitMutua1Exclusion(a);1234567enterMutua1Exclusion(b);enterMutualExclusion(a);exitMutualExclusion(a);exitMutua1Exclusion(b)