In a client-server socket model, which sequence correctly represents the communication flow?

A process has: Arrival Time = 1 ms First CPU Allocation = 4 ms Completion Time = 15 ms Burst Time = 9 ms What is the waiting time?

What is the value of semaphore S after this sequence? Initial Value: S = 3 Execution: wait(S); wait(S); signal(S);

A system satisfies bounded waiting but allows two processes simultaneously inside the critical section. Which requirement of solution to critical-section problem fails? 

On a system with two CPUs, Process P1 disables interrupts on CPU1 and enters the critical section. What is the main problem?

Considering the code:  #include #include #include #include sem_t empty; sem_t full; int item = 0; void* producer(void* arg) { sem_wait(&empty); item = 100; printf(“Producer produced item\n”); sem_post(&full); return NULL; } void* consumer(void* arg) { sem_wait(&full); printf(“Consumer consumed item = %d\n”, item); sem_post(&empty); return NULL; } int main() { pthread_t p, c; sem_init(&empty, 0, 1); sem_init(&full, 0, 0); pthread_create(&c, NULL, consumer, NULL); sleep(1); pthread_create(&p, NULL, producer, NULL); pthread_join(p, NULL); pthread_join(c, NULL); return 0; } Which statement is CORRECT?

A system uses a semaphore queue to control access to a shared printer. Process P1 requests access first and is placed in the waiting queue. However, every time the printer becomes available, newly arriving higher-priority processes (P2, P3, P4, …) are always selected before P1. As a result, P1 never gets access to the printer even though the system continues running normally. What synchronization issue is demonstrated?

Which semaphore type can have values like 0,1,2,3,…?

Which sequence correctly protects a critical section using a mutex lock?

What does William James think is the distinctive mark of psychological phenomena– the subject matter of psychology?