6. (2 points) Which of the following is NOT a motivating factor of the thread abstraction: a) Moore's law is ending b) The multi/many-core architectures are prevailing c) Costly inter-process communication d) Threads rely on message passing for inter-thread communication 7.(2 points) Where to declare a variable called counter that can be seen by all worker threads, in the following piece of code [CODE FOR QUESTION 7] #include #include # include

a) void worker (void &arg) f *worker logic */ int main(void) i I C) pthread t tidl, tid2 pthread create(&tid1. NULL. worker. NULL) pthread create(&tid2. NULL. worker. NULL) d) pthread join(tid1. NULL) pthread_join(tid2. NULL) return 0 8. (2 points) On single-processor systems, in a correct solution to the critical section problem: A process that does not execute a code-related to the Critical Section should not prevent others from entering the Critical Section Processes should enter the Critical Section in First-Come-First-Served fashion Some slow processes may starve Interrupts have to be disabled when one process is in the Critical